ASTM A240 / ASME SA240 UNS N08811 Stainless Steel Plate

 

ASTM A240/ASME SA240 UNS N08811 Stainless Steel Plate for sales
 

For applications requiring superior high-temperature strength, exceptional creep resistance, and outstanding oxidation resistance, ASTM A240/ASME SA240 UNS N08811 Stainless Steel Plate is an excellent choice. As a premier uns stainless supplier, Gangsteel is dedicated to providing high-quality sa 240/a 240 uns n08811 plates, sheets, coils, bars, and custom components, all compliant with sa 240/a 240 uns stainless grades standards, including ASTM A240 and ASME SA240. With a robust inventory exceeding 600 tons and cutting-edge processing technology, Gangsteel ensures prompt delivery and tailored solutions for clients worldwide.

This comprehensive guide explores the ASTM A240/ASME SA240 UNS N08811 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASTM A240/ASME SA240 UNS N08811 price per kg. Whether you're an engineer designing high-temperature furnaces or a procurement specialist sourcing for petrochemical applications, this article will clarify why Incoloy 800HT (UNS N08811) 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 n08020, sa 240/a 240 uns n08367, sa 240/a 240 uns n08800, sa 240/a 240 uns n08810, sa 240/a 240 uns n08926, and sa 240/a 240 uns s31277.

Why Choose ASTM A240/ASME SA240 UNS N08811 Stainless Steel Plate?

 

ASTM A240/ASME SA240 UNS N08811, commonly known as Incoloy 800HT, is an austenitic nickel-iron-chromium alloy with 19.0-23.0% chromium, 30.0-35.0% nickel, and tightly controlled carbon (0.06-0.10%), aluminum (0.25-0.60%), and titanium (0.25-0.60%) content. It is engineered for exceptional high-temperature strength, creep resistance, and oxidation resistance, making it ideal for extreme high-temperature environments in petrochemical, power generation, and heat treatment industries. The precise control of carbon, aluminum, and titanium enhances its creep and stress rupture properties, offering superior performance over sa 240/a 240 uns n08810.

The ASTM A240/ASME SA240 UNS N08811 stainless steel plate provides outstanding resistance to oxidation, carburization, and nitriding, surpassing sa 240/a 240 uns s31000 in extreme high-temperature applications. Its ability to maintain structural integrity at temperatures up to 1150°C (2102°F) makes it a preferred choice for demanding conditions.

Key benefits of ASTM A240/ASME SA240 UNS N08811 stainless steel plate include:

• Superior High-Temperature Strength: Enhanced creep and stress rupture properties due to controlled alloying, outperforming sa 240/a 240 uns n08800.
• Exceptional Oxidation Resistance: High nickel and chromium content ensure excellent performance in oxidative environments, surpassing sa 240/a 240 uns s31600.
• Carburization and Nitriding Resistance: Ideal for furnace components, offering better durability than sa 240/a 240 uns s30400.
• Versatility: Suitable for extreme high-temperature applications, comparable to sa 240/a 240 uns s30815.

Case Study: A petrochemical plant in India used sa 240/a 240 uns n08811 plates for furnace retorts, achieving a 50% longer service life due to its superior creep resistance compared to sa 240/a 240 uns s34700.

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ASTM A240/ASME SA240 UNS N08811 Chemical Composition

 

The ASTM A240/ASME SA240 UNS N08811 chemical composition is optimized for extreme high-temperature strength, creep resistance, and oxidation resistance, compliant with sa 240/a 240 uns stainless grades standards.

The high nickel (30.0-35.0%) and chromium (19.0-23.0%) content, combined with tightly controlled carbon (0.06-0.10%), aluminum (0.25-0.60%), and titanium (0.25-0.60%), provide superior creep resistance and stability at elevated temperatures. This makes ASTM A240/ASME SA240 UNS N08811 more suitable for extreme high-temperature applications than sa 240/a 240 uns s31009.

