Raw Material Cold Rolled Steel Coil

The surface of the raw material cold rolled steel coil is a small piece of overlapping thin layer that is not exfoliated and presents a mountain-like or line-like shape.

The material has holes.

The material contains non-metallic inclusions. When cold rolling, the local tensile strength exceeds the limit, so that the material is partially broken to form holes;

Hot-rolled raw materials are produced with severe scratches, chisel marks and other defects, which are torn after cold rolling.

Common Grades	C	Mn	P	S	Cu	Ni	Cr	Mo	V	Cb	Ti
CSA	0.1	0.6	0.03	0.035	0.2	0.2	0.15	0.06	0.008	0.008	0.025
CSB	0.02-.15	0.6	0.03	0.035	0.2	0.2	0.15	0.06	0.008	0.008	0.025

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