DC01 cold rolling hard coil is made of hot rolled plate at room temperature, although the steel plate will be heated by rolling during the process, but DC01 cold rolling hard coil is still called cold rolling. Due to the cold rolling after continuous cold rolling, the mechanical properties are poor and the hardness is too high. Must undergo annealing to restore its mechanical properties, no annealing is called DC01 cold rolling hard coil. Hard roll is generally used to make products without bending or stretching.

Quality	Testing Direction	Material-No.	Yield Point Rp0,2 (MPa)	Tensile Strength Rm (MPA)	Elongation A80 (In %) Min.	R-Value 90° Min.	N-Value 90° Min.	Old Description
DC01	Q	1.0330	≤280	270 - 410	28			St 12-03
DC03	Q	1.0347	≤240	270 - 370	34	1,30		St 13-03
DC04	Q	1.0338	≤210	270 - 350	38	1,60	0,18	St 14-03
DC05	Q	1.0312	≤180	270 - 330	40	1,90	0,20	St 15-03
DC06	Q	1.0873	≤170	270 - 330	41	2,10	0,22
DC07	Q	1.0898	≤150	250 - 310	44	2,50	0,23