... %, smooth surface, less scale, easy to be pickled.4,Automatic bundling with 4 lines by Machine in tidy and good looks5,Big ... main grades are 45~80,SWRH42A~82A and SWRH42B~82B. With higher comprehensive mechanical performance after quality control process for this ... could be used to make steel nails and mechanical components. With higher strength, hardness and wearability, the high carbon steel coil ...