What is Aluminium? an in depth technical guide
Aluminium
An in depth guidemetals4U stock an extensive range of aluminium products in a wide choice of grades and profiles. The grades we stock are 6082, 6082 T6, 6063, 1050A-H14, 5754-H111 and EN AW-5449A which are available in the following profile presentations;
Angle, angle stair edging, nosing section, z section, round rod/bar square, T section, flat, box, tube, flat, channel, moulding, wall board lining section, sheet, stucco sheet, treadbrite/propeller plate, 5- bar tread plate and telescopic tube. These products are all available in mill finish, with some products being available in bright polish, brushed polish and anodised satin finish presentations.
Aluminium
Aluminium is produced from the ore, Bauxite. The bauxite is made into alumina powder and is then smelted at a high temperature to produce aluminium metal. Aluminium is fully recyclable without losing its properties or qualities, even with repeated recycling sequences. Aluminium is the most plentiful metal on earth; it is lightweight it has a low density, is non-toxic, has high thermal and electrical conductivity and does not spark. Aluminium contains no iron (Fe) so is not magnetisable, but it is paramagnetic. Aluminium will be weakly attracted to an externally applied magnetic field, however, this will not be maintained once this field is removed; no magnetism will remain.
It has a smooth surface and is simple to cast, machine and form.
Aluminium is categorised in series of 1000s to help choose the most appropriate series for your project. The first number of the aluminium grade refers to the alloying element. Within each series there are several grades that have differing properties depending on the chemical composition of that individual grade. Letters and numbers stated after the grade number refer to the type of temper or hardening completed during manufacture.
Aluminium grades can be further classified into non heat treatable and heat treatable series. The 1000, 3000, 4000 and 5000 series are mainly non-heat treatable, although the addition of magnesium and copper in some of the 4000 series silicon alloys make some of that grade heat treatable. Series 2000, 6000 and 7000 are heat treatable.
The non-heat treatable aluminium grades are hardened by cold working and forming, although the area adjacent to the weld zone will in effect become heat annealed but this unavoidable. The heat treatable grades are hardened by using elevated thermal treatment, quenching and if applicable, precipitation heat treatment, also known as artificial aging.
Grades of Aluminium
The 1000 series is the purest of all commercial aluminium alloys with a minimum aluminium content of 99%. This series offers extremely high corrosion resistance with high thermal and electrical conductivity, excellent workability, and low mechanical properties.
The 2000 series of aluminium uses copper as the main alloying element. The 2000 series is renowned for its high performance and excellent strength through a broad range of temperatures. Once solution heat treated, this series of aluminium provides similar mechanical properties to mild steel, making it particularly suitable for aviation and aeronautical applications.
The 3000 series of aluminium are alloyed with manganese; this offers a moderate strength product with good corrosion resistance. 3000 series aluminium can be used at higher temperatures than other series and has good formability. This aluminium/manganese alloy is used for general applications from domestic kitchen equipment manufacture to power plant heat exchangers.
The 4000 Series contains silicon as its alloying element to give it a very low melting point, this gives it excellent properties for using in casting, welding wires, construction panels and extruded products.
The 5000 series of aluminium is alloyed with magnesium and manganese to make it a high strength, non-heat treatable aluminium alloy. This series has very good weldability and good corrosion resistance in marine environments.
The 6000 series is alloyed with manganese and silicon which forms the inorganic compound, magnesium silicide. The magnesium silicide makes this series of aluminium heat treatable. Although the 6000 series of aluminium does not offer the strength properties of the 2000 or 7000 series, it is one of the most versatile aluminium alloys with good formability, medium strength, and good corrosion resistance.
The 7000 series contains the highest strength aluminium alloys available commercially. This series is alloyed mainly with zinc and a small amount of magnesium which enables it to be precipitation hardened. This series is used in the aerospace, automotive and sports equipment manufacture industries due to its suitability to cope with the demands of high stress parts and airframes.
The 8000 series offers similar properties to the 1000 series but with higher strength, better formability, and improved stiffness. It is particularly suited to thin gauge applications. This series is alloyed with iron and nickel to improve strength without losing conductivity.
All grades of aluminium have good to very good corrosion resistance due to a thin layer of aluminium oxide that forms on the surface of the bare metal when it is exposed to the air, this prevents further oxidation. Aluminium is fully recyclable without losing any of its natural qualities.
Prolonged exposure to powdered aluminium or aluminium welding fumes have been reported as being hazardous to health, it is advised if you work with excessive amounts of either of these substances you use appropriate PPE and work within a well-ventilated area. Some users may be prone to contact dermatitis when handling aluminium products, again, appropriate PPE is advised for these individuals.
