Sn Content in Sn63 Pre-Tin

Hello All,

I recently had a case of excessive tin coming from a solder pot sample. The solder is SN63 but the results of testing had a 64.97% for Sn. The J-STD-001 spec is 61.5% to 64.5%. The pot is used to pre-tin wires which will then be soldered onto assemblies using Sn63.

Question, what would be the potential risk with solder joint with the sample being slightly over the max limit and knowing that additional solder will be used to solder the wires.

Appreciate your comments.

Thanks, Reggie

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