First, the general board, A3 sheet: Q235A, Q235B, Q235C, Q235D, Q235E two, high-strength low-alloy steel plate, low alloy structural steel: 16Mn, 16mn, 16 manganese, Q345A, Q345B, Q345C, Q345D, Q345E, Q460B, Q460C , Q460D, Q460E, 20cr, 40cr, 15crmo three, carbon structural steel: S45C, S50C, S35C, 10 #, 20 #, 35 #, 45 #, 50 #, 20mn, 25mn, 30mn, 35mn, 40mn, 45mn, 50mn , on the 10th, the 15th, the 20th, the 25th, the 30th, No. 35, No. 40, No. 45, No. 50, No. 55, No. 60, No. 65, No. 70, No. 75, No. 80