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Type 304, 316, 303 & 17-4 Stainless Steel Alloys

Known for its' corrosion resistance characteristics, the different grades and finishes of stainless steel make the composition suitable for a wide variety of environments. Stainless Steel is used in many applications and each grade of SS can be used in a broad range of functions. For example, type 316 is used heavily in jewelry and watch industry as well as the construction industry. Stainless Steel 304, on the other hand, is utilized in the brewing and food processing industry as well as the being used for heat exchangers, chemical containers and more. Regardless of the application, there is a grade of stainless steel that will meet your needs. The San Antonio branch of Farmer's Copper maintains a large inventory of various grades of stainless steel. If a particular size, grade or shape is not listed, do not hesitate to call Farmer's Copper today.

303 stainless steel (UNS S30300) is the free-machining grade of 304 with specific limits of sulfur added to produce free-machining characteristics for use in automatic machining operations. Type 303 is a non-magnetic austenitic stainless steel, which is non-hardenable by heat treatment. 303 SS is available in round, square, hex and flat bar shapes.

304/304L stainless (UNS S30400) is the most common and widely used stainless steel. It is an austenitic stainless steel with non-magnetic properties in the annealed condition that offer good corrosion resistance to both chemical and atmospheric exposures, with a high resistance to oxidation. Type 304/304L has good forming and excellent welding characteristics. It is non-hardenable by heat treatment. SS type 304 is available in round, square, hex, and flat bar variety in addition to the sheet, plate, tube, pipe, and angle shapes.

316/316L stainless (UNS S31600) is a chromium-nickel austenitic stainless steel with added molybdenum, which provides greater resistance to corrosion and pitting. It is non- magnetic and offers higher strength at elevated temperatures. It is non-hardenable by heat treatment. Similar to 304, SS 316 is available in the round, square, hex or flat bar and sheet, plate and angle shapes.

17-4 PH stainless steel (UNS S17400) is a precipitation hardenable, martensitic stainless steel that delivers an excellent combination of oxidation and corrosion resistance, and is comparable to 304 in most conditions or environments. Mechanical properties, such as strength and ductility, can be optimized with heat treatment. SS type 17-4 is available as a round bar.

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