3-6、Guidance for the selection of solder wires
3-6-1 Sn-Cu Alloys
| Series |
Composition |
Melting Point/Solidus |
With Flux core |
No Flux core |
Recommendation |
| WH-10 |
S-Sn99.90 |
232 232 |
● |
● |
|
| WH-22 |
S-Sn99.7Cu0.3 |
227 227 |
● |
● |
|
| WH-23 |
S-Sn99.3Cu0.7 |
227 227 |
● |
● |
Used widly |
| WH-24 |
S-Sn99Cu1 |
227 240 |
● |
● |
|
| WH-25 |
S-Sn97Cu3 |
227 275 |
● |
● |
|
| WH-323 |
S-Sn99Cu0.6Ni0.4 |
226 226 |
— |
● |
|
| WH-335 |
S-Sn96.75Cu3Ni0.25 |
— |
● |
● |
|
3-6-2 Sn-Ag Alloys
| Series |
Composition |
Melting point/Solidus |
With flux core |
No flux core |
Recommendation |
| WH-26 |
S-Sn97Ag3 |
221 200 |
● |
● |
|
| WH-27 |
S-Sn96.5Ag3.5 |
221 221 |
● |
● |
|
3-6-3 Sn-Ag-Cu Alloys
| Series |
Composition |
Melting point/Solidus |
with flux core |
No flux core |
Recommendation |
| WH-316 |
S-Sn97Ag1Cu2 |
— |
● |
● |
|
| WH-326 |
S-Sn96.5Ag3Cu0.5Ce |
217 219 |
● |
● |
For the slap-up products |
| WH-327 |
S-Sn95.5Ag3.5Cu1 |
218 218 |
● |
● |
|
| WH-373 |
S-Sn99Cu0.7Ag0.3 |
218 218 |
● |
● |
For general products |
| WH-402 |
S-Sn96.5Ag2Cu1Sb0.5 |
216 222 |
|
● |
|
3-6-4 Sn-Bi-X Alloys
| Series |
Composition |
Melting point/Solidus |
with flux core |
No flux core |
Recommendation |
| WH-330 |
S-Sn93Ag4Bi3 |
219 221 |
● |
● |
|
| WH-138 |
S- Bi58Sn42 |
138 138 |
— |
● |
|
3-6-5 Sn-Sb Alloys（Eutectic）
| Series |
Composition |
MeltingPoint(℃) |
With flux cor |
No flux core |
Bar |
Recommendation |
| WH-210 |
S-Sn95Sb5 |
234-240 |
— |
● |
● |
|
Notice：“●” in the table represents this kind of product is supplied，“－” represents no products
