Alloys 304 / 304L

Alloys 304 / 304L

Product catalog summary
Technical Data Overview
Alloys 304 (S30400) and 304L (S30403) are variations of the 18% chromium – 8% nickel austenitic stainless steel, known for high strength, excellent corrosion resistance, and minimized carbon content. These properties make them ideal for applications requiring welding, such as architectural mouldings, chemical processing equipment, and more.

Industries and Applications
These alloys are predominantly used in the nuclear and power sectors, as well as general engineering. Typical applications include moisture separator reheaters, heat exchangers, feedwater tubes, and stator bars.

Mechanical Properties
  • 304: Tensile Strength (Rm) - 76 ksi (517 MPa) minimum; Yield Strength (R.p. 0.2%) - 31 ksi (207 MPa) minimum; Elongation - 40% minimum.
  • 304L: Tensile Strength (Rm) - 70 ksi (485 MPa) minimum; Yield Strength (R.p. 0.2%) - 25 ksi (170 MPa) minimum; Elongation - 40% minimum.

Physical Properties (Room Temperature)
  • Specific Heat: 500 J.kg-1.°K-1
  • Thermal Conductivity: 16.2 W.m-1.°K-1
  • Thermal Expansion: 17.2 mm/m/°C
  • Modulus of Elasticity: 19.3 GPa
  • Electrical Resistivity: 7.23 µohm/cm
  • Density: 8.00 g/cm3

Chemical Composition (% by weight)
  • 304 and 304L: Carbon (C) max 0.08, Manganese (Mn) max 2, Nickel (Ni) 8-10.50 (304) / 8-12.00 (304L), Chromium (Cr) 18-20, Sulfur (S) max 0.03, Nitrogen (N) max 0.1, Silicon (Si) max 0.75, Phosphorus (P) max 0.045.

Available Tube Product Forms
  • Straight
  • Coiled
  • Seamless
  • Seam welded and cold redrawn
  • Seam welded, cold redrawn, and annealed

Manufacturing Specifications
  • AMS 5566, ASTM A213, NFA 49-117
  • AMS 5569, ASTM A269, NFA 49-217
  • AMS 5647, ASTM A312, Mil-T 8504
  • AMS 6845, ASTM A632, Mil-T 8606
  • BS 10216 Pt 5, BS 3605 Pt 1
  • Also includes individual customer specifications.
See more

Catalog excerpts

Alloys 304 / 304L-1

STAINLESS STEEL ALLOYS 304 / 304L 9 finetubes www.finetubes.com Alloys 304 / 304L (UNS S30400 / S30403) AVAILABLE TUBE PRODUCT FORMS TUBING APPLICATIONS Alloys 304 (S30400) and 304L (S30403) stainless steels are variations of the 18 percent chromium - 8 percent nickel austenitic alloy, the most familiar and most frequently used alloy in the stainless steel family. High strength, excellent corrosion resistance and minimized carbon content make Alloy 304 and 304L Stainless Steels useful for applications where welding is required. Uses include architectural mouldings and trim, welded components of chemical, textile, paper, pharmaceutical and chemical industry processing equipment. Other advantages are its resistance to oxidation, excellent formability, ease of fabrication and cleaning, excellent strength to weight ratio and good toughness at cryogenic temperatures For severely corrosive environments, the lower content of Type 304L is preferred because of its greater immunity to intergranular corrosion. STRAIGHT COILED SEAMLESS SEAM WELDED AND COLD REDRAWN SEAM WELDED, COLD REDRAWN AND ANNEALED typical manufacturing specifications BS 10216 Pt 5 BS 3605 Pt 1 Also individual customer specifications. typical applications moisture seperator reheaters HEAT EXCHANGERS feedwater tubes STAToR BARS industries predominantly using this grade nuclear and power GENERAL ENGINEERING Technical Data mechanical properties physical properties (Room Temperature) chemical composition (% by weight) Disclaimer: The information contained within this data sheet is for guidance only and is not intended for warranty of individual application - express or implied. AMETEK SPECIALTY METAL PRODUCTS

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