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I have components that need to be tin/lead plated to MIL-F-14072 F.

What type of solder is used for this class, M230? 63/37 sn/pb? The drawing does not specify.

Rick Flores

2006

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2006

I'm not sure of the question. MIL-F-14072D (latest revision per ASSIST) finish M230 is defined in Table III (on page 34): A base plating of 0.0025" copper per MIL-C-14550, Class 4, plus 0.0076" electroplated lead-tin (50-70% tin) per MIL-P-81728. Footnote 1 of Table III requires reflow of the electroplated lead-tin.

Finish M258 (page 31) is 0.0076" hot-dipped lead-tin solder (40-60%) per QQ-S-571. Solders and impurity limits are given for Class 1 & Class 2 applications, as well as information on fluxes.

Ken Vlach [deceased]
- Goleta, California
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