Mild steel checkered plate carbon steel manufacturer in China 1.Grade:Q235B,Q345B,SS400,S235JR,ASTM A36,S355JR 2. ... Factory pric Mild steel checkered plate carbon steel manufacturer in China Quick details: Standard: AISI,ASTM,BS,JB,JIS Brand name ... ,St37-2,St52,ASTM A36 Length: 6 meter or cut the length as your requirements