ASTM A240/ASME SA240 UNS S30409 Stainless Steel 304H Sheet

 

ASTM A240/ASME SA240 UNS S30409 Stainless Steel 304H Sheet for sales

 

For projects requiring high-temperature strength, corrosion resistance, and reliability, ASTM A240/ASME SA240 UNS S30409 Stainless Steel 304H Sheet is a top-tier choice.

As a premier uns stainless supplier, Gangsteel offers high-quality sa 240/a 240 uns s30409 sheets, plates, coils, bars, and custom components, all compliant with sa 240/a 240 uns stainless grades standards, including ASTM A240 and ASME SA240. With an inventory exceeding 600 tons and advanced processing capabilities, we ensure rapid delivery and tailored solutions for clients worldwide.

Gangsteel explores the ASTM A240/ASME SA240 UNS S30409 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASTM A240/ASME SA240 UNS S30409 price per kg.

Whether you're an engineer designing high-temperature chemical equipment or a procurement specialist sourcing for power generation systems, this article will clarify why 304H stainless steel is a trusted option. Explore our sa 240/a 240 uns stainless grades portfolio for related grades like sa 240/a 240 uns s30400, sa 240/a 240 uns s30403, and sa 240/a 240 uns s31600.

 

Why Choose ASTM A240/ASME SA240 UNS S30409 Stainless Steel 304H Sheet?

 

ASTM A240/ASME SA240 UNS S30409, commonly known as 304H stainless steel, is a high-carbon variant of 304 stainless steel, featuring 18.0-20.0% chromium and 8.0-10.5% nickel. The "H" stands for high carbon, which enhances creep resistance and strength at elevated temperatures up to 870°C (1598°F). This makes it ideal for applications requiring sustained high-temperature performance, such as in chemical processing, power generation, and petrochemical industries.

The high carbon content provides ASTM A240/ASME SA240 UNS S30409 stainless steel 304H sheet with superior strength compared to sa 240/a 240 uns s30400, while maintaining good corrosion resistance in mild environments. Its versatility makes it a reliable choice for demanding applications.

Key benefits of ASTM A240/ASME SA240 UNS S30409 stainless steel 304H sheet include:

• Enhanced High-Temperature Strength: Higher carbon content (0.04-0.10%) improves creep resistance, outperforming sa 240/a 240 uns s30400 in high-temperature environments.
• Good Corrosion Resistance: Resists corrosion in mild environments, suitable for chemical processing compared to sa 240/a 240 uns s20100.
• Cost-Effective: Offers a balance of performance and affordability compared to molybdenum-alloyed grades like sa 240/a 240 uns s31600.
• Good Weldability: Controlled carbon content supports welding, though sa 240/a 240 uns s30403 is preferred for heavy welding.

Case Study: A petrochemical plant in Saudi Arabia used sa 240/a 240 uns s30409 sheets for heat exchanger tubes, achieving a 25% longer service life due to its creep resistance compared to sa 240/a 240 uns s30400.

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ASTM A240/ASME SA240 UNS S30409 Chemical Composition

 

The ASTM A240/ASME SA240 UNS S30409 chemical composition is optimized for high-temperature strength, corrosion resistance, and weldability, compliant with sa 240/a 240 uns stainless grades standards.

The high carbon content (0.04-0.10%) enhances creep resistance, making it suitable for high-temperature applications, while the balanced chromium and nickel content provides good corrosion resistance in mild environments.

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%)

This composition makes ASTM A240/ASME SA240 UNS S30409 a superior choice for high-temperature applications compared to sa 240/a 240 uns s30403, which prioritizes weldability.

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ASTM A240/ASME SA240 UNS S30409 Mechanical Properties

 

The ASTM A240/ASME SA240 UNS S30409 mechanical properties provide excellent strength, ductility, and high-temperature performance, ideal for demanding applications.

These properties ensure that ASTM A240/ASME SA240 UNS S30409 stainless steel 304H sheet can withstand mechanical stresses in high-temperature environments while maintaining corrosion resistance. Solution annealing at 1010-1120°C (1850-2048°F) optimizes UNS S30409 mechanical properties for creep resistance and durability.

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	8.0 g/cm³ (0.289 lb/in³)	-

At Gangsteel, we’ve seen clients use sa 240/a 240 uns s30409 sheets in chemical reactors, where its high-temperature strength surpasses sa 240/a 240 uns s30400.

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ASTM A240/ASME SA240 UNS S30409 Specifications and Forms

 

As a trusted uns stainless supplier, Gangsteel supplies sa 240/a 240 uns s30409 sheets, plates, coils, bars, and custom components, compliant with sa 240/a 240 uns stainless grades standards:

Our advanced processing capabilities ensure precision and quality, meeting the diverse needs of global projects, from standard sizes to custom-cut components.

