Carbon steel forged flanges mean the forging flange material is carbon steel.Carbon steel forged flanges have different hardness and strength during the use and production,which can play a different role and show different characteristics.Flange connection may need to bear very high tensile,compression,torsion,shear strength,carbon steel forged flange is the better choice.The carbon steel forged flanges materials contain ASTM A105,A350 LF2,SS400,P235GH,P250GH,C22.8,Q235,20#,16Mn,etc.