Depth of superficial defects


There are INTERNATIONAL STANDARDS governing the acceptance limits of superficial defects.

AUSA is covered by STANDARDS such as EN 10277-1 Class 1, EN 10277-1 Class 2 and EN 10277-1 Class 3 for cold drawn steels.

Standard EN 10277-1 Class 1

Dimensional range, mm. Maximum depth Standard Class
 t ≤ 15 0,3 mm. EN 10277-1 1
15 < t ≤ 100 0,02 x t mm. EN 10277-1 1

Standard EN 10277-1 Class 2

Dimensional range, mm. Maximum depth Standard Class
 l ≤ 15 0,3 mm. EN 10277-1 2
15 < l ≤ 75 0,02 x d mm. EN 10277-1 2
l > 75 1,5 mm. EN 10277-1 2

Standard EN 10277-1 Class 3

Dimensional range, mm. Maximum depth Standard Class
 d ≤ 20 0,2 mm. EN 10277-1 3
20 < d ≤ 75 0,01 x d mm. EN 10277-1 3
d > 75 0,75 mm. EN 10277-1 3