What is ASME SA240 Type 304N Stainless sheet?

 

ASME SA240 Type 304N Stainless Steel Plate Supplier

 

When your project requires a high-strength, corrosion-resistant material with excellent weldability for demanding structural and high-temperature applications, ASME SA240 Type 304N stainless steel plate is an ideal choice.

Supplied by Gangsteel, a leading exporter of stainless steel plates and coils in China, this nitrogen-enhanced austenitic stainless steel is renowned for its superior ASME SA240 Type 304N corrosion resistance and mechanical properties, making it suitable for chemical processing, power generation, and industrial equipment.

Gangsteel offers ASME SA240 Type 304N 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.

Gangsteel provides detailed insights into the ASME SA240 Type 304N chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASME SA240 Type 304N 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 304LN.

 

Why Choose ASME SA240 Type 304N Stainless Steel Plate?

 

ASME SA240 Type 304N, also known as UNS S30451, is a nitrogen-alloyed version of the classic 304 stainless steel, offering enhanced strength and corrosion resistance without sacrificing formability or weldability. With 18.0-20.0% chromium and 8.0-10.5% nickel, plus 0.10-0.16% nitrogen, it achieves a higher yield strength (≥ 240 MPa) than standard 304, making it perfect for structural applications where weight reduction and durability are key.

Key benefits of ASME SA240 Type 304N plate include:

• Superior Strength: Nitrogen addition boosts tensile and yield strength by 20-50% over ASME SA240 Gr 304, ideal for high-stress environments.
• Excellent Corrosion Resistance: Resists oxidation, pitting, and intergranular corrosion in moderate to high-temperature settings, outperforming ASME SA240 Gr 304L in chloride-exposed conditions.
• Cost-Effective High-Performance: A budget-friendly alternative to more expensive alloys like ASME SA240 Gr 316, with similar corrosion resistance but higher strength.
• Weldability and Formability: Low carbon content minimizes carbide precipitation, ensuring excellent weldability for fabrication.

Case Study: A power plant in India used ASME SA240 Type 304N plate for boiler components, reducing material thickness by 15% due to its high strength, resulting in cost savings and improved efficiency.

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ASME SA240 Type 304N Chemical Composition

 

The ASME SA240 Type 304N chemical composition is optimized for enhanced strength, corrosion resistance, and weldability, compliant with ASME SA240 standards.

Element	Percentage (%)
Chromium (Cr)	18.0 – 20.0
Nickel (Ni)	8.0 – 10.5
Nitrogen (N)	0.10 – 0.16
Carbon (C)	≤ 0.08
Manganese (Mn)	≤ 2.0
Silicon (Si)	≤ 1.0
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.03
Iron (Fe)	Balance (~60%)

Note: The nitrogen addition significantly increases strength without compromising ductility, while low carbon ensures resistance to sensitization during welding. This makes ASME SA240 Type 304N a superior upgrade from ASME SA240 Gr 304 for structural uses.

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ASME SA240 Type 304N Mechanical Properties

 

The ASME SA240 Type 304N mechanical properties offer a perfect balance of high strength, ductility, and toughness, making it suitable for structural and 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)	≥ 240 (35 ksi)	≥ 170 (25 ksi)
Elongation (%)	≥ 40	≥ 45
Hardness (HRB)	≤ 92	-
Density	8.00 g/cm³ (0.289 lb/in³)	-

Note: Solution annealing at 1050-1150°C (1922-2102°F) optimizes UNS S30451 mechanical properties for corrosion resistance and strength. Contact Gangsteel at admin@gangsteel.com for a detailed ASME SA240 Type 304N technical data sheet.

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ASME SA240 Type 304N Specifications and Forms

 

Gangsteel provides ASME SA240 Type 304N 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 SA240 Type 304N plate for structural components, UNS S30451 sheet for high-temperature 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 SA240 Type 304N bar for high-strength 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 chemical 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 SA240 Type 304N material specifications.

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Applications of ASME SA240 Type 304N Stainless Steel Plate

 

ASME SA240 Type 304N stainless steel plateis designed for industries requiring high strength and corrosion resistance in moderate to high-temperature environments. Key ASME SA240 Type 304N applications include:

• Chemical Processing: ASME SA240 Type 304N plate for reactors and heat exchangers exposed to corrosive chemicals.
• Power Generation: UNS S30451 sheet for boiler components and superheaters.
• Structural Components: ASME SA240 Type 304N bar for high-strength frames and supports in industrial settings.
• Oil and Gas: Piping and fittings requiring corrosion resistance and strength.
• Food and Pharmaceutical: Equipment where hygiene and corrosion resistance are essential.

