Background

Aluminium 5083 is known for exceptional performance in extreme environments. 5083 is highly resistant to attack by both seawater and industrial chemical environments. Alloy 5083 also retains exceptional strength after welding. It has the highest strength of the non-heat treatable alloys but is not recommended for use in temperatures in excess of 65°C.

Chemical Composition

Table 1. Typical chemical composition for aluminium alloy 5083 Element % Present Si 0.4% Fe 0.4% Cu 0.1% Mn 0.4-1.0% Mg 4.0-4.9% Zn 0.25% Ti 0.15% Cr 0.05-0.25% Al Balance

Properties Mechanical Properties Table 2. Typical mechanical properties for aluminium alloy 5083 Temper H32 0/H111 Proof Stress 0.2% (MPa) 240 145 Tensile Strength (MPa) 330 300 Shear Strength (MPa) 185 175 Elongation A5 (%) 17 23 Hardness Vickers (HV) 95 75 Physical Properties Table 3. Typical physical properties for aluminium alloy 5083 Property Value Density 2.65 g/cm3 Melting Point 570°C Modulus of Elasticity 72 GPa Electrical Resistivity 0.058x10-6 Ω.m Thermal Conductivity 121 W/m.K Thermal Expansion 25x10-6 /K Alloy Designations Alloy 5083 also corresponds to the following standard designations and specifications: Al Mg4.5Mn0.7 AlMg4.5Mn GM41 A95083 Fabrication Welding When welding 5083 to itself or another alloy from the same sub-group, the recommended filler metal is 5183. Other suitable fillers are 5356 and 5556. Fabrication Response Table 4. Typical fabrication response for aluminium alloy 5083 Process Rating Workability – Cold Average Machinability Poor Weldability – Gas Average Weldability – Arc Excellent Weldability – Resistance Excellent Brazability Poor Solderability Poor Temper The most common tempers for 5083 aluminium are: · 0 – Annealed wrought alloy · H111 – Some work hardening imparted by shaping processes but less than required for a H11 temper. · H32 – Work hardened and stabilised with a quarter hard temper.

Applications Alloy 5083 is typically used in: · Shipbuilding · Rail cars · Vehicle bodies · Tip truck bodies · Mine skips and cages · Pressure vessels

Supplied Forms

Alloy 5083 is generally supplied as a flat rolled product in plate form.