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Wrought copper alloy C28000 (Muntz Metal)

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Wrought copper alloy C28000 (Muntz Metal)
Chemical composition: Zn=40%, Cu=60%
Property Value in metric unit Value in US unit
Density 8.39 *10³ kg/m³ 524 lb/ft³
Modulus of elasticity 103 GPa 15000 ksi
Thermal expansion (20 ºC) 20.9*10-6 ºCˉ¹ 11.6*10-6 in/(in* ºF)
Specific heat capacity 377 J/(kg*K) 0.090 BTU/(lb*ºF)
Thermal conductivity 123 W/(m*K) 852 BTU*in/(hr*ft²*ºF)
Electric resistivity 6.15*10-8 Ohm*m 6.15*10-6 Ohm*cm
Tensile strength (annealed) 372 MPa 54000 psi
Yield strength (annealed) 145 MPa 21000 psi
Elongation (annealed) 45 % 45 %
Shear strength (annealed) 276 MPa 40000 psi
Hardness (annealed) 46 R30T 46 R30T
Tensile strength (cold work) 483 MPa 70000 psi
Yield strength (cold work) 345 MPa 50000 psi
Elongation (cold work) 10 % 10 %
Shear strength (cold work) 303 MPa 44000 psi
Hardness (cold work) 67 R30T 67 R30T
Annealing temperature 425-600 ºC 800-1100 ºF
Liquidus temperature 905 ºC 1660 ºF
Solidus temperature 900 ºC 1650 ºF

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