A36 Steel Square Bar is a hot rolled, mild steel solid steel bar with radius corners that is ideal for all structural applications, general fabrication, manufacturing and repairs. Steel Squares are widely used in industrial maintenance, agricultural implements, transportation equipment, ornamental iron work, fencing, artwork, etc. This steel shape is easy to weld, cut, form and machine with the proper equipment and knowledge. Metals Depot stocks many sizes of steel square at wholesale prices in ready to ship precut and mill lengths or you can order online just what you need custom Cut to Size in small or large quantity.