Aluminium is sensitive to heat, making some workshop processes more complicated; aluminium melts without glowing red hot first and the lower melting point makes it more susceptible to distortion from thermally induced stress relief, these stresses can be relieved and controlled during manufacture by heat treating in an oven, followed by gradual cooling-effectively annealing the stresses.
Cleaning aluminium
Aluminium can be cleaned in a variety of ways, as some alloys can be quite soft it is best to start with the least harsh method and move to harsher treatments only if absolutely necessary. Some abrasive cleaners can change the finish on polished aluminium or presentations with a grain, always use these cleaners gently and clean in the same direction as the grain. After it has been cleaned, wash thoroughly in clear water and dry to prevent streaking.
Recommended processes for cleaning aluminium in order of mildest to harshest.
- Plain water
- Mild soap / detergent
- Solvents such as kerosene, turpentine, or white spirit
- Non-etching chemical cleaner
- Wax-based polish
- Abrasive wax
- Abrasive cleaner
If using proprietary chemical cleaners on aluminium that is used within a food preparation area, please do follow the instructions on the product packaging to ensure it is safe to use in such an environment.
Welding guide
Welding aluminium to | Use filter wire type |
---|---|
Itself | Sifmig 4043, sifalumin 27 5356, sif 555 solder, Hilco Aluminil Si 12, Hilco Aluminil Si 15, sifmig 1050, sifmig 5356, 5183 |
Mild steel | Pre-coat mild steel with sif silver solder 40 or 43 then weld using sifalumin 15 |
Galvanised mild steel | Grind away galvanised surface at weld point then Pre-coat mild steel with sif silversolder 40 or 43 then weld using sifalumin 15 |
Brass | Hilco aluminil Si 12 |
Copper | Hilco aluminil Si 12 |
Stainless steel | Pre-coat stainless steel with sif silver solder 40 or 43 then weld using sifalumin 15 |
Bronze | Sifphosphor bronze no 8 |
Cast iron | Not applicable |
Weldability | Value |
---|---|
Gas | Good |
Arc | Good |
Resistance | Good |
Brazing | Good |
Soldering | Good |
The grades of aluminium
With so many grades of aluminium, here is a guide to each one to help you make the best choice for your project.
Grade 6082
6082 grade is the highest strength of the 6000 series of alloys. 6082 grade Aluminium conforms to BS EN 755-2: 2016 standard. It is classed as a structural alloy and has been seen to replace grade 6061 in many applications due to its high strength. The larger percentage of manganese used in its chemical composition controls the grain structure that results in producing a stronger material.
The T6 suffix is the classification for the type of temper, or degree of hardness, the aluminium has been prepared to during the manufacture process; it represents the metal has been solution heat-treated and artificially aged.
This grade of Aluminium is particularly suitable for the following uses;
- Bridges
- Cranes
- Transport application
- Skips
- Barrels
- Trusses
Properties
Physical Property | Value |
---|---|
Density | 2700 Kg/m3 |
Melting Point | 555°C |
Modulus of Elasticity | 70 GPa |
Electrical Resistance | 0.38 μΩm |
Thermal Conductivity | 180W/m.K |
Thermal Expansion | 23.1 μm/m-k |
Mechanical Property | Value |
---|---|
Yield Strength | 240 N/mm² |
Tensile Strength | 340 N/mm² |
Proof Stress 0.2% | 240 N/mm² |
Shear Modulus | 26 GPa |
Hardness | 104 Vickers - HV |
Elongation (in 200mm) | 8% |
The chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon | Copper | |
---|---|---|---|---|---|
0.40-1.0 | 0.0-0.50 | 0.60-1.2 | 0.70-1.3 | 0.0-0.10 | |
Zinc | Titanium | Chromium | Other | Aluminium | |
0.0-0.2 | 0.0-0.1 | 0.0-0.25 | 0.15 max | Balance |
Machinability
6082 is the most commonly used grade for machining due to its very good machining properties. The T6 temper presentation produces tight coils of swarf when chip breakers are used. Both presentations of the grade are easily drilled at reasonably high machining speeds.
Formability
6082 grade aluminium can be easily formed using standard forming techniques such as rolling, extrusion, die, forging and stretch forming.
Cutting
Can be machine cut, heat cut or cut with a hacksaw or metal shears. The use of sawing coolant or stick wax applied to the saw blade to help with lubrication will improve the finish of the cut and enables cutting at a lower speed to reduce heat generation.
