Aluminium 5083 Plate

What is 5083 Plate?

Aluminium plate made with grade 5083 is produced with magnesium as the primary alloying element; it may also contain chromium, manganese, silicon, iron, zinc, and other elements in trace amounts. 

5083 is renowned for its excellent performance in harsh and hostile environments, making it ideal for use in industrial, chemical, and marine applications. 

This grade can also retain outstanding levels of strength after welding to maintain the maximum strength of this non-heat treatable alloy, however, use in temperatures exceeding 65°C is not advised. This alloy can also be used in cryogenic applications as it is capable of being cooled to -195°C without affecting its mechanical properties.


Chemical Composition

Spec: BS EN 573-3:2019

Alloy 5083

Chemical Element % of weight 

Manganese (Mn) 0.40 - 1.00

Iron (Fe) 0.40 max

Copper (Cu) 0.10 max

Magnesium (Mg) 4.00 - 4.90

Silicon (Si) 0.0 - 0.40

Zinc (Zn) 0.0 - 0.10

Chromium (Cr) 0.05 - 0.25

Titanium (Ti) 0.15 max

Other (Each) 0.0 - 0.05

Others (Total) 0.0 - 0.15

Aluminium (Al) Balance

Mechanical Properties

Physical Property       Value

Density                                265 g/cm³

Melting Point                    570 °C

Thermal Expansion    25 x10^-6 /K

Modulus of Elasticity   72 GPa

Thermal Conductivity  121 W/m.K

Electrical Resistivity     0.058 x10^-6 Ω .m


Spec: BS EN 485-2:2008

Plate - 6.3mm to 80mm

Mechanical Property Value

Proof Stress                      115 Min MPa

Tensile Strength              270 - 345 MPa

Hardness Brinell             75 HB


Spec: BS EN 485-2:2008

Plate - 80mm to 120mm

Mechanical Property Value

Proof Stress                      110 Min MPa

Tensile Strength              260 Min MPa

Hardness Brinell             70 HB

Elongation A                      12 Min %

Mechanical Properties shown are for 0/H111 temper


What is it used for? 

Due to its high levels of welding strength and corrosion resistance, 5083 alloy is used in a wide array of applications. These include aircraft, automotive, and marine components, tanks for storing oil and liquefied natural gas, pressure vessels up to a maximum temperature of 65 °C, tip up truck and other vehicle bodies, electrical enclosures, ship building, railway carriages, missile parts and even communications towers. 5083 grade aluminium is also a suitable alloy for successful anodising to provide increased protection against corrosion and wear


Can it be machined or welded?

The recommended filler for welding this grade to itself, or another alloy from the same subgroup, is 5183. 5356 and 5556 are also suitable fillers for 5083. This makes 5083 a popular choice for complex projects.

Weldability – Gas: Average

Weldability – Arc: Excellent

Weldability – Resistance: Excellent

Brazability: Poor

Solderability: Poor


Workability – Cold: Average

Machinability: Poor


How does it compare to other aluminium grades?

Aluminium 5083 is a medium strength magnesium-manganese-chromium-aluminium alloy. This increases the strength and corrosion resistance of the grade when compared to 6082 alloy, which has three times less magnesium.  

5083 has better formability compared to many 6000 series alloys which makes it suitable to be used to create moulds. The 5000 series grades of aluminium are non heat-treatable alloys, unlike the 6000 series grades, which can be heat treated. The profile range of 5083 is restricted compared to 6082 grade for example, however, 5083 does have a better ductility in terms of strength properties when compared to the majority of the 5000 series aluminium alloys.