The excellent steel plate of cold-workability during shaping and its manufacture method

The excellent steel plate of cold-workability and its manufacture method when the present invention provides shaping.The steel plate of the present invention is characterised by that it is into being grouped into：In terms of quality %, contain C：0.10~0.40%, Si：0.01~0.30%, Mn：0.30~1.00%, P：0.0001~0.020%, S：0.0001~0.010%, Al：0.001~0.10%, surplus is made up of Fe and inevitable impurity, wherein, (a) ratio of the number of the number of the carbide of the ferrite grain boundaries carbide transgranular relative to ferrite is more than 1, (b) ferrite particle diameter is more than 5 μm and less than 50 μm, (c) intra-face anisotropy of r values | Δ r | it is less than 0.2, (d) Vickers hardness is more than 100HV and below 150HV, { 311 } of the 1/2 thickness of slab part of (e) steel plate The random intensity ratio in orientation is less than 3.0.