Welding
Before starting to weld aluminium, it is important to clean the base metal to remove any naturally occurring aluminium oxide and hydrocarbon contamination from oils or cutting solvents. Any aluminium oxide left on the surface will inhibit the penetration of the filler metal into the working piece, the oxide will melt at around 110°C while the base metal will melt at around 555°C. Use a stainless-steel brush to remove the oxide, gently working in one direction; care must be taken to not further embed the oxide into the surface by harsh brushing. Aluminium oxide can also be removed by using solvent or etching solution. Use a degreaser to remove any hydrocarbon contamination from oils or cutting solvents; it is important to check the degreaser you choose is hydrocarbon free.
Preheat the aluminium to reduce the risk of the weld cracking, the preheat should not exceed 110°C. Pushing the welding gun away from the weld puddle, rather than a ‘pulling’ action will ensure a better cleaning action, reduce weld contamination, and improve the shielding gas coverage.
Aluminium welding needs to be done ‘fast and hot’; the high thermal conductivity requires a hotter amperage and voltage settings combined with higher weld travel speeds; if the weld is too slow the low melting point of aluminium can lead to‘Burn-through’.Always select welding consumables with a similar melting point to the base metal. The closer the melting range of base metal and welding wire, the easier the weld process will be.
Annealing
The 6082-T6 grade is supplied in a pre-tempered form. If you are intending to use a 6082 grade for a structural application, it is worth considering purchasing 6082-T6.
To anneal 6082-T6 grade aluminium during working, slowly heat to 412°C and maintain temperature for 2-3 hrs, followed by controlled cooling at 10°C per hour until reaching 260° C, then gently air cool.
An alternative way to anneal aluminium is to rub 'bar' soap or marker pen on the metal and apply heat until the soap turns black or the pen marks disappear- this is the point that it has annealed. This is best done carefully, remembering that aluminium does not glow red prior to melting.
Hardening
6082 grade aluminium can be work hardened by rolling, drawing, pressing, and stamping.This reduces ductility and increases strength. 6082-T6 is supplied already age hardened. Age hardening is done by holding aluminium at 177°C for around 8 hrs and then air cooling. Do not quench aluminium in cold water as it may lose its strength and gain brittleness.
To reduce distortion of aluminium castings and forgings or components made from sheet aluminium it is recommended to slow quench in water heated to 65-80°C or forced air blast.
Tempering
6082-T6 is supplied with category T6 temper that identifies it as being solution heat treated and artificially aged during manufacture. To temper standard 6082 grade, heat to 155°C -200° C and soak in water at room temperature for 1 hour per 25mm of thickness. Excessive soaking will nullify the benefits of protectively clad components and increase oxidation.
Corrosion resistance
This grade of aluminium has very good corrosion resistance. The naturally occurring surface oxides protect the metal from further oxidation.
Forging
6082-T6 forges well. Forging heat should remain within the parameters of 300-480°C. It can be cold forged but may become brittle if overworked.
Brazing
Can be brazed using torch, dip and furnace processes.
Process | Rating | |
---|---|---|
Workability - Cold | Good | |
Machinability | Very good | |
Weldability - Gas | Good | |
Weldability - Arc | Good | |
Weldability - Resistance | Very good | |
Brazability | Good |
Forms available
6082-T6 is supplied in angle, angle stair edging, nosing section, z section, round rod/bar square, T section, flat, box and tube in a mill finish.
Flat, tube, angle, box is also available in a bright polish or brushed polish finish
Back to topGrade 6063
6063 grade aluminium conforms to BS EN 573-3 2009 is not suitable for structural applications but is the most common general fabrication grade; it has a better surface finish than 6082 which makes it particularly well suited for use in architectural applications. This grade is supplied in both standard grade presentation and with a T6 temper.
It is suitable for the following applications;
- Window frames
- Doors
- Shop fitting
- Furniture
- Balustrades
- Architectural application
- Irrigation tubing
Properties
Physical Property | Value | |
---|---|---|
Density | 2700 Kg/m3 | |
Melting Point | 600°C | |
Modulus of Elasticity | 69.5 GPa | |
Electrical Resistance | 0.38 μΩm | |
Thermal Conductivity | 200W/m.K | |
Thermal Expansion | 23.5 μm/m-k |
Mechanical Property | Value | |
---|---|---|
Yield Strength | 214 N/mm² | |
Tensile Strength | 195 N/mm² | |
Proof Stress 0.2% | - | |
Shear Modulus | 25.8 GPa | |
Hardness | 83 Vickers - HV | |
Elongation (in 200mm) | 16% minimum |
The chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon | Copper | |
---|---|---|---|---|---|
0.0-0.10 | 0.0-0.35 | 0.45-0.90 | 0.20-0.60 | 0.0-0.10 | |
Zinc | Titanium | Chromium | Other | Aluminium | |
0.0-0.10 | 0.0-0.10 | 0.0-0.10 | 0.0-0.15 | Balance |
Machinability
6063 grade has average to good machinability and can be drilled at quite high speeds. As aluminium does not glow red before melting, it may be necessary to use a cooling system when machining to reduce the risk of spoilage.
