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

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

Finishing.com honored Ken for his countless carefully researched responses. He passed away May 14, 2015.
Rest in peace, Ken. Thank you for your hard work which the finishing world, and we at finishing.com, continue to benefit from.

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