Component manufacture video
Metal Properties

Phosphor Bronze, Grade A

 
Application & Characteristics
Bourdon tubing and spirals, bellows, fasteners, sleeve bushings and electrical parts. Resists corrosion and fatigue due to flexing.
 
Chemical Composition (%)
Cu 95; Sn 5; P 0.20
 
Physical Properties
Melting Range (°F) 1750 – 1920
Density (lbs/in³) 68F 0.320
Thermal Expansion (in/in °Fx10 to the power of -6) 9.9
Electrical Resistivity (ohms/cir mil/ft.) 68F 69.1
 
Mechanical Properties – Temper = A
Tensile Strength (psi x 10³) 47
Yield Strength (psi x 10³) 19
Elongation ( % ) 64
Hardness F73(Rockwell)
 
Mechanical Properties – Temper = H/2
Tensile Strength (psi x 10³) 68
Yield Strength (psi x 10³) 55
Elongation ( % ) 28
Hardness B78(Rockwell)
 
Mechanical Properties – Temper = H
Tensile Strength (psi x 10³) 81
Yield Strength (psi x 10³) 75
Elongation ( % ) 10
Hardness B87(Rockwell)