... .Size: 10-63mm 3.Length:6-12m Steel I-beam 1.Grade:Q235B,Q345,SS400,A36,etc. 2.Size: 10-63mm 3.Length ... :6-12mMild Steel I-beam 1.Grade:Q235B,Q345,SS400,A36,etc2.We can supply the specification as bellows ... ,Standard AISI,ASTM,GB,etcGrade201, 304, 316, 321, 316LDescriptionStianless steel I-beam, I-stee ...