Mild steel I Beam Grade:Q235B,Q345,SS400,A36,etc. Size: 100 ... -12m Best quality,best price We are a biggest Structural steel supplier inTangshan,China,mainly focur on : 1) H beams ... ,we are a first agent of Jinxi Steel Group,Laiwu Steel goup and Changzhi Steel group,which are three of the biggest ... certificates and so on. And we can supply Boron added mild steel i beam also at very good price. If you are ...