... square steel pipe 1.Thickness:0.6 - 10 mm 2.Size:15*15-400*400mm 3.Grade:Q195,Q215,Q235, ... Q345 Square Steel PipeDimensions:15*15mm-400*400mm(1/2''*1/2''-16''*16'')Thickness:0.6-10mmLength:0.305-12m ... weldedSteel grade :Q195,Q215,Q235,Fe310,Fe360,St33,St330,St37-2,SS330,SS400,ASTM1010,ASTM1017,ASTM1020Manufactured to meet ISO9001,ASTM,DIN ... T.(mm)O.D.(mm)W.T.(mm)15*151.2-3.0120*1202.5-4.7520*201.3-3. ...