carbon steel blocks 1)UT TEST C/C 2)forging,T100~ ... 3)black or machined surface 4)annealing S45C/S50C/C45 CARBON STEEL BLOCKS Forged steel Grade: C45 Similar grade: S45C, CK45 ... negotiation. (By bulk shippment or By Container) Other Steel Grade: Carbon Steel: C45, CK45, C60, CK15; Alloy Steel: ST52-3, ASTM ... .2714; Manufacturer: Dongguan Yagang Metal Materials Co.,Ltd C45/S50C carbon steel blocks