High-quality carbon structural steel cold-rolled sheet and strip GB/T13237--1991
High Quality Carbon Structural Steel Cold Rolled Steel Sheet and Steel Strip GB/T13237 -- 1991
High quality carbon structural steel cold rolled steel sheet and steel strip referred to in this standard are commonly named as 08F, 10F, 15F, 20F, 25F, 30F, 35F, 40F, 45F and 50F steel.
08F, 10F, 15F,......