Home Our Services About MRT Design Advice The Choice of Process The Choice of Alloy Which Material? Aluminium Alloys Zinc Alloys Copper Alloys Overview LG2 PB2 Machining Considerations The Choice of Finish Video Contact Us

Copper Alloy PB2 (PHOSPHOR BRONZE)

Mechanical Properties

Strength at elevated temperatures
Service at elevated temperatures is limited by resistance to gradual deformation over prolonged periods of time and to oxidation.  It is not suitable for sustaining loads at temperatures exceeding 300°C.  The mechanical properties shown above cannot be used as an indication of performance at elevated temperatures.

Physical Properties

Coefficient of Thermal Expansion (per °C @ 0-250°C)	0.000018.3
Thermal conductivity (W/M°C)	45
Electrical conductivity (% copper standard @ 20°C)	9
Density (g/cm3)	8.8
Freezing range (°C) approx.	1000-831

Machinability
Machinability is good, being a medium hardness alloy.  This material gives short turnings.

Corrosion Resistance
This alloy finds wide application where good corrosion resistance is required.

Application and General notes
General uses include unlined bearings for heavy compressive loads and shock, piston rings, axle boxes, gear wheels, centrifugal castings, and castings which require good wear resistance.