Types 304 and 304L Sheets, Plates, Bars, Angles & Tubes
UNS S30400, 30403
Type 304 is the basic “18 — 8” chromium-nickel stainless steel. It combines excellent mechanical properties with remarkable resistance to many corrosive agents its high resistance to rust, and high fabrication abilitys in a wide range of industties.
SPECIFICATIONS The following specifications are generally applicable: Sheets & Plates: AMS 5513, ASTM A 167, ASTM A 240 Bars: AMS 5639, ASTM A 276, ASTM A 479
APPLICATIONS Used where corrosion resistance and good mechanical properties are primary requirements. These grades are widely accepted in such industries as dairy, beverage, and other food products where the highest degree of sanitation and cleanliness is of prime importance. Pharmaceutical manufacturing, braces, tanks, frames to support equipment.
CORROSION RESISTANCE Types 304 and 304L show good resistance to corrosion. They are highly resistant to strong oxidizing acids, such as nitric acid, and resist attack by a wide variety of organic and inorganic chemicals. Maximum corrosion resistance is obtained in the annealed condition.
RESISTANCE TO SCALING Excellent scale resistance at temperatures up to 1600ºF in continuous service. Chromium-nickel grades have a high coefficient of expansion, which should be considered in designing.
WELDABILITY Easily welded by all the commercial processes except forging or hammer welding. The resulting weld had good toughness and ductility. Annealing is recommended after welding to maintain maximum corrosion resistance.
FORMING These grades have very good drawing and stamping properties.