7.1 Sheet and Plate

• Thickness: 0.1 mm to 6 mm (sheet), 0.5 mm to 100 mm (plate)
• 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: ASTM A240, ASME SA240
• Applications: sa 240/a 240 uns s30409 sheets for chemical reactors, UNS S30409 plates for boiler components

7.2 Coil

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

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: ASTM A240/ASME SA240 UNS S30409 bars for high-temperature fittings

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 sa 240/a 240 uns stainless grades requirements. Contact us at admin@gangsteel.com for bespoke ASTM A240/ASME SA240 UNS S30409 material specifications.

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Applications of ASTM A240/ASME SA240 UNS S30409 Stainless Steel 304H Sheet

 

ASTM A240/ASME SA240 UNS S30409 stainless steel 304H sheetis designed for industries requiring high-temperature strength and corrosion resistance. Its high carbon content ensures durability in demanding environments, making it a preferred choice for critical applications.

Key ASTM A240/ASME SA240 UNS S30409 applications include:

• Petrochemical: sa 240/a 240 uns s30409 sheets for heat exchanger tubes and reactors.
• Power Generation: UNS S30409 plates for boiler components and superheaters.
• Chemical Processing: ASTM A240/ASME SA240 UNS S30409 bars for fittings in high-temperature environments.
• Oil and Gas: Piping and fittings for high-heat applications.
• Industrial Furnaces: Components requiring creep resistance.

Case Study: A power generation facility in India used sa 240/a 240 uns s30409 sheets for superheater tubes, extending service life by 20% due to its creep resistance compared to sa 240/a 240 uns s30400.

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ASTM A240/ASME SA240 UNS S30409 vs Related Grades

 

To aid in material selection, here’s a comparison of sa 240/a 240 uns s30409 with sa 240/a 240 uns s30400, sa 240/a 240 uns s30403, and sa 240/a 240 uns s31600:

This comparison highlights the unique advantages of each grade, helping you select the optimal material for your project requirements.

Property	ASTM A240/ASME SA240 UNS S30409	ASME SA240 UNS S30400	ASME SA240 UNS S30403	ASME SA240 UNS S31600
UNS Number	S30409	S30400	S30403	S31600
Type	Austenitic	Austenitic	Austenitic	Austenitic
Chromium Content	18.0-20.0%	18.0-20.0%	18.0-20.0%	16.0-18.0%
Nickel Content	8.0-10.5%	8.0-10.5%	8.0-12.0%	10.0-14.0%
Molybdenum Content	-	-	-	2.0-3.0%
Carbon Content	0.04-0.10%	≤ 0.08%	≤ 0.03%	≤ 0.08%
Corrosion Resistance	Good in mild environments	Good in mild environments	Good, enhanced weldability	Excellent in chlorides
Strength	High at high temps	Moderate	Moderate	Moderate
Temp Range	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)
Cost (USD/kg)	5-10	5-10	5-10	6-12
Applications	High-temp chemical, power generation	Food processing, architectural	Welded structures	Marine, chemical

• ASTM A240/ASME SA240 UNS S30409 vs ASME SA240 UNS S30400: S30409 offers enhanced creep resistance due to higher carbon, ideal for high-temperature applications, while sa 240/a 240 uns s30400 is standard for general corrosion resistance.
• ASTM A240/ASME SA240 UNS S30409 vs ASME SA240 UNS S30403: S30409 is optimized for high-temperature strength, while sa 240/a 240 uns s30403 provides superior weldability for heavy welding.
• ASTM A240/ASME SA240 UNS S30409 vs ASME SA240 UNS S31600: S30409 is cost-effective for mild environments, while sa 240/a 240 uns s31600 excels in chloride-rich settings due to molybdenum.

Conclusion: Choose sa 240/a 240 uns s30409 for high-temperature chemical and power generation applications, sa 240/a 240 uns s30400 for general uses, sa 240/a 240 uns s30403 for welded structures, or sa 240/a 240 uns s31600 for chloride resistance.

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ASTM A240/ASME SA240 UNS S30409 Equivalent Materials

 

ASTM A240/ASME SA240 UNS S30409aligns with international standards for global compatibility, ensuring seamless integration into projects worldwide.

The equivalent grades allow for flexibility in sourcing materials across different regions, making ASTM A240/ASME SA240 UNS S30409 a versatile choice for high-temperature applications.

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

Note: ASTM A240/ASME SA240 UNS S30409 equivalent grades comply with sa 240/a 240 uns stainless grades, JIS, and GB standards, offering interchangeability with sa 240/a 240 uns s30400 for general applications.

