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 a premium as-rolled surface finish (unpainted and uncoated).