asme sa 240 gr 321h 321 stainless steel sheet supplier

 

WE ARE ASME SA 240 Gr 321H Stainless Steel Sheet Supplier

 

For projects demanding superior high-temperature strength and corrosion resistance, ASME SA 240 Gr 321H stainless steel sheet is a standout choice.

As a premier exporter of stainless steel products from China, Gangsteel supplies top-quality ASME SA 240 Gr 321H stainless steel sheet, along with plates, coils, bars, and custom components, all compliant with ASME SA240 Stainless sheet and ASTM A240 standards. With an inventory exceeding 600 tons and advanced processing technology, we ensure rapid delivery and tailored solutions for clients worldwide.

This comprehensive guide covers the ASME SA 240 Gr 321H chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASME SA 240 Gr 321H price per kg.

Whether you're an engineer working on high-temperature chemical reactors or a procurement specialist sourcing for aerospace applications, this article will help you understand why 321H is a reliable option. Explore our ASME SA240 Stainless sheet portfolio for related grades like sa 240 gr 321, sa 240 gr 347h, and sa 240 gr 316h.

 

Why Choose ASME SA 240 Gr 321H Stainless Steel Sheet?

 

ASME SA 240 Gr 321H, also known as UNS S32109, is a high-carbon, titanium-stabilized austenitic stainless steel designed for enhanced creep resistance and high-temperature performance up to 900°C (1652°F). With 17.0-19.0% chromium, 9.0-12.0% nickel, and titanium (4xC min), it offers excellent resistance to intergranular corrosion, making it ideal for applications involving welding and prolonged exposure to elevated temperatures, such as in power generation, chemical processing, and aerospace.

Key benefits of ASME SA 240 Gr 321H stainless sheet include:

• Enhanced High-Temperature Strength: Higher carbon content improves creep resistance compared to sa 240 gr 321, perfect for high-temperature environments.
• Excellent Weldability: Titanium stabilization minimizes carbide precipitation, ensuring corrosion resistance post-welding.
• Good Corrosion Resistance: Performs well in oxidizing environments and mild acids, offering a cost-effective alternative to sa 240 gr 316 for non-chloride applications.
• Versatility: Suitable for both structural and aesthetic applications, with a polished finish for decorative uses.

Case Study: A petrochemical plant in Saudi Arabia utilized ASME SA 240 Gr 321H stainless sheet for heat exchanger tubes, achieving a 30% increase in service life due to its superior creep resistance compared to sa 240 gr 304h.

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ASME SA 240 Gr 321H Chemical Composition

 

The ASME SA 240 Gr 321H chemical composition is tailored for high-temperature strength, corrosion resistance, and weldability, compliant with ASME SA240 Stainless sheet standards.

Element	Percentage (%)
Chromium (Cr)	17.0 – 19.0
Nickel (Ni)	9.0 – 12.0
Titanium (Ti)	4xC – 0.70
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 (~65%)

The elevated carbon content enhances creep resistance, while titanium stabilization prevents intergranular corrosion during welding. This makes ASME SA 240 Gr 321H a robust choice over sa 240 gr 304 for high-temperature applications.

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ASME SA 240 Gr 321H Mechanical Properties

 

The ASME SA 240 Gr 321H mechanical properties provide excellent strength, ductility, and high-temperature performance, ideal for demanding 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)	≤ 95	-
Density	8.0 g/cm³ (0.289 lb/in³)	-

Solution annealing at 950-1120°C (1742-2048°F) optimizes UNS S32109 mechanical properties for creep resistance and corrosion performance. At Gangsteel, we’ve seen clients leverage this alloy in boiler components, outperforming sa 240 gr 316h in sustained high-temperature conditions.

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ASME SA 240 Gr 321H Specifications and Forms

 

Gangsteel supplies ASME SA 240 Gr 321H stainless steel sheet, plate, coil, bar, and custom components to meet your project’s needs, compliant with ASME SA240 Stainless sheet and ASTM A240 standards:

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: ASME SA240 Stainless sheet, ASTM A240
• Applications: ASME SA 240 Gr 321H stainless sheet for boiler tubes, UNS S32109 plate for chemical reactors

7.2 Coil

• Thickness: 0.1 mm to 6 mm
• Width: Up to 2000 mm
• Standards: ASME SA240 Stainless sheet, ASTM A240
• 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: ASME SA 240 Gr 321H bar 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 ASME SA240 Stainless sheet requirements. Contact us at admin@gangsteel.com for bespoke ASME SA 240 Gr 321H material specifications.

