bedra93900

High Leaded Tin Bronze

Characteristics：
bedra93900 is a high lead tin bronze alloy. The addition of lead improves the alloy's wear resistance and machinability. It possesses lubricating properties, wear resistance, and corrosion resistance, making it suitable for use in bearing applications.

Typical applications:

It is widely used for general-service bearings under moderate pressure, wear-resistant components such as rod bushings, wedges, and pump impellers. It is also employed in steel-backed automotive and aero-engine bushings that may experience poor lubrication.

Standardization and composition

UNS	C93900
GB	ZQPb15-5-1
Cu	balance
Pb	14-17%
Sn	4.0-6.0%
Zn	≤ 0.5%
P	≤ 1.5%
Ni	1.0-2.0%
Fe	≤ 0.3%
Si	≤ 0.1%
Al	≤ 0.1%

Physical properties①

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

Density (g/cm³)	9.25
Metling temperature (℃)	943
Electrical conductivity (%IACS)	11
Thermal conductivity (W / m x K)	52.3
Coefficient of thermal expansion② (10-6/K)	18.5
Modulus of elasticity (GPa)	75.8

Fabrication Properties

Note③：C36000 = 100%

Capacity for being cold worked	Good
Capacity for being hot formed	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.)	Hardness(HBW min)
M07	15 ≤ Ф 100	180	100	6	60

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