Formability
This grade of aluminium can be hot and cold formed with good results
Ductility
Standard grade 6063 has good ductility, 6063 T6 is harder, therefore, is less ductile.
Cutting
Can be cut by machine, flame cut or cut with a hacksaw or metal shears. The use of a proprietary sawing coolant or stick wax on the saw blade will help with lubrication to improve the finish of the cut and enables cutting at a lower speed to reduce heat generation.
Welding
6063 and 6063 T6 can be successfully welded by all conventional methods. Filler rod used should be of the same alloy, 5183, or AL4043. Thoroughly clean the base metal of any hydrocarbon contamination from oils or cutting solvents and naturally occurring aluminium oxide before welding. Any aluminium oxide remaining on the surface will block the penetration of the filler metal into the piece being welded. Aluminium oxide can be removed using mild solvents or etching solution and it is also recommended to use a degreaser to remove any hydrocarbon contamination prior to welding.Using a stainless-steel brush in one direction along the part to be welded can also remove aluminium oxide before welding; take care to not embed the oxide into the surface by brushing too hard. Preheating should not exceed 110°C and will reduce the risk of the weld cracking.
Moving the welding gun away from the weld puddle, rather than a more usual ‘pulling’ action will, reduce contamination, ensure better cleaning, and greatly improve the shielding gas coverage. The high thermal conductivity means that welds need to be performed ‘fast and hot’; a hotter amperage and voltage settings combined with higher weld travel speeds are required. If the weld process is too slow, the low melting point of aluminium can lead to ‘Burn-through’.
The closer the melting range of base metal and welding wire, the easier the weld process will be, so always select welding consumables with a similar melting point to the base metal
Annealing
The 6063-T6 grade is supplied in a pre-annealed form. To anneal 6063 grade aluminium during working, slowly heat to 413° C and maintain temperature for 2-3 hrs, followed by controlled cooling at 50°C per hour until reaching 260° C, then gently air cool
Hardening
6063 can be hardened through the process of artificial aging. T6 profiles have been pre-aged during the manufacturing process; to artificially age standard 6063 to T6 and T62 temper, hold the metal at a constant 177° C for 8 hours. Artificially age standard 6063 to T5 temper by holding at 182°C for 3 hours. Hardening can also be achieved by cold working.
Tempering
6063-T6 is supplied with category T6 temper that determines the aluminium has been solution heat treated and artificially aged during manufacture. To temper standard 6063, heat to 155°C -200° C and soak in water at room temperature for 1 hour per 25mm of thickness. Excessive soaking can cancel the benefits of protectively clad components and increase oxidation.
Corrosion resistance
6063 and 6063 T6 have very good corrosion resistance. This is enhanced by naturally occurring surface oxidation.
Forging
Hot forging can be done within the temperature range of 260° C to 510° C
Brazing
6063 can be successfully brazed by torch, dip, and furnace processes within the hot working temperature ranges of 260°C to 510°C. The filler metal will also require a lower melting temperature than the 6063 and the metal being joined.
Anodising
Aluminium is anodised by an electrochemical process comparable to galvanising mild steel and offers similar benefits. Satin anodised coatings increase resistance to corrosion, increase surface hardness and improves the appearance of the aluminium which is beneficial for some more decorative applications. Anodising does not increase the strength of the base metal but makes the surface more resistant to wear and corrosion. This anodised surface layer has lower thermal conductivity and coefficient of linear thermal expansion than the base metal which may lead to thermal stress cracking if exposed to temperatures exceeding 80°C.
Aluminium is anodised by submerging the piece in an acid solution and passing an electrical current through the electrolytic solution. The aluminium acts as the ‘anode’ (positive electrode) and the electrical current releases hydrogen at the cathode (negative electrode) and oxygen at the surface of the anode or aluminium piece. This creates a build-up of aluminium oxide far exceeding that created naturally. The acid slowly dissolves the surface aluminium oxide, this creates nanopores on the surface which enables the acid and the electrical current to penetrate through to the aluminium substrate. Sulfuric acid anodising is the most commonly used technique due to its good ability to produce an anodised surface of uniform, moderate thickness.
