ASTM A240/ASME SA240 UNS S34709 Stainless Steel 347h sheet

 

ASTM A240/ASME SA240 UNS S34709 Stainless Steel 347H Sheet supplier

 

For applications demanding superior high-temperature strength, corrosion resistance, and weldability, ASTM A240/ASME SA240 UNS S34709 Stainless Steel 347H Sheet is an exceptional choice. As a leading uns stainless supplier, Gangsteel offers premium sa 240/a 240 uns s34709 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.

This comprehensive guide explores the ASTM A240/ASME SA240 UNS S34709 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASTM A240/ASME SA240 UNS S34709 price per kg. Whether you're an engineer designing high-temperature aerospace components or a procurement specialist sourcing for chemical processing equipment, this article will clarify why 347H 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 s34700, sa 240/a 240 uns s32100, and sa 240/a 240 uns s30409.

Why Choose ASTM A240/ASME SA240 UNS S34709 Stainless Steel 347H Sheet?

 

ASTM A240/ASME SA240 UNS S34709, commonly known as 347H stainless steel, is a high-carbon, columbium (niobium)-stabilized austenitic stainless steel with 17.0-19.0% chromium and 9.0-13.0% nickel. The "H" stands for high carbon, which enhances creep resistance and strength at elevated temperatures up to 900°C (1652°F). The columbium addition prevents carbide precipitation during welding, ensuring excellent intergranular corrosion resistance, making it ideal for high-temperature applications in aerospace, chemical processing, and power generation industries.

The high carbon content provides ASTM A240/ASME SA240 UNS S34709 stainless steel 347H sheet with superior strength compared to sa 240/a 240 uns s34700, while maintaining excellent weldability and corrosion resistance in high-temperature environments. Its robust properties make it a preferred choice for critical applications.

Key benefits of ASTM A240/ASME SA240 UNS S34709 stainless steel 347H sheet include:

• Enhanced High-Temperature Strength: Higher carbon content (0.04-0.10%) improves creep resistance, outperforming sa 240/a 240 uns s34700 in high-temperature environments.
• Superior Weldability: Columbium stabilization prevents intergranular corrosion during welding, making it ideal for high-temperature welded applications compared to sa 240/a 240 uns s30409.
• Good Corrosion Resistance: Resists corrosion in mild chemical environments, suitable for industrial applications.
• Durability: Maintains structural integrity in cyclic high-temperature conditions, unlike sa 240/a 240 uns s20100.

Case Study: A power generation facility in India used sa 240/a 240 uns s34709 sheets for superheater tubes, achieving a 30% longer service life due to its creep resistance compared to sa 240/a 240 uns s34700.

Keywords: ASTM A240/ASME SA240 UNS S34709 stainless steel 347H sheet, UNS S34709 sheet, high-carbon columbium-stabilized stainless steel, high-temperature stainless steel sheet

ASTM A240/ASME SA240 UNS S34709 Chemical Composition

 

The ASTM A240/ASME SA240 UNS S34709 chemical composition is optimized for high-temperature strength, corrosion resistance, and weldability, compliant with sa 240/a 240 uns stainless grades standards.

The columbium content (10xC min, 1.0% max) stabilizes the alloy against chromium carbide formation, ensuring excellent intergranular corrosion resistance in high-temperature welded applications. The high carbon content (0.04-0.10%) enhances creep resistance, making ASTM A240/ASME SA240 UNS S34709 superior to sa 240/a 240 uns s34700 for high-temperature strength.

Element	Percentage (%)
Chromium (Cr)	17.0 – 19.0
Nickel (Ni)	9.0 – 13.0
Columbium (Cb)	10xC min – 1.0
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%)

Keywords: ASTM A240/ASME SA240 UNS S34709 chemical composition, UNS S34709 composition, high-carbon columbium-stabilized stainless steel chemistry, ASME SA240 Gr 347H composition

ASTM A240/ASME SA240 UNS S34709 Mechanical Properties

 

The ASTM A240/ASME SA240 UNS S34709 mechanical properties offer excellent strength, ductility, and high-temperature performance, ideal for demanding applications.

These properties ensure that ASTM A240/ASME SA240 UNS S34709 stainless steel 347H sheet can withstand mechanical stresses in high-temperature environments while maintaining corrosion resistance. Solution annealing at 950-1120°C (1742-2048°F) optimizes UNS S34709 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)	≤ 95	-
Density	8.0 g/cm³ (0.289 lb/in³)	-

At Gangsteel, we’ve seen clients use sa 240/a 240 uns s34709 sheets in chemical reactors, where its high-temperature strength surpasses sa 240/a 240 uns s34700.