Case Study: A petrochemical plant in the UAE utilized ASME SA240 Type 304N plate for heat exchanger tubes, achieving a 25% increase in service life due to its enhanced strength and resistance to stress corrosion cracking.

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ASME SA240 Type 304N vs Related Grades

 

Choosing the right grade is essential for optimal performance. Here’s how ASME SA240 Type 304N compares to ASME SA240 Gr 304, ASME SA240 Gr 304LN, and ASME SA240 Gr 316:

Property	ASME SA240 Type 304N (S30451)	ASME SA240 Gr 304 (S30400)	ASME SA240 Gr 304LN (S30453)	ASME SA240 Gr 316 (S31600)
UNS Number	S30451	S30400	S30453	S31600
Type	Austenitic	Austenitic	Austenitic	Austenitic
Nickel Content	8.0-10.5%	8.0-10.5%	8.0-12.0%	10.0-14.0%
Chromium Content	18.0-20.0%	18.0-20.0%	18.0-20.0%	16.0-18.0%
Nitrogen Content	0.10-0.16%	-	0.10-0.16%	-
Molybdenum Content	-	-	-	2.0-3.0%
Corrosion Resistance	Good in mild environments	Good in mild environments	Good in mild environments	Excellent in chlorides
Strength	High	Moderate	High	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	Structural, high-temperature	General, food industry	Structural, cryogenic	Marine, chemical

• ASME SA240 Type 304N vs ASME SA240 Gr 304: ASME SA240 Type 304N offers higher strength due to nitrogen, making it suitable for structural applications, while ASME SA240 Gr 304 is preferred for general-purpose uses with similar corrosion resistance.
• ASME SA240 Type 304N vs ASME SA240 Gr 304LN: Both are nitrogen-enhanced, but ASME SA240 Type 304N has a more controlled nitrogen range for consistent strength, while ASME SA240 Gr 304LN is optimized for low-temperature toughness in cryogenic applications.
• ASME SA240 Type 304N vs ASME SA240 Gr 316: ASME SA240 Type 304N provides higher strength at a lower cost, while ASME SA240 Gr 316 offers better corrosion resistance in chloride environments due to molybdenum.

Conclusion: Choose ASME SA240 Type 304N for high-strength structural applications, ASME SA240 Gr 304 for general corrosion resistance, ASME SA240 Gr 304LN for cryogenic uses, or ASME SA240 Gr 316 for enhanced chloride resistance.

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ASME SA240 Type 304N Equivalent Materials

 

ASME SA240 Type 304Naligns with international standards for global compatibility.

Standard	Grade
UNS	S30451
W.Nr.	1.4315
EN	X5CrNiN18-10
JIS	SUS 304N1
GB	0Cr19Ni9N
ASTM	A240
ASME	SA240

Note: ASME SA240 Type 304N equivalent grades comply with ASME SA240, JIS, and GB standards, offering interchangeability with ASME SA240 Gr 304N for high-strength austenitic applications.

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ASME SA240 Type 304N Allowable Stress

 

The allowable stress values for ASME SA240 Type 304N, per ASME BPVC Section II, Part D, ensure reliable performance in high-temperature and structural applications.

Temperature (°C)	Allowable Stress (MPa)
100	160
200	150
300	140
400	130
500	120
600	110

Note: These values ensure ASME SA240 Type 304N performs reliably in chemical processing equipment and power generation components under elevated temperatures.

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ASME SA240 Type 304N vs ASME SA240 Gr 304H, ASME SA240 Gr 347, and ASME SA240 Gr 317

 

To help you select the best grade, here’s a comparison of ASME SA240 Type 304N with ASME SA240 Gr 304H, ASME SA240 Gr 347, and ASME SA240 Gr 317:

