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      Lead-free solder bars

      Composition Selection Of Solder Alloys

      4-6 Lead-free Solder Bar Alloy Composition Selection Guide

      4-6-1 Sn-Cu Alloys

      Series

      WH-10

      Alloy Composition

      S-Sn99.90

      Melting Point(℃)

      232

      Proposed Temperature

      240-260

      Recommendation

       

      WH-11 S-Sn98Cu2 -- --  
      WH-22 S-Sn99.7Cu0.3 227 240-260  
      WH-23 S-Sn99.3Cu0.7 227 240-260 Widely Used,Economical
      WH-24 S-Sn99Cu1 227-240 240-260  
      WH-25 S-Sn97Cu3 227-275 240-260  
      WH-323 S-Sn99Cu0.6Ni0.4 226 240-260  

      4-6-2 Sn-Ag Alloys

      Series

      WH-10

      Alloy Composition

      S-Sn99.90

      Melting Point(℃)

      232

      Proposed Temperature

      240-260

      Recommendation

       

      WH-26 S-Sn97Ag3 221-230 240-260  
      WH-27 S-Sn96.5Ag3.5 221 240-260  
      WH-28 S-Sn96Ag4 221-225 240-260  
      WH-331 S-Sn77In20Ag3 178-189 240-260  
      WH-372 S-Sn99Ag1  

      4-6-3 Sn-Ag-Cu Alloys

      Series

      WH-10

      Alloy Compostion

      S-Sn99.90

      Melting Point(℃)

      232

      Proposed Temperature

      240-260

      Recommendation

       

      WH-316 S-Sn97Ag1Cu2  
      WH-326 S-Sn96.5Ag3Cu0.5Ce 217-219 240-260 Widely use for high-end electronic products
      WH-327 S-Sn95.5Ag3.5Cu1 218 240-260  
      WH-328 S-Sn93Ag5Cu2 217 240-260  
      WH-329 S-Sn95Ag4Cu1 206-219 240-260  
      WH-373 S-Sn99Ag0.3Cu0.7 For general electronic products
      WH-404 S-Sn92Ag5Cu2Sb1 Military used
      WH-402 S-Sn96.5Ag2Cu1Sb0.5 216-222 240-260  

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