This is Hot Rolled Steel in H or I shaped. These are also known as I beam or Universal Beam and H Beam or Universal Column. These are basically used as support members in fabrication and erection of steel structures. They are weldable and have good mechanical properties for the intended use.

Size
100 X 50 MM, 125 X 65 MM, 150 X 75 MM, 175 X 85 MM, 200 X 100 MM, 250 X 125 MM, 300 X 140 MM, 350 X 140 MM, 400 X 140 MM, 450 X 150 MM, 500 X 180 MM, 600 X 210 MM
Grade
MS, IS:2062

I - BEAM : It is represented by dimensions of Web & Flange. For e.g. 150x75 beam means,Width of Web = 150mm, Width of Flange = 75mm

H - BEAM : In H-Beam generally the sizes of the Web & Flange are almost equal. When we say, 254 x 254 beam means Web = 254mm & Flange = 254mm.