U channel material:Q235,SS400,S235JR,ST37-2 size:50*37*4. ... ,Q195,Q345,SS400,ASTMA362.Standard:GB,ASTM,DIN,JIS,BS 3.Thickness:4.5-14.5mm 4.Size:50mm*37mm~400mm ... (mm)thickness(mm)W (kg/m)5#50374.55.4386.3#63404.86.6348#804358.04510#100485.310.00712#120535.512 ...