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316

Grade 316L (UNS S31603, EN 1.4404) is molybdenum-bearing austenitic stainless steels, which is more resistant to general corrosion and pitting/crevice corrosion than the conventional chromium-nickel austenitic stainless steels such as Grade 304. The low carbon chemistry of 316L combined with an addition of nitrogen enables 316L to meet the mechanical properties of 316.

Grade 316L is often utilized in process streams containing chlorides or halides. The addition of molybdenum improves general corrosion and chloride pitting resistance. It also offers higher creep, stress-to-rupture, and tensile strength at elevated temperatures. In addition to excellent corrosion resistance and strength properties, the Grade 316L Cr-Ni-Mo alloys also provide excellent fabricability and formability which are typical of the austenitic stainless steels.

PROPERTIES

  Grade 316L may be considered for a wide variety of applications where one or more of the following properties are important:

  • Resists atmospheric corrosion, more resistant than Grade 304
  • Resists corrosion in polluted marine atmospheres
  • Heat Resistance
  • Heat Treatment
  • Prevention of product contamination
  • Resistance to oxidation
  • Easily welded and processed by standard shop fabrication practices.
  • Excellent formability
  • Hot and cold working
  • Beauty of appearance
  • Ease of cleaning
  • Good strength and toughness at cryogenic temperatures
  • Ready availability of a wide range of product forms
CH EMICAL C OMPO SITION AND PHYSICAL PROPERTIES FOR 316L
Item C% Si% Mn% P% S% Ni% Cr% Mo% N% Others
Min   ---- --- ---- ----- 10 16 2 -----  ---
Max 0.03 0.75 2 0.045 0.03 14 18 3 0.1 ---- 
Item Tensile Test Hardness Test Bend Test
0.2%Y.S. 1%Y.S. T.S. EL (%) HRB HV 180
Min 205 --- 420 22 --- ---  
Max N/mm2 --- N/mm2 --- 88 200 1.0t

APPLICATION

The high corrosion resistance of 316L allows for its use in widely range of industries, includes:

  • Food preparation equipment
  • Chemical processing for inks, rayons, photographic chemicals….
  • Laboratory benches and equipment
  • Rubber, plastics, pulp & paper machinery
  • Pollution control equipment
  • Boat fitting, value and pump trim
  • Heat exchangers
  • Pharmaceutical industries, surgical and medical implants, including pins, screws and orthopaedic implants
  • Condensers, evaporators and tanks
  • Architecture and marine applications
SPECIFICATIONS
  • ASTM A240M – Chromium and Chromium – Nickel Stainless Steel Plate, Sheet and Strip for Pressure Vessels and for General Applications.
  • ASTM 480M – General Requirements for Flat Rolled Stainless and Heat-Resisting Steel Plate, Sheet and Strip
  • EN 10088-2 (1.4404) – Stainless Steel Technical delivery conditions for sheet, plate and strip of corrosion resisting steels for general purposes
PRODUCT TYPES
  • Coil
  • Sheet
  • Strip

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