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steel 4" x 6" separate test panel for chemical conversion coating quality control by TT-C-490

TT-C-490 Test Specimens & Coupons

Separate test specimens and coupons (also called test panels) used in quality and conformance testing by Federal Specification TT-C-490. These test panels are 4" x 6" x 0.032". They can be made from 2024-T3 aluminum or SAE 1010 (ASTM A109 or ASTM A1008) cold rolled steel. Each panel is cut to size, deburred, and cleaned. Metaspec provides these panels with an as-rolled surface finish (unpainted and uncoated). 

  • Regular test panels are PVC-coated on both sides, cut to size, deburred, and packed in bundles. These panels may have some minor surface defects and will have mill oil on the surface, as these are the sheets in “as-received” condition from the aluminum mill.

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