Copper Alloys

Commercial Bronze

Application & Characteristics 
Marine hardware, primer caps and base for vitreous enamel in costume jewellery.
Chemical Composition (%)
Cu90; Zn 10
Physical Properties
Melting Range (°F)1870 – 1910
Density (lbs/in³) 68F0.318
Thermal Expansion (in/in °Fx10 to the power of -6)10.2 (68-572F)
Electrical Resistivity (ohms/cir mil/ft.) 68F23.6
Mechanical Properties – Temper = A
Tensile Strength (psi x 10³)37
Yield Strength (psi x 10³)10
Elongation ( % )45
HardnessF53(Rockwell)
Mechanical Properties – Temper = H
Tensile Strength (psi x 10³)61
Yield Strength (psi x 10³)54
Elongation ( % )5
HardnessB70(Rockwell)

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