When welding, drilling, or machining anodised parts, it is worth remembering that the improved corrosion resistance will be lost on cut and weld lines. These areas will benefit from using a metal paint spray or surface treatment to reinstate corrosion protection at
Process | Rating |
---|---|
Workability - Cold | Average |
Machinability | Average |
Weldability - Gas | Excellent |
Weldability - Arc | Excellent |
Weldability - Resistance | Excellent |
Brazability | Excellent |
Solderability | Good |
Forms available
We supply 6063 in both angle and box profile and grade 6063 T6 in flat, channel, tube, moulding, and wall board lining section.
We also supply 6063 T6 flat, angle, channel, and wall board lining section in an anodised satin finish.
Back to topGrade 1050A H14
1050A -H14 grade aluminium conforms to the BS EN 573-3 Standard.
1050A grade can be successfully used in general engineering, industrial and some marine environments- if using in more hostile marine environments, the use of grade 5251 may be more suitable due to its greater corrosion resistance.
The ‘H14’ relates to the sheet being strain/ work hardened to ‘half hard’ temper designation and is not annealed after rolling. 1050A H14 is a non heat treatable, rolled aluminium sheet for general sheet metal work where high mechanical properties are not required. It is particularly suitable for the following applications;
- Boiler making
- Kitchenware
- Pharmaceutical industry
- Security
- Vehicle lining and panelling
- Inspection covers
- Chemical industry
- Trailers
- Building
Properties
Physical Property | Value |
---|---|
Density | 2700 Kg/m3 |
Melting Point | 600°C |
Modulus of Elasticity | 69.5 GPa |
Electrical Resistance | 0.38 μΩm |
Thermal Conductivity | 200W/m.K |
Thermal Expansion | 23.5 μm/m-k |
Mechanical Property | Value |
---|---|
Yield Strength | 214 N/mm² |
Tensile Strength | 195 N/mm² |
Proof Stress 0.2% | - |
Shear Modulus | 25.8 GPa |
Hardness | 83 Vickers - HV |
Elongation (in 200mm) | 16% minimum |
The chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon | Copper | |
---|---|---|---|---|---|
0.0-0.05 | 0.0-0.40 | 0.0-0.05 | 0.0-0.02 | 0.0-0.05 | |
Zinc | Titanium | Other | Aluminium | ||
0.0-0.10 | 0.0-0.05 | 0.0-0.03 | Balance |
Machinability
1050-H14 has poor to fair machining qualities as it is a soft alloy. The H14, half hard temper does increase the hardness but compared to harder aluminium bases, this grade could not be described as free chipping
Formability
This grade of aluminium sheet has good cold formability; it is a very suitable grade when bending or spinning is required.
Ductility
This aluminium grade has high ductility.
Cutting
It is recommended to use aluminium cutting tools at a ‘reasonable’ speed to avoid the edge build up that can happen if running at low cutting speeds; the use of high-speed steel tools may be more suitable, particularly with the possible large rake angle on machines that cannot reach carbide cutting speeds.
Welding
1050-H14 is easy to weld using all standard welding techniques. When welding 1050 to itself or an alloy from the same subgroup, the recommended filler wire is 1100 or if welding to other alloys AL4043 is the recommended choice. A good weld will have the strength of up to 65Mpa. The high thermal conductivity of 1050A means welds are best completed in as ‘fast and hot’ process; preheating should not exceed 110°C and will help reduce the risk of the weld cracking. Moving the welding gun away from the weld puddle, rather than the conventional ‘pulling’ action will reduce contamination, ensure better cleaning, and greatly improve the shielding gas coverage. A hotter amperage and voltage settings combined with higher weld travel speeds are required to reduce the risk of ‘burn-through’.
Annealing
1050A-H14 can be successfully worked without the need for annealing. Due to the lack of suitability of this grade for heat treatment, and the amount of stretching and shrinkage possible while working before requiring annealing, most projects can be undertaken without the necessity to anneal.
Hardening
This grade is not suitable for heat treatment but can be work hardened. The H14 specification means that the metal has been supplied already work/strain hardened
Tempering
1050A-H14 is supplied in a half hard temper presentation.
Corrosion resistance
This grade has excellent corrosion resistant qualities.
Process | Rating |
---|---|
Workability - Cold | Excellent |
Machinability | Poor |
Weldability - Gas | Excellent |
Weldability - Arc | Excellent |
Weldability - Resistance | Excellent |
Brazability | Excellent |
Solderability | Excellent |
Forms available
We supply 1050A H14 grade aluminium in mill finish sheet and stucco sheet.