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Applications of ASME SA 240 Gr 321H Stainless Steel Sheet

 

ASME SA 240 Gr 321H stainless sheetis designed for industries requiring high-temperature strength and corrosion resistance. Key ASME SA 240 Gr 321H applications include:

• Power Generation: ASME SA 240 Gr 321H stainless sheet for boiler components and superheaters.
• Petrochemical: UNS S32109 plate for reactors and heat exchangers.
• Aerospace: ASME SA 240 Gr 321H bar for high-temperature engine components.
• Chemical Processing: Equipment exposed to high temperatures and mild corrosives.
• Oil and Gas: Piping and fittings in high-heat environments.

Case Study: A refinery in India implemented ASME SA 240 Gr 321H stainless sheet for reactor linings, extending equipment life by 25% compared to sa 240 gr 316 due to its enhanced creep resistance.

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ASME SA 240 Gr 321H vs Related Grades

 

To aid in material selection, here’s a comparison of ASME SA 240 Gr 321H with sa 240 gr 321, sa 240 gr 347h, and sa 240 gr 316h:

Property	ASME SA 240 Gr 321H (S32109)	ASME SA240 Gr 321	ASME SA240 Gr 347H	ASME SA240 Gr 316H
UNS Number	S32109	S32100	S34709	S31609
Type	Austenitic	Austenitic	Austenitic	Austenitic
Chromium Content	17.0-19.0%	17.0-19.0%	17.0-19.0%	16.0-18.0%
Nickel Content	9.0-12.0%	9.0-12.0%	9.0-13.0%	10.0-14.0%
Stabilizing Element	Ti (4xC-0.70%)	Ti (5xC-0.70%)	Cb+Ta (10xC-1.0%)	-
Carbon Content	0.04-0.10%	≤ 0.08%	0.04-0.10%	0.04-0.10%
Corrosion Resistance	Good in oxidizing environments	Good in oxidizing environments	Good, intergranular	Excellent in chlorides
Strength	High at high temps	Moderate	High at high temps	High at high temps
Temp Range	Up to 900°C (1652°F)	Up to 900°C (1652°F)	Up to 850°C (1562°F)	Up to 870°C (1598°F)
Cost (USD/kg)	6-12	6-12	7-14	6-12
Applications	High-temp chemical, aerospace	Aerospace, chemical	Petrochemical, aerospace	High-temp chemical

• ASME SA 240 Gr 321H vs ASME SA240 Gr 321: ASME SA 240 Gr 321H offers enhanced creep resistance due to higher carbon, while sa 240 gr 321 is suited for standard high-temperature applications.
• ASME SA 240 Gr 321H vs ASME SA240 Gr 347H: ASME SA 240 Gr 321H uses titanium for stabilization, while sa 240 gr 347h uses columbium/tantalum, offering similar high-temperature performance.
• ASME SA 240 Gr 321H vs ASME SA240 Gr 316H: ASME SA 240 Gr 321H excels in intergranular corrosion resistance, while sa 240 gr 316h provides better chloride resistance with molybdenum.

Conclusion: Choose ASME SA 240 Gr 321H for high-temperature creep resistance, sa 240 gr 321 for standard welding applications, sa 240 gr 347h for similar stabilized performance, or sa 240 gr 316h for chloride-rich environments.

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ASME SA 240 Gr 321H Equivalent Materials

 

ASME SA 240 Gr 321Haligns with international standards for global compatibility.

Standard	Grade
UNS	S32109
W.Nr.	1.4878
EN	X8CrNiTi18-10
JIS	SUS 321H
GB	07Cr18Ni11Ti
ASTM	A240 321h
ASME	SA240 321h

Note: ASME SA 240 Gr 321H equivalent grades comply with ASME SA240 Stainless sheet, JIS, and GB standards, offering interchangeability with sa 240 gr 321 for high-temperature applications.

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ASME SA 240 Gr 321H Allowable Stress

 

The allowable stress values for ASME SA 240 Gr 321H, 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 Gr 321H performs reliably in boiler components and chemical reactors under elevated temperatures.

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ASME SA 240 Gr 321H Price

 

The ASME SA 240 Gr 321H price per kg ranges from USD 6-12 per kg (FOB), influenced by:

• Alloy Content: Higher carbon and titanium increase costs slightly compared to sa 240 gr 304.
• Market Demand: High demand in petrochemical and power generation industries drives UNS S32109 price.
• Product Form: ASME SA 240 Gr 321H plate may cost more than sheet due to processing complexity.
• Global Supply Chain: Freight and availability impact ASME SA 240 Gr 321H cost.

