SS316L SS317L Seamless Stainless Tube Steel Square Tubing 18mm BS

316 Polished Stainless Steel Square Pipe Aisi Seamless Food Grade

Stainless Steels

In a technical sense, the term alloy steel is reserved for those steels that contain a modest amount of alloying elements (about 1-4 percent) and generally depend on thermal treatments to develop specific mechanical properties. Alloy steels are always killed, but special deoxidation or melting practices, including vacuum, may be specified for special critical applications. Alloy steels generally require additional care throughout their manufacture because they are more sensitive to thermal and mechanical operations.

Stainless steels are high-alloy steels and have superior corrosion resistance to the carbon and conventional low-alloy steels because they contain relatively large amounts of chromium. Although other elements may also increase corrosion resistance, their usefulness in this respect is limited.

Stainless steels generally contain at least 10 percent chromium, with or without other elements. It has been customary in the United States, however, to include in the stainless steel classification those steels that contain as little as 4 percent chromium. Together, these steels form a family known as the stainless and heat-resisting steels, some of which possess very high strength and oxidation resistance. Few, however, contain more than 30 percent chromium or less than 50 percent iron.

Stainless Steel Square Pipe Specification