Back to topGrade 1050H24
1050-H24 grade aluminium is a magnesium alloy, it is ‘non heat treatable’ and can be strengthened by strain hardening or cold working. The H24 temper designation denotes that the metal has been work hardened and partially annealed during manufacture to a strength around half-way between full hard (H28) and annealed (0)
1050 -H24 grade aluminium has excellent anti rust and corrosion resistance properties including within marine type environments; the 5-bar raised pattern presentation is recommended for use as anti-skid flooring, applications in vehicle bodies, walkways, treadplate, floors on boats, anti-scuff panels along corridors, and wall panels.
Properties
Physical Property | Value |
---|---|
Density | 2700 Kg/m3 |
Melting Point | 640°C |
Modulus of Elasticity | 69 GPa |
Electrical Resistance | 0.38 μΩm |
Thermal Conductivity | 200W/m.K |
Thermal Expansion | 23.5 μm/m-k |
Mechanical Property | Value |
---|---|
Yield Strength | 75 N/mm2 |
Tensile Strength | 105-145 N/mm2 |
Proof Stress 0.2% | 75 N/mm2 |
Shear Modulus | 26 GPa |
Hardness | 33 (Vickers) |
Elongation (in 200mm) | 3-8 % |
Chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon | Copper |
---|---|---|---|---|
0-0.05 | 0-0.4 | 0-0.05 | 0-0.25 | 0 -0.03 |
Zinc | Titanium | Other | Aluminium | |
0-0.03 | 0-0.025 | 0-0.03 | Balance |
Machinability
1050 -H24 has poor machinability, as this grade is supplied as treadplate, applications requiring machining are not appropriate
Ductility
This grade has high ductility
Cutting
1050 -H24 can be cut with easily with standard hand or machine saw techniques. Use aluminium cutting tools set to a ‘reasonable’ speed to avoid build-up of swarf at the cut edges that can accumulate if running at lower cutting speeds. High-speed steel tools with a large rake angle may be more suitable for use on machines that do not reach carbide cutting speeds.
Welding
1050-H24 is easy to weld using all standard welding techniques with a good weld reaching strengths of up to 65Mpa.
Welding 1050 H24 to an alloy from the same subgroup or itself the recommended filler wire is 1100; if welding to other alloys the recommended choice is AL4043.
Welds are best completed by a ‘fast and hot’ process due to the high thermal conductivity of 1050 H24. To help reduce the risk of the weld cracking, preheating should not exceed 110°C. It is recommended to use a hotter amperage and voltage settings combined with higher weld travel speeds to reduce the risk of ‘burn-through’.
Annealing
This grade can be successfully worked without annealing. The lack of suitability for heat treatment and the amount of stretch and shrink possible with cold working processes ensures projects can be undertaken without the necessity to anneal.
Hardening
1050 H24 is a fully bendable grade that has been developed to not split or crack during folding, this makes it excellent for cold working but is not suitable for heat hardening.
Tempering
1050 -H24 has been strain/ work hardened during the sheet production process.
Corrosion resistance
This grade has high corrosion resistance and anti-rust properties in both ‘normal’ and marine environments.
Process | Rating |
---|---|
Workability - Cold | Excellent |
Machinability | Poor |
Weldability - Gas | Excellent |
Weldability - Arc | Excellent |
Weldability - Resistance | Excellent |
Brazability | Excellent |
Forms available
mill finish tread plate with a 5-bar pattern finish to ensure pleasing aesthetics and grip.
Back to topGrade 3003
3003 H224 grade conforms to the BS EN 573-3 2013 standard.
3003 grade aluminium is a general-purpose aluminium with moderate strength, very good workability, weldability, and corrosion resistance. This grade is usually rolled and extruded and can be cold worked but not hot forged, heat treated or used in casting. This grade is typically used in sheet metal applications such as roofing, gutters, vehicle, and trailer floors, protecting walls, slip resistant floor and stair protection.
The H224 designation refers to the type of temper. H224 shows the treadplate has been produced from a base grade 3003 with a H21 temper; this is strain/work hardened and partially annealed. Patterned or embossed sheet from this temper is assigned the standardised number H224 to aid the classification of processing through manufacture
- Roofing
- Gutters
- Vehicles
- Trailer floors
- Stair protection
- Wall protection
- Anti-slip flooring
Properties
Physical Property | Value |
---|---|
Density | 2730 Kg/m3 |
Melting Point | 655°C |
Modulus of Elasticity | 69.5 GPa |
Electrical Resistance | 0.34 μΩm |
Thermal Conductivity | 190W/m.K |
Thermal Expansion | 23.1 μm/m-k |
Mechanical Property | Value |
---|---|
Yield Strength | 214 N/mm² |
Tensile Strength | 110 N/mm² |
Proof Stress 0.2% | 50 N/mm² |
Shear Modulus | 75 GPa |
Hardness | 29 Vickers - HV |
Elongation (in 200mm) | 25% minimum |
The chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon |
---|---|---|---|
1.10-1.50 | 0.70 max | 0.05 max | 0.60 max |
Copper | Zinc | Other | Aluminium |
0.0.05-0.20.10 | 0.10 max | 0.15 max | Balance |
Machinability
This grade has average machinability.
