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For applications requiring excellent high-temperature corrosion resistance, superior weldability, and moderate strength, ASME SA240/ASTM A240 UNS S31040 Stainless Steel Sheet (commonly known as 310Cb) is an outstanding choice.
As a leading uns stainless supplier, Gangsteel specializes in providing high-quality sa 240/a 240 uns s31040 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 manufacturing capabilities, Gangsteel ensures rapid delivery and tailored solutions for clients worldwide.
This comprehensive guide explores the ASME SA240/ASTM A240 UNS S31040 chemical composition, density, mechanical properties, corrosion resistance, weldability, stainless steel surface finishes, equivalent materials, specifications, applications, and competitive ASME SA240/ASTM A240 UNS S31040 price per kg. Whether you're an engineer designing furnace components or a procurement specialist sourcing for petrochemical applications, this article will clarify why 310Cb stainless steel (UNS S31040) is a trusted option. Explore our sa 240/a 240 uns stainless grades portfolio for related grades like sa 240/a 240 uns s30615, sa 240/a 240 uns s30815, sa 240/a 240 uns s30909, sa 240/a 240 uns s30940, sa 240/a 240 uns s31041, sa 240/a 240 uns s31050, and sa 240/a 240 uns s31060.
ASME SA240/ASTM A240 UNS S31040, known as 310Cb, is an austenitic stainless steel with 24.0-26.0% chromium, 19.0-22.0% nickel, and niobium stabilization for enhanced weldability. It is designed for high-temperature applications requiring excellent corrosion resistance, superior weldability, and moderate strength, making it ideal for industries such as petrochemical, power generation, and furnace manufacturing. The niobium addition stabilizes the material against sensitization during welding, improving performance compared to sa 240/a 240 uns s31060, while the high chromium and nickel content ensure robust oxidation resistance up to 1100°C (2012°F).
The ASME SA240/ASTM A240 UNS S31040 stainless steel sheet offers superior weldability compared to sa 240/a 240 uns s30909 and better high-temperature corrosion resistance than sa 240/a 240 uns s30815 due to its higher chromium and nickel content. While it is less corrosion-resistant in highly aggressive environments than grades like sa 240/a 240 uns s31050, its weldability and high-temperature performance make it a preferred choice for welded furnace and heat exchanger components.
Key benefits of ASME SA240/ASTM A240 UNS S31040 stainless steel sheet include:
Case Study: A petrochemical plant in India used sa 240/a 240 uns s31040 sheets for welded heat exchanger tubes, achieving a 25% reduction in welding defects compared to sa 240/a 240 uns s30909 due to its superior weldability and corrosion resistance.
Keywords: ASME SA240/ASTM A240 UNS S31040 stainless steel sheet, UNS S31040 sheet, 310Cb stainless steel, weldable stainless steel sheet
The density of ASME SA240/ASTM A240 UNS S31040 stainless steel sheet is approximately 7.89 g/cm³ (0.285 lb/in³). This density is typical for high-chromium and high-nickel austenitic stainless steels, reflecting the material's composition, which includes niobium stabilization. The consistent density ensures predictable performance in applications requiring precise weight calculations, such as furnace components and heat exchangers. Compared to grades like sa 240/a 240 uns s30815 (7.80 g/cm³) and sa 240/a 240 uns s31050 (7.89 g/cm³), the density is similar, making UNS S31040 a reliable choice for weight-sensitive high-temperature applications.
Keywords: ASME SA240/ASTM A240 UNS S31040 density, UNS S31040 density, 310Cb density
ASME SA240/ASTM A240 UNS S31040offers excellent corrosion resistance in high-temperature environments, such as petrochemical and power generation settings. Its 24.0-26.0% chromium and 19.0-22.0% nickel content provide a robust protective oxide layer, with a pitting resistance equivalent number (PREN) of ~24-26, suitable for applications like furnace linings and heat exchanger tubes. It outperforms sa 240/a 240 uns s30615 and sa 240/a 240 uns s30940 in high-temperature corrosion resistance due to its higher chromium and nickel content. For highly corrosive environments, such as chloride-rich conditions, grades like sa 240/a 240 uns s31050 or sa 240/a 240 uns s31254 are recommended.
