Aluminium 5083 Alloy

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Aluminium 5083 Alloy

Aluminium 5083 Alloy

This is an aluminium alloy with magnesium and a very small amount of manganese and chromium. It has a high resistance to corrosion by seawater and chemicals.

Alloy 5083 retains excellent strength after welding. It has the highest strength of the non-heat treatable alloys it has an Ultimate Tensile Strength of 317 MPa or 46000 psi and a Tensile Yield Strength of 228 MPa or 33000 psi. It is not the chosen alloy for use in temperatures in excess of 65 °C

Alloy also is known as

Alloy 5083 can also be referred to as the following grades and specifications but they may not always be a direct equivalent.

GM41

A95083

AlMG4.5Mn

Fabrication

Work-ability – Cold: Average

Maintainability: Poor

Temper Types

The most common tempers for 5083 aluminium are:

  • O - Soft
  • H111
  • H32

 

 

Weldability

Weldability

When welding 5083 to itself or another alloy from the same group, the recommended filler metal is 5183. Other suitable fillers are 5356 and 5556.

Weldability – Gas: Average

Weldability – Arc: Excellent

Weldability – Resistance: Excellent

Brazability: Poor

Solderability: Poor

 

Chemical Composition

5083 Alloy

Chemical Element % Present
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) 0.05 - 0.25
Other (Each) 0.0 - 0.05
Others (Total) 0.0 - 0.15
Aluminium (Al) Balance

 

Properties

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

 

Plate - 6.3mm to 80mm

Mechanical Property Value
Proof Stress 115 Min MPa
Tensile Strength 270 - 345 MPa
Hardness Brinell 75 HB

 

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 %