Keywords: ASTM A240/ASME SA240 UNS S34709 mechanical properties, UNS S34709 strength, high-carbon columbium-stabilized stainless steel properties, ASME SA240 Gr 347H mechanical properties

ASTM A240/ASME SA240 UNS S34709 Specifications and Forms

 

As a trusted uns stainless supplier, Gangsteel supplies sa 240/a 240 uns s34709 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.

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 s34709 sheets for chemical reactors, UNS S34709 plates for superheater components

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 S34709 bars for high-temperature fittings

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 aerospace and chemical 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 S34709 material specifications.

Keywords: ASTM A240/ASME SA240 UNS S34709 stainless steel sheet specifications, UNS S34709 plate specifications, ASME SA 240 Gr 347H coil, ASME SA 240 Gr 347H bar

Applications of ASTM A240/ASME SA240 UNS S34709 Stainless Steel 347H Sheet

 

ASTM A240/ASME SA240 UNS S34709 stainless steel 347H sheetis tailored for industries requiring high-temperature strength, corrosion resistance, and weldability. Its high carbon content and columbium stabilization ensure excellent performance in demanding environments.

Key ASTM A240/ASME SA240 UNS S34709 applications include:

• Aerospace: sa 240/a 240 uns s34709 sheets for welded jet engine components and exhaust systems.
• Chemical Processing: UNS S34709 plates for reactors and heat exchangers.
• Power Generation: ASTM A240/ASME SA240 UNS S34709 bars for boiler components and superheaters.
• Petrochemical: Piping and fittings for high-temperature environments.
• Industrial Furnaces: Components requiring creep and oxidation resistance.

Case Study: A petrochemical plant in the UAE used sa 240/a 240 uns s34709 sheets for high-temperature reactor linings, reducing maintenance by 25% due to its creep resistance compared to sa 240/a 240 uns s34700.

Keywords: ASTM A240/ASME SA240 UNS S34709 applications, UNS S34709 uses, high-carbon columbium-stabilized stainless steel applications, ASME SA240 Gr 347H applications

ASTM A240/ASME SA240 UNS S34709 vs Related Grades

 

To aid in material selection, here’s a comparison of sa 240/a 240 uns s34709 with sa 240/a 240 uns s34700, sa 240/a 240 uns s32100, and sa 240/a 240 uns s30409:

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 S34709	ASME SA240 UNS S34700	ASME SA240 UNS S32100	ASME SA240 UNS S30409
UNS Number	S34709	S34700	S32100	S30409
Type	Austenitic	Austenitic	Austenitic	Austenitic
Chromium Content	17.0-19.0%	17.0-19.0%	17.0-19.0%	18.0-20.0%
Nickel Content	9.0-13.0%	9.0-13.0%	9.0-12.0%	8.0-10.5%
Stabilizer	Columbium (10xC min – 1.0%)	Columbium (10xC min – 1.0%)	Titanium (5xC min – 0.70%)	-
Carbon Content	0.04-0.10%	≤ 0.08%	≤ 0.08%	0.04-0.10%
Corrosion Resistance	Good in high temps	Good in oxidizing environments	Good in oxidizing environments	Good in mild environments
Strength	High at high temps	Moderate	Moderate	High at high temps
Temp Range	Up to 900°C (1652°F)	Up to 900°C (1652°F)	Up to 900°C (1652°F)	Up to 870°C (1598°F)
Cost (USD/kg)	6-12	6-12	6-12	5-10
Applications	High-temp chemical, aerospace	Aerospace, chemical	Aerospace, chemical	High-temp chemical

• ASTM A240/ASME SA240 UNS S34709 vs ASME SA240 UNS S34700: S34709 offers enhanced creep resistance due to higher carbon, ideal for high-temperature applications, while sa 240/a 240 uns s34700 provides better weldability for general high-temperature uses.
• ASTM A240/ASME SA240 UNS S34709 vs ASME SA240 UNS S32100: S34709 uses columbium for stabilization, while sa 240/a 240 uns s32100 uses titanium, offering similar high-temperature performance with slight differences in weldability.
• ASTM A240/ASME SA240 UNS S34709 vs ASME SA240 UNS S30409: S34709 excels in high-temperature welded applications due to columbium stabilization, while sa 240/a 240 uns s30409 is cost-effective for high-temperature environments without stabilization.

Conclusion: Choose sa 240/a 240 uns s34709 for high-temperature applications requiring creep resistance, sa 240/a 240 uns s34700 for welded high-temperature uses, sa 240/a 240 uns s32100 for titanium-stabilized applications, or sa 240/a 240 uns s30409 for cost-effective high-temperature applications.

