Grade: ASTM A36 , Gr50,Gr60 , BSEN S275JR/JO & S355 JR/JO , JIS SS400 & SS540 Length : 6 Meter to 12 Meter Thickness , t(mm) â?? 4 5 6 7 8 9 10 11 12 Section (a X a ) (mm) â?? Mass (kg/m) 40X40 2.42 2.97 3.52 --- --- --- --- --- --- 45X45 2.74 3.38 4.00 --- --- --- --- --- --- 50X50 3.06 3.77 4.47 --- --- --- --- --- --- 55X55 3.32 4.16 5.00 --- --- --- --- --- --- 60X60 3.70 4.57 5.42 6.28 7.09 --- --- --- --- 65X65 --- 4.96 5.89 6.83 7.73 8.69 9.76 --- --- 70X70 --- 5.37 6.38 7.38 8.36 9.40 10.30 --- --- 75X75 --- 5.76 6.85 7.93 8.99 10.03 11.24 --- --- 80X80 --- 6.12 7.34 8.49 9.63 10.8 11.9 --- --- 90X90 --- --- 8.3 9.61 10.9 12.2 13.4 14.74 15.9 100X100 --- --- 9.26 10.7 12.2 13.6 15 16.4 17.8 110X110 --- --- --- 11.72 13.4 15 16.6 18.26 --- 120X120 --- --- --- --- 14.7 16.5 18.2 19.9 ---