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310S Stainless Steel Sheet & Plate

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310S Stainless Steel Sheet Plate (1.4845)

310S stainless steel, designated as UNS S31008, is a low-carbon version of 310 stainless steel. It shares many of the same properties but has a reduced carbon content (less than 0.08%) to improve its weldability and resistance to sensitization, especially in high-temperature environments. Like 310, it contains high levels of chromium (25-27%) and nickel (20-22%), providing exceptional resistance to oxidation and heat, making it suitable for high-temperature applications that demand superior performance.

 

Key Features

  • High-Temperature Resistance: 310S stainless steel maintains its strength and oxidation resistance even at temperatures as high as 1100°C (2012°F) in continuous service, making it ideal for extreme heat environments.
  • Corrosion Resistance: This grade exhibits excellent resistance to oxidation and corrosion, especially in environments with elevated temperatures. It is less prone to intergranular corrosion compared to its higher-carbon counterpart, 310, due to the reduced carbon content.
  • Mechanical Properties: With good tensile strength (~520 MPa) and excellent ductility, 310S provides reliability under thermal stress and mechanical loads.

 

Technical Specifications

  • UNS Number: S30400
  • DIN/EN Designation: 1.4845

Available Thickness

3/16″1/4″5/16″3/8″1/2″5/8″3/4″1″
4.8mm6.3mm7.9mm9.5mm12.7mm15.9mm19mm25.4mm
1 1/4″1 1/2″1 3/4″2″2 1/4″2 1/2″3″
31.8mm38.1mm44.5mm50.8mm57.2mm63.5mm76.2mm
310s-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

Worldwide Equivalent Grade of 310S

Country
Standard
Grade
United States
ASTM/ASME
310
European Union
EN
X15CrNi25-20
Germany
DIN
1.4845
Japan
JIS
SUS 310S
United Kingdom
BS
310S
France
AFNOR
Z15CN25-20
Russia
GOST
40Kh25N20

Corrosion Resistance

  • Oxidation Resistance: The high chromium content (approximately 25%) of 310S provides outstanding resistance to oxidation at elevated temperatures. This allows the material to perform well in environments where continuous exposure to temperatures up to 1,200°C (2,192°F) is expected, without significant deterioration.
  • Corrosion in Sulfur Dioxide: 310S exhibits good resistance to sulfur dioxide and other sulfur-containing gases, which can be highly corrosive at high temperatures. This makes it suitable for use in environments where sulfuric acid or sulfur dioxide might be present.
  • Resistance to Chloride Stress-Corrosion Cracking: While 310S is not as resistant to chloride-induced stress-corrosion cracking as some other alloys, its chromium and nickel content still provides a level of resistance. For environments with high chloride concentrations, additional protective measures or alloy choices may be necessary.
  • Resistance to High-Temperature Corrosion: In addition to general corrosion resistance, 310S is designed to handle high-temperature corrosion scenarios, such as scaling and carburization. Its stable microstructure helps maintain integrity even under harsh conditions.

Chemical Composition of Stainless Steel Plate 310S

ElementComposition Range (%)
Chromium (Cr)24.0 – 26.0
Nickel (Ni)19.0 – 22.0
Carbon (C)≤ 0.08
Manganese (Mn)≤ 2.0
Silicon (Si)≤ 1.5
Phosphorus (P)≤ 0.045
Sulfur (S)≤ 0.03

Physical Properties for Stainless Steel Plate 310S

PropertyValue
Density7.80 g/cm³
Melting Point1,400 – 1,500°C (2,552 – 2,732°F)
Thermal Conductivity14.8 W/m·K
Specific Heat Capacity500 J/kg·K
Modulus of Elasticity200 – 210 GPa (29 – 30 x 10³ ksi)
Poisson’s Ratio0.27 – 0.30
Thermal Expansion16.0 x 10⁻⁶ /K (20 – 100°C)

Mechanical Properties for Stainless Steel Plate 310S

PropertyValue
Tensile Strength515 – 725 MPa (75 – 105 ksi)
Yield Strength205 MPa (30 ksi)
Elongation40% (in 50 mm / 2 in)
Hardness (Rockwell B)85 – 95 HRB
Modulus of Elasticity200 – 210 GPa (29 – 30 x 10³ ksi)
Poisson’s Ratio0.27 – 0.30
Reduction of Area55%

Fabrication Data

  • Forming: Stainless steel 310S can be cold formed using conventional methods. Hot forming is also possible but requires careful control of temperature to prevent unwanted changes in microstructure.
  • Welding: Suitable for welding using standard methods such as TIG, MIG, and SMAW. Use fillers with similar alloy composition to maintain corrosion resistance and mechanical properties.
  • Heat Treatment: Annealing is often performed at temperatures between 1040°C and 1150°C (1900°F – 2100°F) to relieve stresses and enhance properties. The material is then rapidly cooled.
  • Machining: 310S can be machined using standard tools, but due to its toughness, it may require specialised techniques to achieve the desired finish.

Conclusion

310S stainless steel sheet plate is an excellent choice for applications demanding exceptional performance at high temperatures and in corrosive environments. Its combination of high-temperature resistance, corrosion resistance, and weldability makes it a valuable material in various industries.

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