Product Information: 304H Stainless Steel Plate

1. Material Grade:
304H Stainless Steel (UNS S30409, ASTM A240/A240M, ASME SA-240)

2. Overview:
304H is a high-carbon variation of the classic 304 austenitic stainless steel, specifically designed for enhanced strength and creep resistance at elevated temperatures (typically above 500°C / 932°F). The "H" denotes higher carbon content (0.04–0.10%), which stabilizes the structure against sensitization and ensures superior performance in high-heat applications like pressure vessels, boilers, and heat exchangers. It retains excellent corrosion resistance, formability, and weldability.

3. Key Features & Benefits:

• High-Temperature Strength: Optimized for sustained service up to 815°C (1500°F).

• Creep Resistance: Minimizes deformation under mechanical stress at elevated temperatures.

• Corrosion Resistance: Resists oxidation, scaling, and general corrosion in acidic/caustic environments.

• Austenitic Structure: Non-magnetic, ductile, and easy to fabricate/weld.

• H-Grade Compliance: Meets ASME Boiler and Pressure Vessel Code requirements for high-temperature use.

4. Chemical Composition (Typical % Weight):

5. Mechanical Properties (Room Temperature):

• Tensile Strength: ≥515 MPa (75 ksi)

• Yield Strength (0.2% Offset): ≥205 MPa (30 ksi)

• Elongation: ≥40% (in 50mm)

• Hardness (Brinell): ≤201 HB

• Density: 8.0 g/cm³

6. High-Temperature Performance:

• Max Continuous Service Temp: 870°C (1600°F)

• Max Intermittent Service Temp: 925°C (1700°F)

7. Available Forms & Dimensions:

• Thickness: 3mm – 100mm (Custom sizes available)

• Width: 1000mm, 1219mm (48"), 1500mm, 2000mm (Custom widths)

• Length: 2000mm, 2438mm (96"), 3000mm, 6000mm (Custom lengths)

• Form: Hot-Rolled (HR) or Cold-Rolled (CR) Plates

8. Surface Finishes:

• Hot-Rolled: No.1, Scale-Free Annealed

• Cold-Rolled: 2B (Standard Bright), BA (Mirror Bright), No.4 (Brushed), HL (Hairline)

• Special: Pickled, Passivated, Sandblasted

9. Standards & Certifications:

• ASTM A240/A240M, ASME SA-240

• EN 10028-7: X6CrNi18-10

• ISO 9445, JIS G4304

• Material Test Certificates (MTC) per EN 10204 3.1/3.2

10. Applications:

• Boiler & Pressure Vessel Components

• Heat Exchangers & Condensers

• High-Temperature Pipelines & Valves

• Power Generation Systems (Gas Turbines)

• Chemical Processing Equipment

• Furnace Parts & Heat Treatment Fixtures

11. Fabrication Notes:

• Welding: Use 308H or 347 filler metal; pre/post-weld heat treatment not typically required.

• Machining: Low work-hardening rate allows good machinability (use sharp tools + coolants).

• Forming: Excellent ductility supports bending, stamping, and deep drawing.

12. Packaging:

• Wooden crates/pallets with waterproof wrapping.

• Edge protectors and anti-rust paper for corrosion prevention.

Why Choose 304H Plate?

Ideal for critical applications demanding heat resistance + corrosion protection, 304H delivers unmatched reliability in extreme conditions. Its controlled carbon content prevents carbide precipitation during welding/heat exposure, ensuring long-term structural integrity.

Customization Options:

• Precision cutting (waterjet, laser, plasma)

• Beveled edges for welding

• Non-standard dimensions & finishes

Contact us for quotes, technical specs, or material certifications!