C90300 Tin bronze + leaded tin bronze B 584
(CENT, INVEST, SAND)
Copper Alloy UNS Number.：C90300
Previous Designation：B 143-1B
Commercial Designation: modified “G” bronze, 88-8-0-4
Chemical Requirements（Composition，% Max Except as Indicated）
Major Elements：
Copper：86.0~89.0
Tin：7.5~9.0
Lead:0.30
Zinc: 3.0~5.0
Iron: 0.20
Nickelincl.Cobalt: 1.0
Antimony: 0.20
Residual Elements
Sulfur: 0.05
Phosphorus: 0.05
Aluminum: 0.005
Silicon: 0.005
Mechanical Requirements
Tensile Strength,min
ksi: 40
MPa: 276
Yield Strength,ᴬ min
ksi: 18
MPa: 124
Elongation in 2 in.or 50 mm, min, %: 20
Keywords
copper alloy castings; copper-base alloy castings; sand castings