1.Product name: U beam steel 2.Size:50-300mm 3.Standards: GB,JIS,EN,ASTM 4. ... channel,Steel U channel bar, channel steel bar ST37-2 Material: SS400, ST37-2, A36, S235JR, Q235, Q345 etc. Standard: GB/JIS/EN ... INTERNATIONAL TRADE CO.,LTDATTN:SELINACELL:86-15830565735SKYPE:hbxsd_selina UPN ST37-2 Hot rolled mild steel U Channel Steel Bar