C94700 Nickel-tin bronze +leaded nickel-tin bronze B 584
(CENT, INVEST, SAND)
Copper Alloy UNS Number.：C94700
Previous Designation：B 292-A
Commercial Designation: nickel-tin bronze Grade “A”
Chemical Requirements（Composition，% Max Except as Indicated）
Major Elements：
Copper：85.0~90.0
Tin：4.5~6.0
Lead: 0.10
Zinc: 1.0~2.5
Iron: 0.25
Nickelincl.Cobalt: 4.5~6.0
Antimony: 0.15
Manganese:0.20
Residual Elements
Sulfur: 0.05
Phosphorus: 0.05
Aluminum: 0.005
Silicon: 0.005
Mechanical Requirements
Tensile Strength,min
ksi: 45 C94700 (HT):75
MPa: 310 (HT):517
Yield Strength, min
ksi: 20 (HT):50
MPa: 138 (HT):345
Elongation in 2 in.or 50 mm, min, %: 25 C94700(HT):5
Heat Treatments
Solution treatment (not less than 1 h followed by water quench): 1425–1475°F
(775–800°C)
Annealing Treatment(not less than 2 h followed by air cool): 580–620°F
(305–325°C)
Keywords
copper alloy castings; copper-base alloy castings; sand castings