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3-6 Specifications and Selection Guide for Lead-free Solder Wire
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
