MIL-G-45204C
AMS-2422 & 2425
ASTM-B-488
If the hardness grade for the gold coating is not specified, type I shall be furnished at hardness Grade A, and type II shall be furnished at hardness Grade C. For soldering, a thin high purity soft gold coating is preferred. A minimum thickness of 0.000050 inch and a maximum thickness of 0.00010 inch shall be plated (Hopwood Globe).
