Cold Annealed Steel Coil

Stretching descaler has insufficient stretching coefficient, so that the iron sheet is not fully broken and peeled, which affects the pickling effect;

Strip steel shape is poor, such as sickle bend, wave shape, etc., so that the mechanical descaling effect is poor, easy to cause partial under-washing.

The surface has a large area of point defects, generally appearing on one side, comprehensive, white after annealing, and black spots after leveling.

The annealed steel coils are bonded together to each other, which is called bonding. After the flattening, the point-like circular arc creases are point-stick; the arc-shaped creases appearing in the rolling direction are strip-shaped bonds; serious surface bonding, The flat unwinding is torn or voids become a waste roll.

HSLA Grades	C	Mn	P	S	Cu	Mo	V	Cb	Ti
45C1	0.22	1.35	0.04	0.04	0.2	0.06	0.005	0.005	0.005
45C2	0.15	1.35	0.04	0.04	0.2	0.06	0.005	0.005	0.005
50C1	0.23	1.35	0.04	0.04	0.2	0.06	0.005	0.005	0.005

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