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Cast copper alloy C90500 (Gun Metal)

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Cast copper alloy C90500 (Gun Metal)
Chemical composition: Sn=10.0%, Zn=2.0%, Cu=88%
Property Value in metric unit Value in US unit
Density 8.72 *10³ kg/m³ 544 lb/ft³
Modulus of elasticity 103 GPa 15000 ksi
Thermal expansion (20 ºC) 19.8*10-6 ºCˉ¹ 11.0*10-6 in/(in* ºF)
Specific heat capacity 377 J/(kg*K) 0.090 BTU/(lb*ºF)
Thermal conductivity 74.8 W/(m*K) 518 BTU*in/(hr*ft²*ºF)
Electric resistivity 15.6*10-8 Ohm*m 15.6*10-6 Ohm*cm
Tensile strength (sand cast) 310 MPa 45000 psi
Yield strength (sand cast) 152 MPa 22000 psi
Elongation (sand cast) 25 % 25 %
Fatigue strength (sand cast) 90 MPa 13000 psi
Hardness (sand cast) 75 HB(500) 75 HB(500)
Liquidus temperature 999 ºC 1830 ºF
Solidus temperature 854 ºC 1570 ºF

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to Cast tin bronzes and leaded tin bronzes
to Properties of copper alloys