Keywords: ASME SA240/ASTM A240 UNS S31040 corrosion resistance, UNS S31040 corrosion properties, 310Cb corrosion resistance
The niobium stabilization in ASME SA240/ASTM A240 UNS S31040 ensures superior weldability by preventing carbide precipitation and intergranular corrosion during welding, making it more weldable than sa 240/a 240 uns s31041. It can be welded using common techniques such as TIG, MIG, and shielded metal arc welding, with niobium-containing filler materials to maintain corrosion resistance and high-temperature strength. Compared to sa 240/a 240 uns s30815, UNS S31040 offers better weldability due to niobium stabilization, making it ideal for welded structures in high-temperature environments. For applications requiring even lower carbon content for enhanced weldability, sa 240/a 240 uns s31050 is a viable alternative.
Keywords: ASME SA240/ASTM A240 UNS S31040 weldability, UNS S31040 welding properties, 310Cb weldability
The surface finish of ASME SA240/ASTM A240 UNS S31040 stainless steel sheet significantly impacts its aesthetic appeal, functionality, and application suitability. Gangsteel offers a variety of surface finishes to meet diverse project requirements, as detailed below:
|
Surface Finish |
Definition/Feature |
Summary of Manufacturing Method |
Application/Use |
|---|---|---|---|
|
NO.1 |
Silver white, matte |
Hot rolled to specified thickness, followed by heat treatment and pickling |
Chemical tank, pipe, no need for surface gloss purposes |
|
2B |
Stronger gloss than NO.2D |
Cold rolled, heat treated, pickled, and lightly cold rolled by polishing rollers |
Medical equipment, food industry, construction material, kitchen utensils, general materials |
|
NO.2D/2BB |
Silver white |
Heat treatment and pickling after cold rolling |
General materials, deep drawing materials |
|
NO.3 |
Rough grinding |
Polished with No.100 to No.120 abrasives (JIS R6001) or 100~200# grinding belt |
Kitchen utensils, building construction, building materials |
|
NO.4 (4K) |
Intermediate grinding |
Polished with No.150 to No.180 abrasives (JIS R6001) or 150~180# stone abrasive belt |
Kitchen utensils, building construction, medical equipment, building materials |
|
NO.240 |
Fine grinding |
Grinding with 240# stone abrasive belt |
Kitchenware |
|
NO.320 |
Very fine grinding |
Grinding with 320# abrasive belt |
Kitchenware |
|
NO.400 |
Gloss close to BA |
Grinding with 400# polishing wheel |
General timber, construction timber, kitchen utensils |
|
HL |
Hairline grinding, continuous polishing streaks |
Polished with suitable grain size abrasive (150~240#) for hairline grinding |
Building construction, buildings, construction materials |
|
BA (No.6/BA1/BA0) |
Bright as a mirror |
Bright heat treatment after cold rolling, high surface reflectivity |
Kitchen utensils, electric equipment, building construction, building materials |
|
NO.7 |
Close to mirror polishing |
Grinding with 600# rotary polishing wheel |
For art and decoration |
|
NO.8 (Mirror/8K) |
Shining like a mirror |
Grinding mirrors with polishing wheels |
Building construction, reflector, for decoration |
These surface finishes allow sa 240/a 240 uns s31040 to be tailored for aesthetic or functional requirements, such as the NO.1 finish for furnace components or the 2B finish for petrochemical applications.
Keywords: ASME SA240/ASTM A240 UNS S31040 surface finish, UNS S31040 stainless steel surface, 310Cb surface finishes
The ASME SA240/ASTM A240 UNS S31040 chemical composition is optimized for high-temperature corrosion resistance and weldability, compliant with sa 240/a 240 uns stainless grades standards.