Element	Percentage (%)
Chromium (Cr)	19.0 – 23.0
Nickel (Ni)	30.0 – 35.0
Iron (Fe)	≥ 39.5
Carbon (C)	0.06 – 0.10
Manganese (Mn)	≤ 1.5
Silicon (Si)	≤ 1.0
Phosphorus (P)	≤ 0.045
Sulfur (S)	≤ 0.015
Aluminum (Al)	0.25 – 0.60
Titanium (Ti)	0.25 – 0.60
Copper (Cu)	≤ 0.75

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ASTM A240/ASME SA240 UNS N08811 Mechanical Properties

 

The ASTM A240/ASME SA240 UNS N08811 mechanical properties offer a balance of high-temperature strength, ductility, and corrosion resistance, suitable for extreme high-temperature applications.

These properties ensure that ASTM A240/ASME SA240 UNS N08811 stainless steel plate can withstand mechanical stresses at elevated temperatures. Solution annealing at 1120-1175°C (2050-2147°F) optimizes UNS N08811 mechanical properties for creep resistance and high-temperature performance.

Property	Value at 20°C
Tensile Strength (MPa)	≥ 450 (65 ksi)
Yield Strength (MPa)	≥ 170 (25 ksi)
Elongation (%)	≥ 30
Hardness (HBW)	≤ 192
Density	8.0 g/cm³ (0.289 lb/in³)

At Gangsteel, we’ve seen clients use sa 240/a 240 uns n08811 plates in superheater tubes, where its creep resistance and oxidation resistance outperform sa 240/a 240 uns s32109.

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ASTM A240/ASME SA240 UNS N08811 Specifications and Forms

 

As a leading uns stainless supplier, Gangsteel supplies sa 240/a 240 uns n08811 plates, sheets, coils, bars, and custom components, compliant with sa 240/a 240 uns stainless grades standards:

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

Plate and Sheet

• Thickness: 0.1 mm to 6 mm (sheet), 0.5 mm to 100 mm (plate)
• Width: Up to 3000 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 n08811 plates for furnace retorts, UNS N08811 sheets for heat exchangers

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

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 N08811 bars for structural components

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 N08811 material specifications.

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Applications of ASTM A240/ASME SA240 UNS N08811 Stainless Steel Plate

 

ASTM A240/ASME SA240 UNS N08811 stainless steel plateis tailored for industries requiring exceptional high-temperature strength and resistance to oxidation and carburization in extreme conditions. Its austenitic structure ensures durability and performance in demanding high-temperature applications.

Key ASTM A240/ASME SA240 UNS N08811 applications include:

• Petrochemical: sa 240/a 240 uns n08811 plates for furnace components and heat exchangers.
• Power Generation: UNS N08811 sheets for superheater tubes and boiler components.
• Chemical Processing: ASTM A240/ASME SA240 UNS N08811 bars for equipment in oxidizing and reducing environments.
• Heat Treatment: Furnace muffles and retorts requiring extreme creep resistance.
• Industrial Furnaces: Components exposed to carburizing and nitriding atmospheres.

Case Study: A power generation facility in India used sa 240/a 240 uns n08811 plates for superheater tubes, reducing maintenance by 50% compared to sa 240/a 240 uns s34709 due to its enhanced creep resistance.

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ASTM A240/ASME SA240 UNS N08811 vs Related Grades

 

To aid in material selection, here’s a comparison of sa 240/a 240 uns n08811 with sa 240/a 240 uns n08020, sa 240/a 240 uns n08367, sa 240/a 240 uns n08800, sa 240/a 240 uns n08810, sa 240/a 240 uns n08926, and sa 240/a 240 uns s31277:

