Heat-Resistant 304H SS Plate For Furnace Components & Pressure Vessels Annealed & Pickled Surface
Products Specification
| Products Name |
304H Stainless Steel Plate |
| Main Grades |
Stainless Steel J1, J2, J4, 201, 202, 301, 304, 304H, 304L, 309, 309S, 310, 310S, 316, 316L, 316TI, 321, 321H, 347, 409, 410, 410S, 420, 430, 441, 904L,630,631,254SMO,253MA,2205,2507.etc |
| Thickness |
3.0 - 80.0mm |
| Width |
1250mm,1500mm ,1800mm,2000mm, or custom other size as request |
| Length |
2000mm, 2440mm, 3000mm, 5800mm, 6000mm, AS PER CUSTOMER’S REQUIREMENT |
| Type of Material |
Laser Cutting |
| Form |
Plate / coil |
| Test Certificate |
Yes. |
| Finish |
NO.1, 2B, 2D, 2H, 2R, No.4, HAIRLINE, SCOTCH BRITE, SATIN FINISH, NO.8, BA. |
| Brand |
TISCO, LISCO,BAOSTEEL , POSCO, JISCO |
304H stainless steel is a variant of the widely used 304 stainless steel, distinguished by its higher carbon content (0.04-0.10% vs. 0.08% maximum in 304). Classified under the austenitic stainless steel family, it offers enhanced high-temperature strength and creep resistance, making it suitable for applications requiring prolonged exposure to elevated temperatures. The "H" in its designation stands for "high carbon," which is intentional to maintain mechanical properties in high-temperature environments.
| Parameter |
304H Stainless Steel |
| Chemical Composition |
- Carbon (C): 0.04-0.10%
- Chromium (Cr): 18.0-20.0%
- Nickel (Ni): 8.0-10.5%
- Manganese (Mn): ≤2.0%
- Silicon (Si): ≤1.0%
- Phosphorus (P): ≤0.045%
- Sulfur (S): ≤0.030% |
| Mechanical Properties |
- Tensile Strength: ≥515 MPa
- Yield Strength (0.2% offset): ≥205 MPa
- Elongation at Break: ≥40%
- Hardness: ≤200 HB |
| Physical Properties |
- Density: 7.93 g/cm³
- Melting Point: 1398-1454°C
- Thermal Conductivity: ~16 W/m·K at 100°C
- Coefficient of Thermal Expansion: 17.2×10⁻⁶/°C (20-100°C) |
| Standards Compliance |
- ASTM A240, A276, A312
- EN 10088-2: X5CrNi18-10
- JIS G4303: SUS304H |
304H stainless steel is available in various forms to suit different industrial needs:
- Sheets and Plates: Used for structural components, heat exchangers, and pressure vessels.
- Bars and Rods: Includes round, square, and hexagonal bars for machining into shafts, bolts, or gears.
- Tubes and Pipes: Seamless or welded, suitable for high-temperature fluid transport (e.g., in boilers or chemical plants).
- Wire and Mesh: Used in filters, screens, or architectural applications requiring corrosion resistance.
- Fittings and Forgings: Custom components for high-temperature systems, such as flanges or valves.
-
High-Temperature Resistance
- Maintains strength and dimensional stability at temperatures up to ~870°C, making it ideal for applications where 304 stainless steel might lose mechanical properties.
- Reduced risk of creep deformation under prolonged heat exposure.
-
Corrosion Resistance
- Similar to 304, it offers excellent resistance to atmospheric corrosion, mild acids, and alkaline solutions.
- Not suitable for highly corrosive environments (e.g., seawater or chlorides) without additional protection.
-
Weldability and Formability
- Good weldability, though post-weld annealing may be needed to minimize carbide precipitation (sensitization) in critical applications.
- Can be cold-formed into complex shapes, though higher carbon content slightly reduces ductility compared to 304.
-
Non-Magnetic and Hygienic
- Austenitic structure makes it non-magnetic, suitable for applications near magnetic fields.
- Smooth surface finish allows easy cleaning, making it usable in food processing or pharmaceutical industries.
304H stainless steel is valued in industries where high-temperature performance is critical:
- Power Generation: Boiler components, superheaters, and heat exchangers in thermal power plants.
- Petrochemical and Refining: Reactors, distillation columns, and pipelines for processing high-temperature fluids.
- Aerospace and Automotive: Exhaust systems, engine components, and parts exposed to combustion byproducts.
- Heat Treatment Equipment: Furnace parts, trays, and fixtures for heat-treating processes.
- Industrial Furnaces: Components in kilns, ovens, and incinerators operating at elevated temperatures.
- Chemical Processing: Vessels and tanks for storing or processing chemicals at high temperatures.
- 304 vs. 304H: 304H’s higher carbon content enhances high-temperature strength but slightly reduces corrosion resistance (due to potential carbide precipitation if not properly processed).
- 304H vs. 316H: 316H adds molybdenum (2-3%), improving corrosion resistance in harsh environments (e.g., seawater or acids), while 304H prioritizes cost-effectiveness and general high-temperature strength.
-
To avoid sensitization (carbide precipitation at grain boundaries), post-weld heat treatment may be required for critical applications.
-
Regular cleaning with non-abrasive agents helps maintain corrosion resistance in aggressive environments.
-
When selecting 304H, ensure the application’s temperature and corrosion requirements align with its properties to maximize service life.
![]()
![]()
![]()
![]()
