B921

B921 (Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys)· ASTM (United States) · 4 materials

Designation
B921 Cr Class 1 chevron_right
B921 Cr Class 2 chevron_right
B921 Cr Class 3 chevron_right
B921 Cr Class 4 chevron_right