... #,16Mn, ASTM A106 Gr.B, ASTM A53 Gr.B, St 37, St 42, St 52, Q 235, Q 195, Q345, 27SiMn Square steel ... (mm)Thickness(mm) 20×401.3--3.025×251.3--1.730×301.2--3.030×501.3--2.530×601 ... Gr.AASTM A53 Gr.AASTM A179-CASTM A214-CASTM A192 St 37-2St 35.8St 35.420#ASTM A106 Gr.BASTM ... A53 Gr.BASTM A315 Gr.BASTM A210-A-1 St 42St 4516MnASTM A210-CSt 52.4St 52.3St 52 45 ...