Material
Bronze ( DIN-CuSn7Zn4Pb7 )
Introduction
Casting bronze bearings(CuSn7Zn4Pb7), made of tin bronze CuSn7Zn4Pb7 as base material, are produced by the process of precision machining. They are widely used in the applications of mold, metallurgy and engineering machinery due to the advantages of low friction coefficient, high working temperature and long life.
Chemical Composition%
|
Material
|
Cu
|
Ni
|
P
|
Pb
|
Sn
|
Zn
|
Al
|
Fe
|
S
|
Sb
|
Si
|
|
CuSn7Zn4Pb7
|
81-85
|
≤2
|
≤0.1
|
5-8
|
6-8
|
2-8
|
≤0.01
|
≤0.2
|
≤0.1
|
≤0.3
|
≤0.01
|
Physical and Mechanical Properties
|
max. operating temperature Tmax
|
+300 ℃
|
|
min. operating temperature Tmin
|
-40 ℃
|
|
max. load p max
|
40 N/mm2
|
|
tensile strength
|
230 N/mm2
|
|
elongation
|
12-15 %
|
|
hardness
|
60-70 HB
|
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