scope:

This specification covers electroueposited gold plating on metallic surfaces.

Gold plating shall be furnished in the following types and classes as specified (see 6.2).

Type I - 99.7 percent gold minimum

Type II - 99.0 percent gold minimum

Type III - 99.9 percent gold minimum

The following grades are assigned to the above types.

Grade A - Knoop hardness 90 max.

Grade B - Knoop hardness 91-129, incl.

Grade C - Knoop hardness 130-200, incl.

Grade D - Knoop hardness 201 and over.

If the hardness grade for the gold coating is not specified, Type I shall be furnished at hardness Grade A (90 Knoop, max) and Type II shall be furnished at hardness Grade C (130 to 200 Knoop).

The purity and hardness combinations shall be designated as follows:

Purity Hardness (grades) Type I A, B, or C Type II B, C, or D Type III A (only)

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, US Army Materials and Mechanics Research Center, ATTN: DRXMR-SMS, Watertown, MA 02172 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or letter.

NO DELIVERABLE DATA REQUIRED BY THIS DOCUMENT

Unless otherwise specified, the thickness shall conform to the class designation specified (see 6.2).

Class 00 - 0.00002 inch thick, minimum

Class 0 - 0.00003 inch thick, minimum

Class 1 - 0.00005 inch thick, minimum

Class 2 - 0.00010 inch thick, minimum

Class 3 - 0.00020 inch thick, minimum

Class 4 - 0.00030 inch thick, minimum

Class 5 - 0.00050 inch thick, minimum

Class 6 - 0.00150 inch thick, minimum

intended Use:

Gold plating is intended for electrical application, good corrosion resistance, good solderability, and other applications.