... 1,Grade: 20# ,45# , 20Cr ,40Cr, 2, SIZE: by the drawing 3, flat bar ,round bar, hexagonal bar. Cold drawing steel profile ... 1,Grade: 20# ,45# , 20Cr ,40Cr2, SIZE: by the drawing3 ... , prducts: flat bar ,round bar, hexagonal bar , square bar ,and so ...