... blocks Size:150mmx150mm to 550mmx550mm Length:3m and up or the fix length according the customer. Forged BlocksSteel grade:Carbon steel:Chinese ... :CK15,C.22,C45,CK45,C60,CK60;C45E;Alloy Steel:Chinese Standad:16Mn,20Mn,30Mn2,30Mn5,40Cr,Q345D,Q345E,Q390;42CrMo ... /3.1.B;Manufacturer:Jiangsu Zhuhong Forging Co.,Ltd Forged Blocks 16MnCr5/S355J2G3/AISI4140