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 N08811	ASME SA240 UNS N08020	ASME SA240 UNS N08367	ASME SA240 UNS N08800	ASME SA240 UNS N08810	ASME SA240 UNS N08926	ASME SA240 UNS S31277
UNS Number	N08811	N08020	N08367	N08800	N08810	N08926	S31277
Type	Austenitic	Austenitic	Austenitic	Austenitic	Austenitic	Austenitic	Austenitic
Chromium Content	19.0-23.0%	19.0-21.0%	20.0-22.0%	19.0-23.0%	19.0-23.0%	19.0-21.0%	20.5-23.0%
Nickel Content	30.0-35.0%	32.0-38.0%	23.5-25.5%	30.0-35.0%	30.0-35.0%	24.0-26.0%	26.0-28.0%
Molybdenum Content	-	2.0-3.0%	6.0-7.0%	-	-	6.0-7.0%	6.5-8.0%
Nitrogen Content	-	-	0.18-0.25%	-	-	0.15-0.25%	0.30-0.40%
Copper Content	≤ 0.75%	3.0-4.0%	≤ 0.75%	≤ 0.75%	≤ 0.75%	0.5-1.5%	0.5-1.5%
Carbon Content	0.06-0.10%	≤ 0.07%	≤ 0.03%	≤ 0.10%	0.05-0.10%	≤ 0.02%	≤ 0.02%
Corrosion Resistance	Excellent in high-temp environments	Excellent in sulfuric acid	Superior in chlorides	Good in high-temp	Good in high-temp	Superior in chlorides	Superior in chlorides
Strength	Moderate	Moderate	Moderate	Moderate	Moderate	High	High
Temp Range	Up to 1150°C (2102°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)	Up to 1100°C (2012°F)	Up to 1100°C (2012°F)	Up to 870°C (1598°F)	Up to 870°C (1598°F)
Cost (USD/kg)	8-12	8-12	10-15	7-10	7-10	10-15	12-18
Applications	High-temp furnaces, petrochemical	Chemical, pharmaceutical	Marine, chemical	High-temp furnaces	High-temp furnaces	Marine, chemical	Marine, chemical

• ASTM A240/ASME SA240 UNS N08811 vs ASME SA240 UNS N08020: N08811 excels in extreme high-temperature environments, while sa 240/a 240 uns n08020 is optimized for sulfuric acid resistance.
• ASTM A240/ASME SA240 UNS N08811 vs ASME SA240 UNS N08367: N08811 is suited for high-temperature applications, while sa 240/a 240 uns n08367 offers superior chloride resistance for marine environments.
• ASTM A240/ASME SA240 UNS N08811 vs ASME SA240 UNS N08800: N08811 provides enhanced creep resistance for extreme high-temperature applications, while sa 240/a 240 uns n08800 is versatile for general high-temperature use.
• ASTM A240/ASME SA240 UNS N08811 vs ASME SA240 UNS N08810: N08811 offers superior creep resistance due to tighter control of aluminum and titanium, while sa 240/a 240 uns n08810 is suitable for moderate high-temperature applications.
• ASTM A240/ASME SA240 UNS N08811 vs ASME SA240 UNS N08926: N08811 is designed for high-temperature performance, while sa 240/a 240 uns n08926 offers superior chloride resistance.
• ASTM A240/ASME SA240 UNS N08811 vs ASME SA240 UNS S31277: N08811 is optimized for extreme high-temperature furnaces, while sa 240/a 240 uns s31277 provides higher strength and chloride resistance.

Conclusion: Choose sa 240/a 240 uns n08811 for extreme high-temperature applications with superior creep resistance, sa 240/a 240 uns n08020 for sulfuric acid environments, sa 240/a 240 uns n08367 or sa 240/a 240 uns n08926 for chloride-rich environments, sa 240/a 240 uns n08800 for general high-temperature applications, sa 240/a 240 uns n08810 for moderate high-temperature performance, or sa 240/a 240 uns s31277 for high-strength, chloride-resistant applications.

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ASTM A240/ASME SA240 UNS N08811 Equivalent Materials

 

ASTM A240/ASME SA240 UNS N08811aligns 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 N08811 a versatile choice for extreme high-temperature applications.

Standard	Grade
UNS	N08811
W.Nr.	1.4959
EN	X8NiCrAlTi32-21
JIS	NCF 800HT
GB	NS1103
ASTM	A240
ASME	SA240

Note: ASTM A240/ASME SA240 UNS N08811 equivalent grades comply with sa 240/a 240 uns stainless grades, JIS, and GB standards, offering interchangeability with sa 240/a 240 uns n08810 for similar high-temperature applications.

