ASTM A36 square steel : Available Standard: GB Standard/ASTM Standard/DIN Standard Material: SS400,ASTM A36, ASTM A572,ST37-2, ASTM A36 square steel1.square steel available Standard: GB Standard/ASTM Standard/DIN Standard2.square steel material: SS400,ASTM A36, ASTM A572,ST37-2, S45C,Q235B,16Mn,Q345B 3.square steel size: 5.5x5.5 to 200x200mm4.square steel length: 5.8 to 12 m (we can supply any ...