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316h Stainless Steel Sheet & Plate

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316h Stainless Steel Sheet & Plate (UNS S31609,1.4919)

At DNYA Stainless Steel, we supply premium-quality 316H Stainless Steel Sheets & Plates, specially engineered for elevated-temperature applications where superior creep strength, corrosion resistance, and mechanical stability are essential. With its high carbon content, 316H (UNS S31609 / EN 1.4919) is widely used in high-pressure, high-temperature systems in industries such as petrochemicals, power generation, and heat exchangers.

If your project demands stainless steel that can withstand prolonged exposure to extreme heat and pressure, 316H is the ideal material for both structural integrity and corrosion resistance.

 

What is 316H Stainless Steel?

316H stainless steel is a higher-carbon variant of the standard 316 grade. It retains the excellent corrosion resistance and strength of 316 stainless steel but offers enhanced creep resistance and tensile strength at elevated temperatures, due to its increased carbon content (0.04%–0.10%).

 

316H is designed specifically for boilers, heat exchangers, superheaters, and pressure vessels, where high mechanical performance at temperatures above 500°C is critical. It conforms to ASTM A240 / EN 1.4919 and is approved for use in ASME Section VIII pressure vessels.

 

Key Features 

  • High-Temperature Strength
    Performs reliably under long-term exposure above 500°C.

  • Superior Creep Resistance
    Withstands pressure and stress at elevated temperatures.

  • Excellent Corrosion Resistance
    Resistant to pitting and crevice corrosion in chloride-rich, acidic conditions.

  • Good Fabrication & Weldability
    Suitable for standard forming and welding techniques.

  • Approved for Pressure Vessel Use
    Complies with ASME and ASTM standards for high-pressure equipment.

  • Non-Magnetic in Annealed Condition
    Slight magnetism may develop after cold work.

Available Thickness

3/8″1/2″5/8″3/4″1″
9.5mm12.7mm15.9mm19mm25.4mm
1 1/4″1 1/2″1 3/4″2″
31.8mm38.1mm44.5mm50.8mm
316h-stainless-steel-sheet-plate

Application

  • Chemical Processing
  • Aerospace
  • Power Generation
  • Oil and Gas
  • Food and Beverage Industry
  • Construction and Architecture
  • Pharmaceutical Industry

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

  • High Molybdenum Content: The inclusion of molybdenum in 316H enhances its resistance to corrosion, particularly in environments with chlorides or other halides. This makes it suitable for marine and coastal applications.
  • Pitting and Crevice Corrosion: 316H offers superior resistance to pitting and crevice corrosion compared to standard stainless steels. This is particularly important in environments where the material is exposed to saltwater or acidic conditions.
  • Oxidation Resistance: 316H stainless steel maintains its integrity and resists scaling even at high temperatures, thanks to its high chromium content. This makes it perfect for high-temperature applications.
  • Intergranular Corrosion: The high carbon content of 316H can sometimes lead to sensitization during welding. However, with proper heat treatment, this risk can be mitigated, ensuring the material remains resistant to intergranular corrosion.
  • Stress Corrosion Cracking: 316H is also resistant to stress corrosion cracking, especially in chloride environments. This property is crucial for applications where the material is under constant mechanical stress.

Chemical Composition for Stainless Steel Plate 316H

ElementComposition (%)
Chromium (Cr)16.0 – 18.0
Nickel (Ni)10.0 – 14.0
Molybdenum (Mo)2.0 – 3.0
Carbon (C)0.04 – 0.10
Manganese (Mn)≤ 2.0
Silicon (Si)≤ 0.75
Phosphorus (P)≤ 0.045
Sulfur (S)≤ 0.030
Nitrogen (N)≤ 0.10
Iron (Fe)Balance

Physical Properties for Stainless Steel Plate 316H

PropertyValue
Density7.98 g/cm³ (0.289 lb/in³)
Melting Point1371 – 1399°C (2500 – 2550°F)
Tensile Strength515 MPa (75 ksi) minimum
Yield Strength205 MPa (30 ksi) minimum
Elongation40% minimum in 50 mm
Hardness, Rockwell B95 maximum
Modulus of Elasticity193 GPa (28 x 10⁶ psi)
Thermal Conductivity16.3 W/m·K (112.8 BTU/hr·ft·°F) at 100°C
Specific Heat Capacity500 J/kg·K (0.12 BTU/lb·°F) at 0-100°C
Electrical Resistivity740 nΩ·m (29.1 μΩ·in) at 20°C

Mechanical Properties for Stainless Steel Plate 316H

PropertyValue
Tensile Strength515 MPa (75 ksi) minimum
Yield Strength205 MPa (30 ksi) minimum
Elongation40% minimum in 50 mm
Hardness, Rockwell B95 maximum
Modulus of Elasticity193 GPa (28 x 10⁶ psi)
Impact Toughness75 J (55 ft-lb) at room temperature (Charpy V-notch)

Fabrication Data

  • Machinability: Good, though slower compared to other grades due to its higher nickel and molybdenum content.
  • Weldability: Excellent; can be welded using conventional methods such as TIG, MIG, and stick welding. Preheating is generally not required, but post-weld heat treatment may be recommended in some cases.
  • Formability: Can be cold-formed with ease. However, it may work-harden quickly.
  • Heat Treatment: Solution annealing at 1010-1120°C (1850-2050°F), followed by rapid cooling, to restore corrosion resistance.
  • Corrosion Resistance: Superior resistance to pitting and crevice corrosion, particularly in chloride environments.

Conclusion:

316H stainless steel sheet and plate offer a superior combination of properties, making them ideal for demanding applications. Their excellent corrosion resistance, high-temperature strength, and good weldability make them a valuable material in various industries.

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For more information or to request a quote, contact us today to discuss how Stainless Steel Plate 304H can meet your specific project needs.