What is asme sa240 type 304h?

 

WE ARE ASME SA 240 Type 304H Stainless Steel Plate Supplier

 

When your project demands a material with enhanced high-temperature strength, excellent corrosion resistance, and reliable performance in demanding environments, ASME SA 240 Type 304H stainless steel plate is an exceptional choice. Supplied by Gangsteel, a leading exporter of stainless steel plates and coils in China, this high-carbon austenitic stainless steel is renowned for its superior ASME SA 240 Type 304H creep resistance and durability, making it ideal for heat exchangers, boiler components, and petrochemical applications.

Gangsteel offers ASME SA 240 Type 304H stainless steel plate, sheet, coil, bar, and custom components, fully compliant with ASME SA240 and ASTM A240 standards. With a minimum stock of 600 tons and advanced processing capabilities, we ensure fast delivery and customization for global clients.

This page provides detailed insights into the ASME SA 240 Type 304H chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASME SA 240 Type 304H price per kg. Explore our ASME SA240 stainless steel plate portfolio for related grades like ASME SA240 Gr 304, ASME SA240 Gr 304L, and ASME SA240 Gr 316H.

 

Why Choose ASME SA 240 Type 304H Stainless Steel Plate?

 

ASME SA 240 Type 304H, also known as UNS S30409, is a high-carbon variant of the standard 304 stainless steel, offering improved high-temperature strength and creep resistance. With 18.0-20.0% chromium and 8.0-10.5% nickel, plus a controlled carbon content (0.04-0.10%), it provides excellent oxidation resistance and maintains structural integrity in temperatures up to 870°C (1598°F).

Key benefits of ASME SA 240 Type 304H plate include:

• Enhanced High-Temperature Strength: Higher carbon content improves creep and rupture strength, making it suitable for boiler and heat exchanger applications.
• Excellent Corrosion Resistance: Resists oxidation and corrosion in mild to moderate environments, similar to ASME SA240 Gr 304 but with better performance at elevated temperatures.
• Good Weldability and Formability: Low risk of sensitization due to controlled carbon, ensuring reliable welding for fabrication.
• Cost-Effective Solution: A budget-friendly option for high-temperature applications, outperforming carbon steels and offering longevity in service.

Case Study: A petrochemical plant in the UAE utilized ASME SA 240 Type 304H plate for heat exchanger tubes, achieving a 30% increase in service life due to its superior creep resistance and corrosion performance.

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ASME SA 240 Type 304H Chemical Composition

 

The ASME SA 240 Type 304H chemical composition is optimized for high-temperature strength, corrosion resistance, and weldability, compliant with ASME SA240 standards.

Element	Percentage (%)
Chromium (Cr)	18.0 – 20.0
Nickel (Ni)	8.0 – 10.5
Carbon (C)	0.04 – 0.10
Manganese (Mn)	≤ 2.0
Silicon (Si)	≤ 0.75
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.03
Iron (Fe)	Balance (~70%)

Note: The elevated carbon content enhances high-temperature strength and creep resistance, while low sulfur improves formability. This makes ASME SA 240 Type 304H a superior option over ASME SA240 Gr 304L for applications involving sustained high temperatures.

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ASME SA 240 Type 304H Mechanical Properties

 

The ASME SA 240 Type 304H mechanical properties offer excellent strength, ductility, and creep resistance at elevated temperatures, making it suitable for high-temperature applications.

Property	Value at 20°C	Value at 540°C (1000°F)
Tensile Strength (MPa)	≥ 515 (75 ksi)	≥ 380 (55 ksi)
Yield Strength (MPa)	≥ 205 (30 ksi)	≥ 170 (25 ksi)
Elongation (%)	≥ 40	≥ 45
Hardness (HRB)	≤ 92	-
Density	8.00 g/cm³ (0.289 lb/in³)	-

Note: Solution annealing at 1040-1120°C (1904-2048°F) optimizes UNS S30409 mechanical properties for creep resistance and corrosion performance. Contact Gangsteel at admin@gangsteel.com for a detailed ASME SA 240 Type 304H technical data sheet.