Keywords: ASTM A240/ASME SA240 UNS S34709 vs ASME SA240 UNS S34700, ASTM A240/ASME SA240 UNS S34709 vs ASME SA240 UNS S32100, ASTM A240/ASME SA240 UNS S34709 vs ASME SA240 UNS S30409, 347H stainless steel comparison

ASTM A240/ASME SA240 UNS S34709 Equivalent Materials

 

ASTM A240/ASME SA240 UNS S34709aligns 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 S34709 a versatile choice for high-temperature applications.

Standard	Grade
UNS	S34709
W.Nr.	1.4940
EN	X6CrNiNb18-10
JIS	SUS 347H
GB	1Cr18Ni11Nb
ASTM	A240 347h
ASME	SA240 347h

Note: ASTM A240/ASME SA240 UNS S34709 equivalent grades comply with sa 240/a 240 uns stainless grades, JIS, and GB standards, offering interchangeability with sa 240/a 240 uns s34700 for general high-temperature applications.

Keywords: ASTM A240/ASME SA240 UNS S34709 equivalent, UNS S34709 equivalent, ASME SA 240 Gr 347H material standards, JIS SUS 347H, GB 1Cr18Ni11Nb

ASTM A240/ASME SA240 UNS S34709 Allowable Stress

 

The allowable stress values for ASTM A240/ASME SA240 UNS S34709, per ASME BPVC Section II, Part D, ensure reliable performance in high-temperature environments.

These values reflect the material’s ability to withstand mechanical stresses while maintaining corrosion resistance in high-temperature and oxidizing conditions.

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 s34709 performs reliably in superheater components and chemical reactors.

Keywords: ASTM A240/ASME SA240 UNS S34709 allowable stress, UNS S34709 high-temperature strength, ASME SA240 Gr 347H material stress

ASTM A240/ASME SA240 UNS S34709 Price

 

The ASTM A240/ASME SA240 UNS S34709 price per kg ranges from USD 6-12 per kg (FOB), influenced by several factors:

The balance of high-temperature strength, creep resistance, and cost makes ASTM A240/ASME SA240 UNS S34709 a preferred choice for demanding industrial applications.

• Alloy Content: Columbium stabilization and higher carbon content increase costs slightly compared to sa 240/a 240 uns s34700.
• Market Demand: High demand in aerospace and chemical industries drives UNS S34709 price.
• Product Form: ASTM A240/ASME SA240 UNS S34709 plates may cost more than sheets due to processing complexity.
• Global Supply Chain: Freight and raw material availability impact ASTM A240/ASME SA240 UNS S34709 cost.

For a precise ASTM A240/ASME SA240 UNS S34709 price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.

Keywords: ASTM A240/ASME SA240 UNS S34709 price per kg, UNS S34709 cost, high-carbon columbium-stabilized stainless steel price

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 s34709 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 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 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 s34709 in aerospace, chemical, and high-temperature applications. Contact Gangsteel for a full catalog to find the perfect material for your project.

Keywords: ASTM A240/ASME SA240 UNS S34709 related grades, UNS S34709 stainless steel grades, 347H series stainless steel grades

FAQ

 

Q: What is the main difference between ASTM A240/ASME SA240 UNS S34709 and ASME SA240 UNS S34700?

A: ASTM A240/ASME SA240 UNS S34709 has higher carbon content for enhanced creep resistance in high-temperature applications, while sa 240/a 240 uns s34700 offers better weldability for general high-temperature uses.

Q: Is ASTM A240/ASME SA240 UNS S34709 suitable for aerospace applications?

A: Yes, its high carbon content and columbium stabilization ensure excellent creep and corrosion resistance, making it ideal for aerospace components compared to sa 240/a 240 uns s30409.

Q: How does the price of ASTM A240/ASME SA240 UNS S34709 compare to ASME SA240 UNS S32100?

A: ASTM A240/ASME SA240 UNS S34709 is comparably priced to sa 240/a 240 uns s32100, with slight variations due to columbium vs. titanium stabilization, offering similar high-temperature performance.

Keywords: ASTM A240/ASME SA240 UNS S34709 FAQ, UNS S34709 stainless steel questions, high-carbon columbium-stabilized stainless steel sheet FAQ

Contact Us

 

For sa 240/a 240 uns s34709 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.

Keywords: ASTM A240/ASME SA240 UNS S34709 supplier, Gangsteel stainless steel exporter, UNS S34709 sheet supplier

Long-Tail Keywords

 

ASTM A240/ASME SA240 UNS S34709 stainless steel 347H sheet, UNS S34709 applications, ASME SA240 Gr 347H mechanical properties