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来源：原创 | 发布时间：09-06-15 | 点击次数： |
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下表是美联邦制定之焊锡标准，给广大客户作参考用：
| 美国标准 FEDERAL SPECIFICATIONS AND STANDARDS（M.I.L） |
| QQ－S－571ESOLDER－ALLOY COMPOSITIONS |
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Compo
sition |
Tin |
Lead |
Anti-
mony |
Bis-
muth,
max |
Sllyer |
Copper,
max |
Iron
max |
Zinc
max |
Alumi-
num,
max |
Arse-
nic,
max |
Cad-
nlum
nax |
Total
of alt
ofhors
max |
| Sn 63 |
62.5
to
63.5 |
Remalnder |
0.20
to
0.50 |
0.25 |
--- |
0.08 |
0.02 |
0.005 |
0.005 |
0.03 |
--- |
0.08 |
| Sn 60 |
59.5
to
61.5 |
Remalnder |
0.20
to
0.50 |
0.25 |
--- |
0.08 |
0.02 |
0.005 |
0.005 |
0.03 |
--- |
0.08 |
| Sn 50 |
49.5
to
51.5 |
Remalnder |
0.20
to
0.50 |
0.25 |
--- |
0.08 |
0.02 |
0.005 |
0.005 |
0.03 |
--- |
0.08 |
| Sn 40 |
39.5
to
41.5 |
Remalnder |
0.20
to
0.50 |
0.25 |
--- |
0.08 |
0.02 |
0.005 |
0.005 |
0.02 |
--- |
0.08 |
| Sn 30 |
29.5
to
31.5 |
Remalnder |
1.4
to
1.8 |
0.25 |
--- |
0.08 |
0.02 |
0.005 |
0.005 |
0.02 |
--- |
0.08 |
| Sn 20 |
19.5
to
21.5 |
Remalnder |
0.8
to
1.2 |
0.25 |
--- |
0.08 |
0.02 |
0.005 |
0.005 |
0.02 |
--- |
0.08 |
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