A500 Gr-B

Standard specification published by the   ASTM for cold-formed welded and seamless carbon steel structural tubing in   round, square, and rectangular shapes.

A513

Offers high weldability and is used   frequently in structural applications in bridges and buildings as well as in   both the automotive and appliance industry.

6061, 6063

Heat treatable, structural alloy with   medium strength and good weldability, formability, machinability, and   relatively good corrosion resistance.

304

Offers resistance to corrosion, has good   formability and can be readily welded by all methods. One of the most   commonly used grades across the industry.

304L

Extra low carbon avoids harmful carbide   precipitation due to welding. Same corrosion resistance as 304 with lower   mechanical properties.

316

Better pitting and corrosion resistance   than 304, as well as higher strength at elevated temperatures. 316 can be   used for valves, marine equipment, pumps, and chemical equipment.

316L

Extra low carbon avoids harmful carbide   precipitation due to welding. Same excellent corrosion resistance as 316. It   exhibits the same high strength, toughness and workability as 304 alloys.

409

Lowest cost in terms of stainless. Used in   automotive exhaust systems. Its resistance to oxidation and corrosion is   good, the finish or look does not matter.