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Industrial 304H Stainless Steel Plate High Chromium-Nickel Content ASME SA240 Custom Sizes

Place of Origin	China
Brand Name	TISCO BAOSTEEL
Certification	ISO
Model Number	304H / S30409
Minimum Order Quantity	500 kgs
Price	1700- 2000 USD/Ton
Packaging Details	standard packing for export
Delivery Time	5 - 12 days based on the quantity
Payment Terms	T/T, Western Union
Supply Ability	20Ton per week

Product Details

Products	Stainless Steel Plate	Grade	304H / S30409
Thickness	3.0 - 80.0mm	Width	1500mm 1800mm 2000mm
Surface	NO.1	Brand	BAOSTEEL TISCO
Standard	ASTM A240/240M	Loading Port	Shanghai Port
Highlight	304H Stainless Steel Plate , ASME SA240 Stainless Steel Plate

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Product Description

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

Introduction

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.

Key Parameters

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

Product Types

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.

Key Characteristics

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.

Applications

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.

Comparison with 304 and 316 Stainless Steels

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.

Maintenance and Considerations

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.

Industrial 304H Stainless Steel Plate High Chromium-Nickel Content ASME SA240 Custom Sizes 0

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