B921

B921 (Standard Specification for Non-hexavalent Chromium Conversion Coatings on Aluminum and Aluminum Alloys)· ASTM (Соединенные Штаты) · 4 материалов

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