For a precise ASME SA 240 Gr 321H 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 sheet grades to complement ASME SA 240 Gr 321H for various applications:

• sa 240 gr 321: Standard titanium-stabilized grade for general high-temperature applications.
• sa 240 gr 347: Columbium-stabilized for high-temperature corrosion resistance.
• sa 240 gr 347h: High-carbon for enhanced creep resistance.
• sa 240 gr 316: Excellent corrosion resistance for marine applications.
• sa 240 gr 316l: Low-carbon for enhanced weldability.
• sa 240 gr 316h: High-temperature strength for chemical processing.
• sa 240 gr 316ln: Nitrogen-enhanced for strength and corrosion resistance.
• sa 240 gr 316n: High strength for structural applications.
• sa 240 gr 316ti: Titanium-stabilized for high-temperature weldability.
• sa 240 gr 317: High corrosion resistance for chemical processing.
• sa 240 gr 317l: Low-carbon for acidic environments.
• sa 240 gr 317lm: Cost-effective corrosion resistance for acidic environments.
• sa 240 gr 317lmn: Nitrogen-enhanced for improved strength and corrosion resistance.
• sa 240 gr 904l: Superior sulfuric acid resistance for chemical applications.
• sa 240 gr 201: Cost-effective for decorative applications.
• sa 240 gr 201l: Cost-effective for structural applications.
• sa 240 gr 201ln: Nitrogen-enhanced for structural and cryogenic applications.
• sa 240 gr 202: General corrosion resistance for decorative uses.
• sa 240 gr 301: High strength for springs and fasteners.
• sa 240 gr 301l: Low-carbon for improved weldability.
• sa 240 gr 301ln: Nitrogen-enhanced for strength and weldability.
• sa 240 gr 302: General-purpose austenitic stainless steel.
• sa 240 gr 305: High nickel for deep drawing applications.
• sa 240 gr 309cb: High-temperature corrosion resistance.
• sa 240 gr 309h: High-temperature strength for furnaces.
• sa 240 gr 309hcb: Enhanced high-temperature performance.
• sa 240 gr 309s: Corrosion resistance for high-temperature applications.
• sa 240 gr 310cb: High-temperature strength with columbium.
• sa 240 gr 310h: High-temperature resistance for furnaces.
• sa 240 gr 310hcb: Enhanced high-temperature performance.
• sa 240 gr 310moln: Nitrogen-enhanced for urea production.
• sa 240 gr 310s: High-temperature corrosion resistance.
• sa 240 gr 316cb: Columbium-stabilized for weldability.
• sa 240 gr 415: High strength for oilfield and turbine applications.
• sa 240 type 2205: Duplex for marine applications.
• sa 240 type 2304: Lean duplex for structural applications.
• sa 240 type 2507: Super-duplex for aggressive environments.
• sa 240 type 329: Duplex for chemical and marine applications.
• sa 240 type 255: Enhanced sulfuric acid resistance.
• sa 240 gr 800: High-temperature corrosion resistance.
• sa 240 gr 800H: Enhanced creep resistance for high temperatures.
• sa 240 gr 904l: Superior sulfuric acid resistance.
• sa 240 gr 334: High-temperature resistance for heating elements.
• sa 240 gr 348: Low-cobalt for nuclear applications.
• sa 240 gr 348h: High-carbon for enhanced high-temperature strength.
• sa 240 gr 201l: Cost-effective for decorative applications.
• sa 240 gr 405: Ferritic for heat-resistant applications.
• sa 240 gr 409: Cost-effective for automotive exhaust systems.
• sa 240 gr 410: Martensitic for high-strength applications.
• sa 240 gr 410s: Low-carbon martensitic for improved weldability.
• sa 240 gr 429: Ferritic for corrosion and heat resistance.
• sa 240 gr 430: Ferritic for decorative and appliance applications.
• sa 240 gr 434: Ferritic with molybdenum for enhanced corrosion resistance.
• sa 240 gr 436: Ferritic for automotive and corrosion-resistant applications.
• sa 240 gr 439: Ferritic for exhaust systems and appliances.
• sa 240 gr 444: Ferritic with high corrosion resistance for water tanks.

Note: These grades complement ASME SA 240 Gr 321H 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 ASME SA 240 Gr 321H and ASME SA240 Gr 321?

A: ASME SA 240 Gr 321H has higher carbon for enhanced creep resistance in high-temperature applications, while sa 240 gr 321 offers standard weldability for general high-temperature uses.

Q: Is ASME SA 240 Gr 321H suitable for welding?

A: Yes, its titanium stabilization ensures good weldability with minimal sensitization, similar to sa 240 gr 316ti.

Q: How does the price of ASME SA 240 Gr 321H compare to ASME SA240 Gr 347H?

A: ASME SA 240 Gr 321H is typically similar in cost to sa 240 gr 347h, with slight variations due to differences in stabilizing elements (titanium vs. columbium/tantalum).

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Contact Us

For ASME SA 240 Gr 321H stainless steel sheet quotes, technical data sheets, or custom solutions, contact Gangsteel at admin@gangsteel.com. Explore our ASME SA240 Stainless sheet portfolio for more options.

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