Ductility
3003 grade aluminium has good ductility.
Cutting
This grade can be easily cut with shears or hand or machine saw.
Welding
3003 H224 has very good arc and oxy welding suitability with excellent results with resistance welding. When welding 3003 H224 to itself or other alloys in the same series, the recommended filler wire is 1100, alternatively, if welding to other alloys, AL4043 or AL 4047 are the recommended fillers. Pre-weld preheating should not exceed 110°C to help prevent weld cracking and welds should be performed with a higher amperage, and quick weld passes, to prevent burn-through.
Annealing
This grade can be successfully cold worked without the need for annealing, although, annealing after cold working is possible by heating the piece to 415°C until uniform temperature throughout and then air cooling.
Hardening
3003 grade aluminium is not suitable for hardening by heat treatment but can be hardened by cold working. 3003 is easy to cold work and form. The H224 temper designation shows the product has been strain hardened and partially annealed during production.
Tempering
This grade is supplied in a quarter hard temper presentation.
Corrosion resistance
Very good to excellent corrosion resistance.
Forging
Treadplate is suitable for cold forging, but not recommended for hot forging.
Brazability
This grade of aluminium sheet can be brazed with an appropriate filler; however, welding will produce a stronger joint.
Anodising
This grade of aluminium has good anodising qualities.
Process | Rating |
---|---|
Workability - Cold | Very good |
Machinability | Average |
Weldability - Gas | Very good |
Weldability - Arc | Very good |
Weldability - Resistance | Excellent |
Formability - Cold | Excellent |
Anodising Qualities | Rating |
---|---|
Protective | Good |
Colour | Good |
Bright | Poor |
Hard | Good |
Forms available
We supply 3003 H224 in mill finish ‘treadbrite’ sheet. This product is also known as Propeller Plate due to the distinctive raised surface detail that is similar to an aeroplane propeller profile.
Back to topGrade 5754 H111
5754-H111 grade conforms to the BS EN 573-3 standard.
5754 grade aluminium is a magnesium alloy, it is classed as being ‘non heat treatable’ and is strengthened by cold working or strain hardening. The H111 designation of temper denotes that some work hardening is imparted by the shaping processes during manufacture, but less than required for a H11 temper.
5754 grade aluminium has excellent corrosion resistance making it an ideal grade for use in sea water and industrially polluted environments.
Typical uses for this 5-bar pattern sheet presentation of 5754 grade is; treadplate, applications in marine, gas, chemical and nuclear market sectors, shipbuilding, food processing equipment, Vehicle bodies. Walkways and floors on boats
- Treadplate
- Marine
- Gas
- Chemical and nuclear
- Shipbuilding
- Vehicle bodies
- Walkways
- Floor
Properties
Physical Property | Value |
---|---|
Density | 2660 Kg/m3 |
Melting Point | 600°C |
Modulus of Elasticity | 68 GPa |
Electrical Resistance | 0.49 μΩm |
Thermal Conductivity | 147W/m.K |
Thermal Expansion | 24 μm/m-k |
Mechanical Property | Value |
---|---|
Yield Strength | - |
Tensile Strength | 245-290 N/mm² |
Proof Stress 0.2% | 185-245 N/mm² |
Shear Modulus | 68 GPa |
Hardness | - |
Elongation (in 200mm) | 10-15% minimum |
The chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon | Copper |
---|---|---|---|---|
0.0-0.50 | 0.0-0.40 | 2.60-3.60 | 0.0-0.40 | 0.0-0.10 |
Zinc | Titanium | Chromium | Other | Aluminium |
0.0-0.20 | 0.0-0.15 | 0.0=0.30 | 0.0-0.15 | Balance |
Machinability
5754-H111 has less than average machinability.
Ductility
This grade has poor to average ductility.
Cutting
5754 can be cut with easily with standard hand or machine saw techniques.
Welding
This product is suitable for gas, arc and resistance welding. The higher magnesium content of the base metal requires a filler alloy with more magnesium than the base metal to ensure weld strength and similar corrosion resistance at the weld; 5356 is the most commonly selected filler metal/rod for this grade.
Pre-weld preheating should not exceed 110°C to help prevent weld cracking stress corrosion cracking.
Due to the high thermal conductivity of aluminium, welds should be performed with a higher amperage, and quick weld passes, to prevent ‘burn through’; this is particularly a risk when working with sheet products.
