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317 Stainless Steel Sheet & Plate

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317 Stainless Steel Sheet & Plate (UNS S31700, 1.4449)

317 stainless steel is a highly corrosion-resistant material, commonly used in environments that require resistance to both oxidation and corrosion, such as chemical processing, food production, and marine environments.


Key Features of 317 Stainless Steel Sheet & Plate:

  • Corrosion Resistance: Excellent resistance to a variety of corrosive conditions.
  • Strength: Offers better strength at high temperatures than 304 and 316 stainless steels.
  • Fabrication: Can be cold-worked or welded but is prone to work hardening.
  • Applications: Often used in food processing equipment, pharmaceutical machinery, heat exchangers, marine environments, and chemical containers.

Technical Specifications

  • UNS Number: S31700
  • DIN/EN Designation: 1.4449

Available Thickness

3/16″1/4″5/16″3/8″1/2″5/8″3/4″7/8″1″1 1/8″
4.8mm6.3mm7.9mm9.5mm12.7mm15.9mm19mm22.2mm25.4mm28.6mm
1 1/4″1 1/2″1 3/4″2″2 1/4″2 1/2″2 3/4″3″3 1/2″4″
31.8mm38.1mm44.5mm50.8mm57.2mm63.5mm69.9mm76.2mm88.9mm101.6mm
317-stainless-steel-sheet-plate

Application

  • Automotive
  • Chemical and Pharmaceutical
  • Fertilizer
  • Food Processing and Handling
  • Manufacturing
  • Mining
  • Oil & Gas
  • Phosphate Mining

Standard

  • ASTM A240 / A240M
  • ASTM A276 / A276M
  • ASTM A312 / A312M
  • ISO 15510
  • EN 10088-2
  • IN 10204
  • HE G4304
  • HE G4305
  • ASME SA240 / SA240M
  • ASME SA312 / SA312M

Corrosion Resistance

  • Chloride Corrosion Resistance: Stainless Steel 317L is highly resistant to chloride-induced pitting and crevice corrosion. The addition of molybdenum (3.0 – 4.0%) to its composition significantly improves its resistance to these types of corrosion, making it suitable for marine environments and applications involving chlorinated compounds.
  • Acid Resistance: This alloy exhibits excellent resistance to a wide range of acids, including sulfuric acid and phosphoric acid. Its low carbon content helps prevent carbide precipitation, which could otherwise compromise its resistance to acid attack.
  • Oxidation Resistance: Stainless Steel 317L performs well in high-temperature environments, with an oxidation resistance up to approximately 870°C (1600°F). This makes it suitable for applications involving intermittent exposure to elevated temperatures, such as in industrial processes and exhaust systems.
  • Stress Corrosion Cracking (SCC): The alloy’s composition reduces the susceptibility to stress corrosion cracking, which is particularly beneficial in applications where the material is subjected to tensile stress and corrosive environments simultaneously.
  • Crevice Corrosion: The superior resistance to crevice corrosion is achieved through the alloy’s molybdenum content, which enhances its protection against localized attack in stagnant or low-flow environments.
  • General Corrosion: Stainless Steel 317L demonstrates strong resistance to general corrosion in a variety of environments, including moderately aggressive chemicals and polluted atmospheres. This resistance is due to the alloy’s high chromium and nickel content, which forms a stable, protective passive film on the surface.

317 Chemical Composition

ElementRange (wt%)
Iron (Fe)Balance
Chromium (Cr)18.0 – 20.0
Nickel (Ni)11.0 – 15.0
Molybdenum (Mo)3.0 – 4.0
Manganese (Mn)0.0 – 2.0
Silicon (Si)0.0 – 1.0
Carbon (C)≤ 0.08
Phosphorus (P)≤ 0.045
Sulfur (S)≤ 0.030

317 Physical Properties

PropertyValue
Density~7.98 g/cm³ (7980 kg/m³)
Melting Point~1400 – 1450°C (2552 – 2642°F)
Thermal Conductivity~15.1 W/m·K
Specific Heat Capacity~500 J/kg·K
Young’s Modulus~200 GPa (29,000 ksi)
Poisson’s Ratio~0.27 – 0.30
Electrical Resistivity~0.72 x 10⁻⁸ Ω·m
Coefficient of Thermal Expansion~16.5 x 10⁻⁶ /°C (9.2 x 10⁻⁶ /°F)
Ultimate Tensile Strength~550 MPa (80 ksi)

317 Mechanical Properties

PropertyValue
Ultimate Tensile Strength~550 MPa (80 ksi)
Yield Strength~290 MPa (42 ksi)
Elongation~40%
Reduction of Area~60%
Hardness (Rockwell B)~85 – 95 HRB
Modulus of Elasticity (Young’s Modulus)~200 GPa (29,000 ksi)
Shear Strength~280 MPa (41 ksi)
Poisson’s Ratio~0.27 – 0.30
Fatigue Strength~275 MPa (40 ksi)
Impact ToughnessExcellent at room temperature and down to cryogenic temperatures

Fabrication Data

  • Welding: Can be welded using standard techniques, but preheating and post-weld heat treatment may be required for thicker sections to avoid sensitization.
  • Machining: Generally machinable, though it can be more challenging compared to some other stainless steels due to its higher hardness.
  • Forming: Can be cold-formed, but requires careful handling to avoid cracking.
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