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Chemical Composition & Physical Properties
|
Grade
|
Chemical Composition (mass fraction) %
|
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|
Sn
|
AI |
Zn
|
Ni
|
Fe
|
Pb
|
P |
Cu
|
Total impurity content
|
|
|
QSn4-3
|
3.5~4.5
|
0.002
|
2.7~3.3
|
0.2
|
0.05
|
0.02
|
0.03
|
remain
|
0.2
|
|
Grade
|
Condition
|
Tensile Test
|
Hardness Test
|
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|
Thickness/mm
|
Tensile Rm/
(N/mm2) |
Elongation after fracture %
|
HV
|
HRB
|
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|
QSn4-3
|
M
|
≥ 0.15
|
≥290
|
≥40
|
-
|
- |
|
Y
|
540~690
|
≥3
|
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| T | ≥635 | ≥25 | ||||