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ASME SA 240 Type 304H Specifications and Forms

 

Gangsteel provides ASME SA 240 Type 304H stainless steel plate, sheet, coil, bar, and custom components to meet your project’s needs, compliant with ASME SA240 and ASTM A240 standards:

7.1 Plate and Sheet

• Thickness: 0.5 mm to 100 mm (plate), 0.1 mm to 6 mm (sheet)
• Width: Up to 4200 mm
• Length: 2000 mm to 12000 mm (or coiled for sheet)
• Surface Finish: Hot-rolled, cold-rolled, annealed, pickled, 2B, No.1, No.4, BA, or customized
• Standards: ASME SA240, ASTM A240
• Applications: ASME SA 240 Type 304H plate for boiler components, UNS S30409 sheet for heat exchangers

7.2 Coil

• Thickness: 0.1 mm to 6 mm
• Width: Up to 2000 mm
• Standards: ASME SA240, ASTM A240
• Applications: Continuous production for welded tubes and pipes

7.3 Bar

• Diameter: 6 mm to 500 mm
• Length: Up to 12000 mm
• Finish: Hot-rolled, cold-drawn, centerless ground
• Standards: ASTM A479, ASME SA-479
• Applications: ASME SA 240 Type 304H bar for high-temperature fasteners

7.3 Custom Components

• Types: Flanges (ASME B16.5), fittings, CNC-machined parts, stainless cutting sheet part
• Tolerances: ±0.05 mm for precision components
• Applications: Tailored solutions for petrochemical and power generation industries

Note: Need a specific size or finish? Gangsteel offers custom solutions, including precision cutting and heat treatments, to meet ASME SA240 requirements. Contact us at admin@gangsteel.com for bespoke ASME SA 240 Type 304H material specifications.

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Applications of ASME SA 240 Type 304H Stainless Steel Plate

 

ASME SA 240 Type 304H stainless steel plateis designed for high-temperature applications where creep resistance is essential. Key ASME SA 240 Type 304H applications include:

• Power Generation: ASME SA 240 Type 304H plate for boiler components and superheaters.
• Petrochemical: UNS S30409 sheet for heat exchangers and reactors.
• Chemical Processing: ASME SA 240 Type 304H bar for fittings in high-temperature environments.
• Oil and Gas: Piping and equipment exposed to elevated temperatures.
• Aerospace: Components requiring high-temperature strength.

Case Study: A refinery in Saudi Arabia implemented ASME SA 240 Type 304H plate for heat exchanger tubes, extending service life by 30% due to its enhanced creep resistance.

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ASME SA 240 Type 304H vs Related Grades

 

To help you select the best grade, here’s a comparison of ASME SA 240 Type 304H with ASME SA240 Gr 304, ASME SA240 Gr 316H, and ASME SA240 Gr 347H:

Property	ASME SA 240 Type 304H (S30409)	ASME SA240 Gr 304 (S30400)	ASME SA240 Gr 316H (S31609)	ASME SA240 Gr 347H (S34709)
UNS Number	S30409	S30400	S31609	S34709
Type	Austenitic	Austenitic	Austenitic	Austenitic
Nickel Content	8.0-10.5%	8.0-10.5%	10.0-14.0%	9.0-13.0%
Chromium Content	18.0-20.0%	18.0-20.0%	16.0-18.0%	17.0-19.0%
Carbon Content	0.04-0.10%	≤ 0.08%	0.04-0.10%	0.04-0.10%
Molybdenum Content	-	-	2.0-3.0%	-
Corrosion Resistance	Good in mild environments	Good in mild environments	Excellent in chlorides	Good, intergranular
Strength	High at high temps	Moderate	High at high temps	High at high temps
Temp Range	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 850°C (1562°F)
Cost (USD/kg)	5-10	5-10	6-12	8-15
Applications	Heat exchangers, boilers	General, food industry	Marine, chemical	Petrochemical, aerospace