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ASTM A240/ASME SA240 UNS N08811 Allowable Stress

The allowable stress values for ASTM A240/ASME SA240 UNS N08811, per ASME BPVC Section II, Part D, ensure reliable performance in extreme high-temperature environments.

These values reflect the material’s ability to withstand mechanical stresses while maintaining oxidation and creep resistance at elevated temperatures.

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 n08811 performs reliably in furnace components and superheater tubes.

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ASTM A240/ASME SA240 UNS N08811 Price

 

The ASTM A240/ASME SA240 UNS N08811 price per kg ranges from USD 8-12 per kg (FOB), influenced by several factors:

The superior creep resistance and high-temperature strength of ASTM A240/ASME SA240 UNS N08811 make it a premium choice for extreme high-temperature applications.

• Alloy Content: High nickel (30.0-35.0%) and chromium (19.0-23.0%) with controlled aluminum and titanium increase costs compared to sa 240/a 240 uns s30403.
• Market Demand: High demand in petrochemical and power generation industries drives UNS N08811 price.
• Product Form: ASTM A240/ASME SA240 UNS N08811 plates may cost more than sheets due to processing complexity.
• Global Supply Chain: Freight and raw material availability impact ASTM A240/ASME SA240 UNS N08811 cost.

For a precise ASTM A240/ASME SA240 UNS N08811 price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.

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Related Stainless Steel Grades

 

As a trusted uns stainless supplier, Gangsteel offers a wide range of sa 240/a 240 uns stainless grades to complement sa 240/a 240 uns n08811 for various applications:

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

• sa 240/a 240 uns s20100: Cost-effective austenitic stainless steel for general-purpose applications.
• sa 240/a 240 uns s20200: Austenitic stainless steel with enhanced corrosion resistance for mild environments.
• 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 s30409: High-carbon for high-temperature strength.
• sa 240/a 240 uns s30908: Low-carbon for moderate high-temperature applications.
• sa 240/a 240 uns s31000: High-carbon for extreme high-temperature strength.
• sa 240/a 240 uns s31008: Low-carbon for enhanced weldability in high-temperature applications.
• sa 240/a 240 uns s31009: High-carbon for enhanced creep resistance.
• 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 s32304: Lean duplex for structural applications.
• sa 240/a 240 uns s31803: Duplex for marine and chemical 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: Super-duplex for high-strength applications.
• sa 240/a 240 uns s32550: Super-duplex for enhanced sulfuric acid resistance.
• sa 240/a 240 uns s41000: Martensitic for high-strength, wear-resistant applications.
• sa 240/a 240 uns s43000: Ferritic for automotive and appliance applications.
• sa 240/a 240 uns s20200: Austenitic stainless steel for mild environments.
• sa 240/a 240 uns n08020: Austenitic stainless steel for sulfuric acid resistance.
• sa 240/a 240 uns n08367: Austenitic stainless steel for superior chloride resistance.
• sa 240/a 240 uns n08926: Austenitic stainless steel for superior chloride resistance.
• sa 240/a 240 uns s31277: Austenitic stainless steel for high-strength, chloride-resistant applications.

Note: These grades complement sa 240/a 240 uns n08811 in high-temperature, petrochemical, 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 main difference between ASTM A240/ASME SA240 UNS N08811 and ASME SA240 UNS N08810?

A: ASTM A240/ASME SA240 UNS N08811 offers superior creep resistance due to tighter control of aluminum and titanium, while sa 240/a 240 uns n08810 is suitable for moderate high-temperature applications.

Q: Is ASTM A240/ASME SA240 UNS N08811 suitable for petrochemical applications?

A: Yes, its high nickel, chromium, and controlled alloying ensure excellent creep and oxidation resistance, making it ideal for furnace components compared to sa 240/a 240 uns s31700.

Q: How does the price of ASTM A240/ASME SA240 UNS N08811 compare to ASME SA240 UNS N08367?

A: ASTM A240/ASME SA240 UNS N08811 is typically 20-30% less expensive than sa 240/a 240 uns n08367 due to its lower alloy content, offering cost-effective performance for high-temperature applications.

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Contact Us

 

For sa 240/a 240 uns n08811 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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