bedra93700

High Leaded Tin Bronze

Characteristics:

It is a continuous cast high-leaded tin bronze alloy with excellent free-machining properties. It offers excellent lubricity due to its lead content. The alloy possesses moderate strength and good corrosion resistance to mild acids typical of mine water. It is ideal for bearing applications where lubrication is inadequate and minor misalignment may occur.

Typical Applications:

It is widely used as a general-purpose bearing material for high-speed applications under moderate to heavy loads and vibration. It is also employed in crankshafts, bearing plates, machine parts, bushings, and applications requiring acid resistance, such as exposure to sulphite fluids. Additionally, it serves as steel-backed bushes for automotive and aero engine applications subject to poor lubrication.

Standardization and composition

UNS	C93700
EN	CuSn10Pb10 (CB495K)
GB	ZCuPb10Sn10
Cu	78-82%
Pb	8.0-10%
Sn	9.0-11%
Zn	≤ 0.8%
P	≤ 0.1%
Ni	≤ 0.5%
Fe	≤ 0.7%

Physical properties①

Note①：The testing temperature is 20℃. Note②：The testing temperature range is 20℃ to 300℃.

Density (g/cm³)	8.86
Metling temperature (℃)	929
Electrical conductivity (%IACS)	10
Thermal conductivity (W / m x K)	46.9
Coefficient of thermal expansion② (10-6/K)	17.8
Modulus of elasticity (GPa)	75.8

Fabrication Properties

Note③：C36000 = 100%

Cold workability	Good
Hot workability	Poor
Brazing	Good
Resistance welding	Not recommended
Machinability rating③	80%

Mechanical Properties

Temper	Diameter (mm)	Tensile Strength (MPa min.)	Yield Strength (MPa min.)	Elongation (% min.)
M07	15 ≤ Ф ≤ 100	220	140	5

Dimension Tolerance and Delivery Form

Note④：The tolerances listed in the table are specified as all plus or all minus. When tolerances are specified as plus and minus (±), half the values given.

			Straight bar
Diameter (mm)	Tolerance④ (mm)	Ovality (mm)	Length (mm. max.)	Straightness (mm/m max.)
15 ≤ Φ 30	0.1	0.05	4000	0.5
30 ≤ Φ 60	0.2	0.10	4000	0.5
60 ≤ Φ 80	1.0	0.50	4000	1.0
80 ≤ Φ ≤ 100	1.6	0.80	3000	1.0