304H Stainless Steel: High-Carbon Grade For Elevated Temperature Strength

Overview: 304H is the high-carbon variant of 304 stainless steel, designed specifically for high-temperature applications. Its higher carbon content enhances creep resistance and strength at elevated temperatures, making it suitable for continuous service in high-heat environments.

Chemical Composition (wt%): Chromium (Cr): 18.0-20.0; Nickel (Ni): 8.0-11.0; Carbon (C): 0.04-0.10; Manganese (Mn): ≤2.00; Silicon (Si): ≤1.00; Phosphorus (P): ≤0.045; Sulfur (S): ≤0.030; Iron (Fe): Balance.

Typical Mechanical Properties (Annealed Condition): Tensile Strength: ≥515 MPa; Yield Strength: ≥205 MPa; Elongation: ≥40%; Hardness (Brinell): ≤201 HB.

Core Advantages: Enhanced creep resistance and high-temperature strength (suitable for 500-800°C continuous service); good formability and weldability; austenitic and non-magnetic; better high-temperature stability than standard 304 and 304L.

Applications: Boiler components, heat exchanger tubes, furnace parts, high-temperature structural and pressure-containing equipment, industrial furnaces, and steam pipelines operating at elevated temperatures.

Equivalent Grades: UNS S30409; EN 1.4307; JIS SUS304H; GB/T 07Cr19Ni10.

Stainless Steel Suppliers

If you have project requirements for stainless steel, we welcome your order. GNEE has a large inventory of popular products for you to choose from. It can be processed into various practical product forms, including plates, coils, tubes, bars, wires, etc. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.Email: info@gneestainless.com

 

Testing and Documentation: Factory test certificate, EN 10204 3.1, chemical report, mechanical report, destructive testing report, non-destructive testing report, PMI test report, visual inspection report, third-party inspection report, NABL certified laboratory report.
Packaging: Wooden crate packaging, bubble wrap packaging, steel strapping, or packaging according to customer requirements.