The high chromium (24.0-26.0%) and nickel (19.0-22.0%) content, along with niobium stabilization, provide excellent corrosion resistance and weldability compared to sa 240/a 240 uns s31060.
|
Element |
Percentage (%) |
|---|---|
|
Chromium (Cr) |
24.0 – 26.0 |
|
Nickel (Ni) |
19.0 – 22.0 |
|
Carbon (C) |
≤ 0.08 |
|
Manganese (Mn) |
≤ 2.0 |
|
Silicon (Si) |
≤ 1.50 |
|
Phosphorus (P) |
≤ 0.045 |
|
Sulfur (S) |
≤ 0.030 |
|
Niobium (Nb) |
10xC – 1.10 |
|
Iron (Fe) |
Balance (~55%) |
Keywords: ASME SA240/ASTM A240 UNS S31040 chemical composition, UNS S31040 composition, 310Cb chemistry, ASME SA240 Gr S31040 composition
The ASME SA240/ASTM A240 UNS S31040 mechanical properties offer a balance of moderate strength, good ductility, and excellent high-temperature corrosion resistance, suitable for welded high-temperature applications.
These properties ensure that ASME SA240/ASTM A240 UNS S31040 stainless steel sheet can withstand mechanical stresses in high-temperature environments. Solution annealing at 1040-1120°C (1904-2048°F) optimizes UNS S31040 mechanical properties for corrosion resistance and weldability.
|
Property |
Value at 20°C |
|---|---|
|
Tensile Strength (MPa) |
≥ 515 (75 ksi) |
|
Yield Strength (MPa) |
≥ 205 (30 ksi) |
|
Elongation (%) |
≥ 40 |
|
Hardness (HBW) |
≤ 217 |
|
Density |
7.89 g/cm³ (0.285 lb/in³) |
At Gangsteel, we’ve seen clients use sa 240/a 240 uns s31040 sheets in petrochemical reactors, where its weldability and corrosion resistance provide advantages over sa 240/a 240 uns s30909.
Keywords: ASME SA240/ASTM A240 UNS S31040 mechanical properties, UNS S31040 strength, 310Cb mechanical properties, ASME SA240 Gr S31040 mechanical properties
As a trusted uns stainless supplier, Gangsteel supplies sa 240/a 240 uns s31040 sheets, plates, 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.
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 ASME SA240/ASTM A240 UNS S31040 material specifications.
Keywords: ASME SA240/ASTM A240 UNS S31040 stainless steel sheet specifications, UNS S31040 sheet specifications, ASME SA 240 Gr S31040 coil, ASME SA 240 Gr S31040 bar
ASME SA240/ASTM A240 UNS S31040 stainless steel sheetis tailored for industries requiring excellent high-temperature corrosion resistance and superior weldability. Its niobium-stabilized austenitic structure ensures durability in demanding environments.
Key ASME SA240/ASTM A240 UNS S31040 applications include:
Case Study: A power generation facility in India used sa 240/a 240 uns s31040 sheets for welded boiler tubes, achieving a 20% reduction in maintenance costs compared to sa 240/a 240 uns s31060 due to its superior weldability.
Keywords: ASME SA240/ASTM A240 UNS S31040 applications, UNS S31040 uses, 310Cb applications, ASME SA240 Gr S31040 applications
To aid in material selection, here’s a comparison of sa 240/a 240 uns s31040 with sa 240/a 240 uns s30615, sa 240/a 240 uns s30815, sa 240/a 240 uns s30909, sa 240/a 240 uns s30940, sa 240/a 240 uns s31041, sa 240/a 240 uns s31050, and sa 240/a 240 uns s31060:
This comparison highlights the unique advantages of each grade, helping you select the optimal material for your project requirements.
