... SS400,A36,S235JR SS400/SS540 hot rolled mild steel JIS standard U Channels Mild steel U channel, U steel, ... : SS400, ST37-2, A36, S235JR, Q235, Q345 etc. Standard: GB/JIS/EN/ASTM/DIN and others.Packing: In Bundle ... 5mm -320*88*8mm Japanese standard size: 50*25*3mm-150*75*6.5mm American standard size:102*40*3.2- ... , Channel for shipment3.Loading pic4.Contact person GB standard U shape channel steel Q235B