• ASME SA 240 Type 304H vs ASME SA240 Gr 304: ASME SA 240 Type 304H offers better creep resistance for high-temperature applications, while ASME SA240 Gr 304 is suitable for general uses with similar corrosion resistance.
• ASME SA 240 Type 304H vs ASME SA240 Gr 316H: ASME SA 240 Type 304H is cost-effective for mild corrosion, while ASME SA240 Gr 316H provides superior resistance in chloride environments due to molybdenum.
• ASME SA 240 Type 304H vs ASME SA240 Gr 347H: ASME SA 240 Type 304H offers good high-temperature performance, while ASME SA240 Gr 347H is stabilized for intergranular corrosion resistance in petrochemical applications.

Conclusion: Choose ASME SA 240 Type 304H for creep-resistant high-temperature applications, ASME SA240 Gr 304 for general corrosion resistance, ASME SA240 Gr 316H for enhanced chloride resistance, or ASME SA240 Gr 347H for stabilized high-temperature uses.

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ASME SA 240 Type 304H Equivalent Materials

 

ASME SA 240 Type 304Haligns with international standards for global compatibility.

Standard	Grade
UNS	S30409
W.Nr.	1.4948
EN	X6CrNi18-10
JIS	SUS 304H
GB	07Cr19Ni10
ASTM	A240
ASME	SA240

Note: ASME SA 240 Type 304H equivalent grades comply with ASME SA240, JIS, and GB standards, offering interchangeability with ASME SA240 Gr 304H for high-temperature applications.

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ASME SA 240 Type 304H Allowable Stress

 

The allowable stress values for ASME SA 240 Type 304H, per ASME BPVC Section II, Part D, ensure reliable performance in high-temperature applications.

Temperature (°C)	Allowable Stress (MPa)
100	150
200	140
300	130
400	120
500	110
600	100

Note: These values ensure ASME SA 240 Type 304H performs reliably in heat exchangers and boiler components under elevated temperatures.

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ASME SA 240 Type 304H Price

The ASME SA 240 Type 304H price per kg ranges from USD 5-10 per kg (FOB), influenced by:

• Alloy Content: Controlled carbon (0.04-0.10%) enhances high-temperature properties without significantly increasing costs compared to ASME SA240 Gr 316H.
• Market Demand: Demand in petrochemical and power generation industries drives UNS S30409 price.
• Product Form: ASME SA 240 Type 304H plate may cost more than sheet due to processing complexity.
• Global Supply Chain: Freight and availability impact ASME SA 240 Type 304H cost.

For a precise ASME SA 240 Type 304H price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.

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Related Stainless Steel Grades

 

Gangsteel offers a wide range of ASME SA240 stainless steel plate grades to complement ASME SA 240 Type 304H for various applications:

• ASME SA240 Gr 304: Versatile for general industries with good corrosion resistance.
• ASME SA240 Gr 316H: High-temperature strength for chemical processing.
• ASME SA240 Gr 347H: Enhanced creep resistance for high-temperature applications.
• ASME SA240 Gr 310H: High-temperature resistance for furnaces.
• ASME SA240 Gr 309H: High-temperature strength for furnaces.
• ASME SA240 Gr 317: High corrosion resistance for chemical processing.
• ASME SA240 Gr 904L: Superior sulfuric acid resistance for chemical applications.
• ASME SA240 Gr 334: High-temperature resistance for heating elements.
• ASME SA240 Gr 347: Stabilized for high-temperature corrosion resistance.
• ASME SA240 Gr 348H: High-carbon for enhanced high-temperature strength.
• ASME SA240 Gr 201: Cost-effective for general applications.
• ASME SA240 Gr 201L: Cost-effective for decorative and structural applications.
• ASME SA240 Gr 201LN: Nitrogen-enhanced for structural and cryogenic applications.
• ASME SA240 Gr 202: General corrosion resistance for decorative uses.
• ASME SA240 Gr 301: High strength for springs and fasteners.
• ASME SA240 Gr 301L: Low-carbon for improved weldability.
• ASME SA240 Gr 301LN: Nitrogen-enhanced for strength and weldability.
• ASME SA240 Gr 302: General-purpose austenitic stainless steel.
• ASME SA240 Gr 305: High nickel for deep drawing applications.
• ASME SA240 Gr 309CB: High-temperature corrosion resistance.
• ASME SA240 Gr 309H: High-temperature strength for furnaces.
• ASME SA240 Gr 309HCB: Enhanced high-temperature performance.
• ASME SA240 Gr 309S: Corrosion resistance for high-temperature applications.
• ASME SA240 Gr 310CB: High-temperature strength with columbium.
• ASME SA240 Gr 310HCB: Enhanced high-temperature performance.
• ASME SA240 Gr 310MOLN: Nitrogen-enhanced for urea production.
• ASME SA240 Gr 310S: High-temperature corrosion resistance.
• ASME SA240 Gr 316CB: Columbium-stabilized for weldability.
• ASME SA240 Gr 316H: High-temperature strength for chemical processing.
• ASME SA240 Gr 316L: Low-carbon for enhanced weldability.
• ASME SA240 Gr 316LN: Nitrogen-enhanced for strength and corrosion resistance.
• ASME SA240 Gr 316N: High strength for structural applications.
• ASME SA240 Gr 316Ti: Titanium-stabilized for high-temperature weldability.
• ASME SA240 Gr 317LM: Cost-effective corrosion resistance for acidic environments.
• ASME SA240 Gr 317LMN: Nitrogen-enhanced for improved strength and corrosion resistance.
• ASME SA240 Gr 405: Ferritic for heat-resistant applications.
• ASME SA240 Gr 409: Cost-effective for automotive exhaust systems.
• ASME SA240 Gr 410: Martensitic for high-strength applications.
• ASME SA240 Gr 410S: Low-carbon martensitic for improved weldability.
• ASME SA240 Gr 429: Ferritic for corrosion and heat resistance.
• ASME SA240 Gr 430: Ferritic for decorative and appliance applications.
• ASME SA240 Gr 434: Ferritic with molybdenum for enhanced corrosion resistance.
• ASME SA240 Gr 436: Ferritic for automotive and corrosion-resistant applications.
• ASME SA240 Gr 439: Ferritic for exhaust systems and appliances.
• ASME SA240 Gr 444: Ferritic with high corrosion resistance for water tanks.

Note: These grades complement ASME SA240 Type 304N in high-strength, chemical, and power generation applications. Contact Gangsteel for a full catalog to find the perfect material for your project.

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FAQ

Q: What is the difference between ASME SA 240 Type 304 and ASME SA240 Gr 304H?

A: ASME SA 240 Type 304 is standard for general applications, while ASME SA240 Gr 304H has higher carbon for enhanced high-temperature strength and creep resistance.

Q: Is ASME SA 240 Type 304 suitable for welding?

A: Yes, ASME SA 240 Type 304 has excellent weldability, but for heavy sections or corrosive service, use low-carbon variants like ASME SA240 Gr 304L to avoid sensitization.

Q: How does the price of ASME SA 240 Type 304 compare to ASME SA240 Gr 316?

A: ASME SA 240 Type 304 is typically 15-20% less expensive than ASME SA240 Gr 316, making it a cost-effective option for mild corrosion environments.

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Contact Us

For ASME SA 240 Type 304 stainless steel plate quotes, technical data sheets, or custom solutions, contact Gangsteel at admin@gangsteel.com. Explore our ASME SA240 stainless steel plate portfolio for more options.

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