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ASTM A240/ASME SA240 UNS S30409 Allowable Stress

 

The allowable stress values for ASTM A240/ASME SA240 UNS S30409, per ASME BPVC Section II, Part D, ensure reliable performance in high-temperature applications.

These values reflect the material’s ability to withstand mechanical stresses at elevated temperatures, making it suitable for demanding environments like chemical reactors and boilers.

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

Note: These values ensure sa 240/a 240 uns s30409 performs reliably in high-temperature chemical reactors and boiler components.

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ASTM A240/ASME SA240 UNS S30409 Price

 

The ASTM A240/ASME SA240 UNS S30409 price per kg ranges from USD 5-10 per kg (FOB), influenced by several factors:

The affordability of ASTM A240/ASME SA240 UNS S30409 makes it a cost-effective choice for high-temperature applications, balancing performance and budget.

• Alloy Content: Higher carbon content compared to sa 240/a 240 uns s30403 slightly increases costs.
• Market Demand: High demand in petrochemical and power generation industries drives UNS S30409 price.
• Product Form: ASTM A240/ASME SA240 UNS S30409 plates may cost more than sheets due to processing complexity.
• Global Supply Chain: Freight and raw material availability impact ASTM A240/ASME SA240 UNS S30409 cost.

For a precise ASTM A240/ASME SA240 UNS S30409 price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.

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Related Stainless Steel Grades

 

As a leading uns stainless supplier, Gangsteel offers a wide range of sa 240/a 240 uns stainless grades to complement sa 240/a 240 uns s30409 for various applications:

This diverse portfolio ensures clients can find the ideal material for their specific project needs, from high-temperature to corrosion-resistant applications.

• sa 240/a 240 uns s30400: General-purpose austenitic stainless steel.
• sa 240/a 240 uns s30403: Low-carbon for enhanced weldability.
• sa 240/a 240 uns s31600: Molybdenum-alloyed for chloride resistance.
• sa 240/a 240 uns s31603: Low-carbon for enhanced weldability in chloride environments.
• sa 240/a 240 uns s31700: High corrosion resistance for chemical processing.
• sa 240/a 240 uns s31703: Low-carbon for acidic environments.
• sa 240/a 240 uns s32100: Titanium-stabilized for high-temperature applications.
• sa 240/a 240 uns s32109: High-carbon for enhanced creep resistance.
• sa 240/a 240 uns s34700: Stabilized for high-temperature corrosion resistance.
• sa 240/a 240 uns s34709: Enhanced creep resistance for high-temperature applications.
• sa 240/a 240 uns s30815: High-temperature corrosion resistance.
• sa 240/a 240 uns n08904: Superior sulfuric acid resistance for chemical applications.
• sa 240/a 240 uns s31254: High corrosion resistance for aggressive environments.
• sa 240/a 240 uns s43932: Ferritic for automotive exhaust systems.
• sa 240/a 240 uns s44400: Ferritic with high corrosion resistance for water tanks.
• sa 240/a 240 uns s2304: Lean duplex for structural applications.
• sa 240/a 240 uns s31803: Duplex for marine applications.
• sa 240/a 240 uns s32205: Duplex for enhanced corrosion resistance.
• sa 240/a 240 uns s32750: Super-duplex for aggressive environments.
• sa 240/a 240 uns s32760: Super-duplex for extreme corrosion resistance.
• sa 240/a 240 uns s32520: Duplex for high-strength applications.
• sa 240/a 240 uns s32550: Enhanced sulfuric acid resistance.

Note: These grades complement sa 240/a 240 uns s30409 in high-temperature, chemical, and petrochemical applications. Contact Gangsteel for a full catalog to find the perfect material for your project.

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FAQ

 

Q: What is the main difference between ASTM A240/ASME SA240 UNS S30409 and ASME SA240 UNS S30400?

A: ASTM A240/ASME SA240 UNS S30409 has higher carbon content for enhanced creep resistance in high-temperature applications, while sa 240/a 240 uns s30400 is standard for general corrosion resistance.

Q: Is ASTM A240/ASME SA240 UNS S30409 suitable for high-temperature applications?

A: Yes, its high carbon content ensures excellent creep resistance, making it ideal for chemical reactors and boilers compared to sa 240/a 240 uns s30403.

Q: How does the price of ASTM A240/ASME SA240 UNS S30409 compare to ASME SA240 UNS S31600?

A: ASTM A240/ASME SA240 UNS S30409 is typically 20-30% less expensive than sa 240/a 240 uns s31600 due to the absence of molybdenum, offering cost-effective performance for mild environments.

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Contact Us

 

For sa 240/a 240 uns s30409 quotes, technical data sheets, or custom solutions, contact Gangsteel at admin@gangsteel.com. Explore our sa 240/a 240 uns stainless grades portfolio for more options.

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