Annealing
5754-H111 can be successfully worked without the need for annealing. Due to the lack of suitability of this grade for heat treatment, and the amount of stretching and shrinkage possible with cold working processes, most projects can be undertaken without the necessity to anneal.
Hardening
This grade of sheet is not suitable for heat hardening. It is excellent for cold working. It is a fully bendable grade that has been developed to not split or crack during folding.
Tempering
5754-H111 has been strain/ work hardened during the sheet production process. It is defined as being quarter hard.
Corrosion resistance
This grade is highly resistant to seawater and industrial chemicals, due to this high level of corrosion resistance it is sometimes referred to as ‘marine grade’.
Forging
Very good results are possible with cold forging, hot forging is not appropriate for this product.
Brazing
This product has poor brazing qualities.
Anodising
Grade 5754 aluminium has excellent suitability for all types of anodising and powder coating processes. It can also be polished to provide a bright, mill or dull finish as required to suit your project.
Process | Rating |
---|---|
Workability - Cold | Excellent |
Machinability | Average |
Weldability - Gas | Very good |
Weldability - Arc | Very good |
Weldability - Resistance | Excellent |
Brazability | Poor |
Formability - Cold | Very good |
Anodising Qualities | Rating |
---|---|
Protective | Good |
Colour | Good |
Bright | Good |
Hard | Good |
Forms available
We supply 5754-H111 grade in mill finish tread plate with a 5-bar pattern finish to ensure grip and good aesthetics.
Back to topGrade 5994 H145
Telescopic tube is made from 5449 grade aluminium and is supplied with a H145 temper. This aluminium alloy has medium strength levels and very good corrosion resistance, even in marine environments. This grade of aluminium is non heat treatable. Telescopic tubes can be used singly but are most often used in multiples of varying sizes to create repeatedly adjustable length tubes for a range of applications. Aluminium telescopic tubing is particularly suitable for adjustable table and bar counter legs, shower curtain rails, supports, railings, camera tripods and reflecting telescope construction.
Telescopic tubes can be fixed into position by using tube adjusters, these are manufactured in durable nylon and are easily adjusted with a simple ‘thumb screw’ mechanism.
- Table legs
- Curtain rails
- Support
- Railings
- Camera tripods
- Telescopes
Properties
Physical Property | Value |
---|---|
Density | 2800 Kg/m3 |
Melting Point | 650°C |
Modulus of Elasticity | 69 GPa |
Electrical Resistance | - |
Thermal Conductivity | - |
Thermal Expansion | 23 μm/m-k |
Mechanical Property | Value |
---|---|
Yield Strength | - |
Tensile Strength | - |
Proof Stress 0.2% | - |
Shear Modulus | 26 GPa |
Hardness | - |
Elongation (in 200mm) | 17% max |
The chemical composition (% weight )
Manganese | Iron | Magnesium | Silicon | Copper |
---|---|---|---|---|
0.6-1.10 | 0.70 max | 1.60-2.60 | 0.40 max | 0.30 max |
Zinc | Titanium | Chromium | Other | Aluminium |
0.30 max | 0.10max | 0.30max | 0.15 max | Balance |
Machinability
Can be machined if required, although the profile of this product would not necessarily require machining.
Ductility
Has reasonable ductility and is suitable for bending.
Cutting
This product can be cut by using hand or machine cutting techniques.
Welding
Telescopic tubes can be welded by gas, arc or resistance welding techniques with very good to excellent results.
Annealing
As this grade is not suitable for heat treatment, it can be successfully worked without the need for annealing.
Hardening
Cold working or strain hardening are suitable processes for this grade of aluminium, however, the profile presentation would usually not require hardening processes to be applied.
Tempering
This grade of telescopic tube is supplied as a H145 temper presentation.
Corrosion resistance
EN AW 5449 has excellent corrosion resistance, including within seawater and harsh marine environments.
Forging
5449A can be forged by pressing and stamping techniques, although care should be taken to not compromise the precision diameter as this will affect the smooth glide of the tube lengths when elongating or shortening the fixings.
Brazing
This product is suitable for brazing using the appropriate consumables.
Process | Rating | |
---|---|---|
Machinability | Average | |
Weldability - Gas | Good | |
Weldability - Arc | Very good | |
Weldability - Resistance | Very good | |
Formability - Cold | Good |
Anodising Qualities | Rating |
---|---|
Protective | Good |
Colour | Good |
Bright | Average |
Hard | Good |
Forms available
We supply 5754-H111 grade in mill finish tread plate with a 5-bar pattern finish to ensure grip and good aesthetics.
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