U Channel Steel 1.Standard: GB, JIS, ASTM 2.Size: 63*40- ... as required 3.Material: Q235, Q345, SS400, Detailed Product DescriptionU Channel Steel 1.Standard: GB, JIS, ASTM 2.Size: 63*40 ... *77mm or as required 3.Material: Q235, Q345, SS400, u channel steelChinese Standard ChannelsHot Rolled Normal Channels Model , Size and Weight ...