
plating, anodizing, & finishing Q&As since 1989
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ASTM A764 Coating Weight Measurement
2003
We currently specified to a spring manufacturer a wire size as follows:
Hard Drawn Steel Wire, ASTM A764
[affil. link]
Class 1, Type B, Finish 1, Tensile Class 1, coating applied by Electrolytic Process.
The minimum coating for .072 dia. wire is 46gm/m2
The mill certification states that it meets the minimum but when tested it fails and is tested at 28.99gm/m2.
The mill representative states this is tested prior to draw which will cause the coating weight to change. How should this be tested? Is ASTM A764
[affil. link]
specific as to how and when?
Help!
- Rochester, New York