Property	ASME SA240 Type 304N (S30451)	ASME SA240 Gr 304H (S30409)	ASME SA240 Gr 347 (S34700)	ASME SA240 Gr 317 (S31700)
UNS Number	S30451	S30409	S34700	S31700
Type	Austenitic	Austenitic	Austenitic	Austenitic
Nickel Content	8.0-10.5%	8.0-10.5%	9.0-13.0%	11.0-15.0%
Chromium Content	18.0-20.0%	18.0-20.0%	17.0-19.0%	18.0-20.0%
Nitrogen Content	0.10-0.16%	-	-	-
Molybdenum Content	-	-	-	3.0-4.0%
Carbon Content	≤ 0.08%	0.04-0.10%	≤ 0.08%	≤ 0.08%
Corrosion Resistance	Good in mild environments	Good in mild environments	Good, intergranular	Excellent in acids
Strength	High	Moderate	Moderate	Moderate
Temp Range	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 850°C (1562°F)	Up to 870°C (1598°F)
Cost (USD/kg)	5-10	5-10	7-14	8-15
Applications	Structural, high-temperature	Heat exchangers	Aerospace, chemical	Chemical, pulp/paper

• ASME SA240 Type 304N vs ASME SA240 Gr 304H: ASME SA240 Type 304N excels in structural applications with higher strength from nitrogen, while ASME SA240 Gr 304H offers better creep resistance due to higher carbon for high-temperature heat exchangers.
• ASME SA240 Type 304N vs ASME SA240 Gr 347: ASME SA240 Type 304N provides cost-effective strength for general uses, while ASME SA240 Gr 347 is stabilized with columbium for intergranular corrosion resistance in aerospace applications.
• ASME SA240 Type 304N vs ASME SA240 Gr 317: ASME SA240 Type 304N is stronger for structural needs, while ASME SA240 Gr 317 offers superior corrosion resistance in acidic environments due to molybdenum.

Conclusion: Choose ASME SA240 Type 304N for high-strength structural applications, ASME SA240 Gr 304H for creep-resistant heat exchangers, ASME SA240 Gr 347 for high-temperature aerospace components, or ASME SA240 Gr 317 for chemical processing in acidic conditions.

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ASME SA240 Type 304N Price

 

The ASME SA240 Type 304N price per kg ranges from USD 5-10 per kg (FOB), influenced by:

• Alloy Content: Nitrogen addition (0.10-0.16%) increases strength without significantly raising costs compared to ASME SA240 Gr 316.
• Market Demand: High demand in chemical and power generation industries drives UNS S30451 price.
• Product Form: ASME SA240 Type 304N plate may cost more than sheet due to processing complexity.
• Global Supply Chain: Freight and availability impact ASME SA240 Type 304N cost.

For a precise ASME SA240 Type 304N 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 SA240 Type 304N for various applications:

• ASME SA240 Gr 304: Versatile for general industries with good corrosion resistance.
• ASME SA240 Gr 304H: High-temperature strength for heat exchangers.
• ASME SA240 Gr 304L: Low-carbon for improved weldability in corrosive environments.
• ASME SA240 Gr 304LN: Nitrogen-enhanced for strength in cryogenic applications.
• ASME SA240 Gr 316: Excellent corrosion resistance for marine applications.
• ASME SA240 Gr 316H: High-temperature strength for chemical processing.
• ASME SA240 Gr 316L: Low-carbon for enhanced weldability.
• ASME SA240 Gr 317: High corrosion resistance for chemical processing.
• ASME SA240 Gr 317L: Low-carbon for acidic environments.
• 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 334: High-temperature resistance for heating elements.
• ASME SA240 Gr 347: Stabilized for high-temperature corrosion resistance.
• ASME SA240 Gr 347H: Enhanced creep resistance for high-temperature applications.
• ASME SA240 Gr 348: Low-cobalt for nuclear applications.
• ASME SA240 Gr 348H: High-carbon for enhanced high-temperature strength.
• ASME SA240 Gr 904L: Superior sulfuric acid resistance for chemical applications.
• ASME SA240 Gr 201L: Cost-effective for decorative and structural applications.
• ASME SA240 Gr 201LN: Nitrogen-enhanced for structural and cryogenic applications.

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 makes ASME SA240 Type 304N better than ASME SA240 Gr 304 for structural applications?

A: The nitrogen addition in ASME SA240 Type 304N increases yield strength by up to 50%, allowing for thinner materials and cost savings in structural designs, while maintaining similar corrosion resistance.

Q: Is ASME SA240 Type 304N suitable for welding?

A: Yes, its low carbon content (≤ 0.08%) minimizes carbide precipitation, ensuring excellent weldability without post-weld annealing in most cases.

Q: How does ASME SA240 Type 304N compare in price to ASME SA240 Gr 316?

A: ASME SA240 Type 304N is typically 20-30% less expensive than ASME SA240 Gr 316 due to lower molybdenum content, while offering higher strength for similar corrosion resistance in non-chloride environments.

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Contact Us

For ASME SA240 Type 304N 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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