Cast Copper Alloy C91700 (Nickel Gear Bronze) - SubsTech

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Cast copper alloy C91700 (Nickel Gear Bronze)
Chemical composition: Sn=11.9%, Ni=1.6%, Cu=86.5%
Property Value in metric unit Value in US unit
Density 8.75 *10³ kg/m³ 546 lb/ft³
Modulus of elasticity 103 GPa 15000 ksi
Thermal expansion (20 ºC) 16.2*10-6 ºCˉ¹ 9.0*10-6 in/(in* ºF)
Specific heat capacity 377 J/(kg*K) 0.090 BTU/(lb*ºF)
Thermal conductivity 70.6 W/(m*K) 490 BTU*in/(hr*ft²*ºF)
Electric resistivity 17.2*10-8 Ohm*m 17.2*10-6 Ohm*cm
Tensile strength (sand cast) 303 MPa 44000 psi
Yield strength (sand cast) 152 MPa 22000 psi
Elongation (sand cast) 16 % 16 %
Hardness (sand cast) 85 HB(500) 85 HB(500)
Tensile strength (perm. mold) 414 MPa 60000 psi
Yield strength (perm. mold) 221 MPa 32000 psi
Elongation (permanent mold) 16 % 16 %
Hardness (permanent mold) 106 HB(500) 106 HB(500)
Liquidus temperature 1015 ºC 1859 ºF
Solidus temperature 851 ºC 1563 ºF

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