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310H Stainless Steel Sheet & Plate

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310H Stainless Steel Sheet & Plate (UNS S31009)

310H stainless steel is an alloy known for its excellent resistance to oxidation and corrosion at high temperatures. It is commonly used in industries where materials are subjected to harsh environments, particularly at temperatures exceeding 1000°F (537°C). 310H stainless steel is an ideal choice for applications requiring durability and heat resistance, such as in the petrochemical, power generation, and heat exchanger industries.

 

Key Features of 310H Stainless Steel Sheet & Plate:

  1. High-Temperature Resistance: 310H stainless steel is designed for use in high-temperature environments. It is capable of withstanding temperatures up to 2100°F (1149°C) in intermittent service and is commonly used in furnaces, kilns, and incinerators.
  2. Corrosion Resistance: The alloy is highly resistant to a range of corrosive agents, making it ideal for high-temperature applications where corrosion from sulfur, chlorides, and other harmful chemicals is a concern.
  3. Excellent Weldability: 310H stainless steel offers good weldability, especially in the annealed condition. Its low carbon content minimizes the risk of carbide precipitation during welding, enhancing its overall performance and longevity in welded applications.
  4. Strength and Durability: It provides good mechanical strength at elevated temperatures, offering long-term durability in industrial applications where steel materials face continuous stress.
  5. Resistance to Scaling: 310H is resistant to scaling and oxidation in environments where other materials may fail due to heat exposure. This makes it particularly useful in applications like heat exchangers and combustion systems.
  6. Formability: Available in sheet and plate form, 310H can be easily fabricated into complex shapes and sizes for diverse applications, ensuring versatility in industrial designs.

 

Technical Specifications

  • UNS Number: S31009

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
310h-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

  • Oxidation Resistance: The high chromium (24.0-26.0%) and nickel (19.0-22.0%) content in Stainless Steel Plate 310H enhances its resistance to oxidation. This makes it particularly suitable for applications involving continuous high temperatures and exposure to oxidizing agents.
  • Sulfuric Acid Resistance: Stainless Steel Plate 310H is well-suited for environments with sulfurous gases. Its resistance to sulfuric acid and other sulfur-containing compounds ensures longevity and reliability in harsh conditions.
  • Acid Resistance: The alloy’s composition provides robust resistance against acidic environments, including dilute acids. This makes it a reliable choice for chemical processing and other applications where exposure to acids is a concern.
  • Corrosion in High-Temperature Conditions: One of the standout features of 310H is its ability to maintain resistance to corrosion even at elevated temperatures. This property is crucial for components in high-temperature applications such as furnace parts, heat exchangers, and gas turbines.

Chemical Composition of Stainless Steel Plate 310H

ElementContent Range (%)
Chromium (Cr)24.0 – 26.0
Nickel (Ni)19.0 – 22.0
Carbon (C)≤ 0.25
Manganese (Mn)≤ 2.0
Silicon (Si)≤ 1.5
Phosphorus (P)≤ 0.045
Sulfur (S)≤ 0.03

Physical Properties for Stainless Steel Plate 310H

PropertyValue
Density7.8 g/cm³
Melting Point1400 – 1450°C
Thermal Conductivity16.2 W/m·K
Specific Heat Capacity500 J/kg·K
Modulus of Elasticity200 GPa
Poisson’s Ratio0.3
Thermal Expansion Coefficient15.7 µm/m·K

Mechanical Properties for Stainless Steel Plate 310H

PropertyValue
Tensile Strength520 MPa (minimum)
Yield Strength205 MPa (minimum)
Elongation35% (minimum)
HardnessBrinell 220 HB (maximum)
Modulus of Elasticity200 GPa
Impact Toughness27 J (minimum at -196°C)
Proof Strength205 MPa (minimum)
Reduction of Area45% (minimum)

Fabrication Data

Welding

  • Process Compatibility: Stainless Steel Plate 310H is weldable using common methods such as TIG (Tungsten Inert Gas), MIG (Metal Inert Gas), and Stick welding. The high chromium and nickel content contributes to good weldability.
  • Filler Material: Use filler materials such as ER310 or ENiCrFe-3 to match the composition of the base metal and maintain strength and corrosion resistance.
  • Preheating: Preheating is generally not required, but it can be beneficial to avoid thermal cracking in thicker sections.
  • Post-Weld Heat Treatment: For critical applications, post-weld heat treatment may be recommended to relieve stresses and improve mechanical properties.

Machining

  • Machining Techniques: Stainless Steel Plate 310H can be machined using standard techniques such as turning, milling, and drilling. Due to its hardness, carbide-tipped tools are often recommended.
  • Cutting: Plasma cutting, water jet cutting, and laser cutting are effective methods for cutting Stainless Steel Plate 310H. Ensure that cutting tools are sharp and well-maintained to achieve clean edges and minimize tool wear.
  • Tooling Recommendations: Use high-speed steel (HSS) or carbide tools. Lubricants and coolants can help to reduce tool wear and improve surface finish.

Heat Treatment

  • Annealing: Annealing can improve ductility and relieve internal stresses. Typical annealing temperatures for Stainless Steel Plate 310H range from 1040°C to 1150°C. Rapid cooling is generally recommended.
  • Hardening: Stainless Steel Plate 310H is not typically hardened by heat treatment. Its hardness is generally achieved through alloying elements and cold working.

Surface Finish

  • Polishing: The surface finish can be enhanced through polishing. Stainless Steel Plate 310H can achieve a high-quality finish suitable for aesthetic applications or where reduced surface roughness is required.
  • Cleaning: Regular cleaning helps maintain the corrosion-resistant properties of Stainless Steel Plate 310H. Use non-abrasive cleaning agents and methods to avoid damaging the surface.

Handling and Storage

  • Handling: Use appropriate lifting equipment and methods to prevent damage. Avoid dropping or mishandling, as this can cause surface imperfections or deformations.
  • Storage: Store Stainless Steel Plate 310H in a dry, clean environment to prevent contamination. Avoid contact with reactive materials that could lead to corrosion or staining.
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