Cold rolling: Using hot-rolled steel coil sc1 as raw material, after pickling to remove oxide scale, cold rolling is carried out, and the finished product is rolled hard coil. The steel coil sc1 work hardening caused by continuous cold deformation increases the strength, hardness and toughness of rolled hard coil.

Grade	aYieldStrength	TensileStrength	bLo=80mm, b=20mm	BendingTest@180° (b≥ 20mm)
St37-2G	≥ 215MPA	360-510MPA	≥ 20%	0.5a
St44-3G	≥ 245MPA	430-580MPA	≥ 18%	1a
St52-3G	≥ 325MPA	510-680MPA	≥ 16%	1a
Taking RP0.2 in case of indistinct yield, otherwise ReL.