Copper Based Alloys

Copper Based Alloys: to BS 1400
Grade Type
Tensile Strength
N/mm2
0.2% Proof
N/mm2
Typical Hardness HB Elongation (%)
Aluminium Bronze AB1 550 200 130 18
Aluminium Bronze AB2 650 280 150 12
Gunmetal G1 270 130 85 16
Gunmetal LG2 230 110 65 10
Gunmetal LG4 240 130 70 12
Phosphor Bronze PB1 270 170 80 10
Leaded Phosphor Bronze LPB1 190 80 70 3
Lead Bronze LB2 220 110 65 5
Silicon Brass SCB3 180 70 45 12
High Tensile Brass HTB1 480 200 110 18

Castable Copper-based alloys are very versatile to the engineering designer and offer a number of benefits over other metals. Good corrosion resistance being noble in the comparative electrochemical series, couple with bio-fouling resistance, mean that the application range can vary from plumbing fixtures, impellers, propellers and pumps to bearings, valves and building products such as the AATi stair nosing treads.

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