|
Property |
ASME SA240/ASTM A240 UNS S31040 |
ASME SA240 UNS S30615 |
ASME SA240 UNS S30815 |
ASME SA240 UNS S30909 |
ASME SA240 UNS S30940 |
ASME SA240 UNS S31041 |
ASME SA240 UNS S31050 |
ASME SA240 UNS S31060 |
|---|---|---|---|---|---|---|---|---|
|
UNS Number |
S31040 |
S30615 |
S30815 |
S30909 |
S30940 |
S31041 |
S31050 |
S31060 |
|
Type |
Austenitic |
Austenitic |
Austenitic |
Austenitic |
Austenitic |
Austenitic |
Austenitic |
Austenitic |
|
Chromium Content |
24.0-26.0% |
18.0-19.5% |
20.0-22.0% |
22.0-24.0% |
22.0-24.0% |
24.0-26.0% |
24.0-26.0% |
24.0-26.0% |
|
Nickel Content |
19.0-22.0% |
13.5-15.0% |
10.0-12.0% |
12.0-15.0% |
12.0-15.0% |
19.0-22.0% |
21.0-23.0% |
19.0-22.0% |
|
Manganese Content |
≤ 2.0 |
≤ 2.0 |
≤ 0.80 |
≤ 2.0 |
≤ 2.0 |
≤ 2.0 |
≤ 2.0 |
≤ 2.0 |
|
Molybdenum Content |
- |
0.80-1.20% |
- |
- |
- |
- |
2.0-3.0% |
- |
|
Nitrogen Content |
- |
0.15-0.25% |
0.14-0.20% |
- |
- |
- |
0.10-0.16% |
- |
|
Carbon Content |
≤ 0.08% |
≤ 0.05% |
0.05-0.10% |
0.04-0.10% |
≤ 0.08% |
0.04-0.10% |
≤ 0.030% |
≤ 0.08% |
|
Corrosion Resistance |
Good in high-temperature environments |
Excellent in high-temperature environments |
Excellent in high-temperature environments |
Good in high-temperature environments |
Good in high-temperature environments |
Good in high-temperature environments |
Excellent in chemical environments |
Good in high-temperature environments |
|
Strength |
Moderate |
High (High-temperature) |
High (High-temperature) |
High (High-temperature) |
Moderate |
High (High-temperature) |
High (Chemical resistance) |
Moderate |
|
Temp Range |
Up to 1100°C (2012°F) |
Up to 950°C (1742°F) |
Up to 1150°C (2102°F) |
Up to 1000°C (1832°F) |
Up to 1000°C (1832°F) |
Up to 1100°C (2012°F) |
Up to 1100°C (2012°F) |
Up to 1100°C (2012°F) |
|
Cost (USD/kg) |
6-9 |
6-9 |
6-9 |
5-8 |
5-8 |
6-9 |
7-10 |
6-9 |
|
Applications |
High-temperature welded structures |
High-temperature equipment, chemical processing |
Furnace components, petrochemical |
Heat exchangers, furnace components |
High-temperature welded structures |
High-temperature equipment |
Chemical processing, high-temperature |
High-temperature equipment |
Conclusion: Choose sa 240/a 240 uns s31040 for weldable, high-temperature corrosion-resistant applications, sa 240/a 240 uns s30615 for corrosion resistance in moderately corrosive environments, sa 240/a 240 uns s30815 for high-temperature strength, sa 240/a 240 uns s30909 or sa 240/a 240 uns s31041 for higher strength, sa 240/a 240 uns s30940 for cost-effective high-temperature applications, or sa 240/a 240 uns s31050 or sa 240/a 240 uns s31060 for specific chemical or high-temperature needs.
Keywords: ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S30615, ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S30815, ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S30909, ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S30940, ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S31041, ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S31050, ASME SA240/ASTM A240 UNS S31040 vs ASME SA240 UNS S31060, 310Cb comparison
ASME SA240/ASTM A240 UNS S31040aligns 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 ASME SA240/ASTM A240 UNS S31040 a versatile choice for weldable high-temperature applications.
|
Standard |
Grade |
|---|---|
|
UNS |
S31040 |
|
W.Nr. |
1.4845 |
|
EN |
X8CrNiNb25-21 |
|
ASTM |
A240 |
|
ASME |
SA240 |
Note: ASME SA240/ASTM A240 UNS S31040 equivalent grades comply with sa 240/a 240 uns stainless grades standards, offering interchangeability with sa 240/a 240 uns s30940 for similar applications.
Keywords: ASME SA240/ASTM A240 UNS S31040 equivalent, UNS S31040 equivalent, ASME SA 240 Gr S31040 material standards, EN X8CrNiNb25-21
The allowable stress values for ASME SA240/ASTM A240 UNS S31040, 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 at elevated temperatures while maintaining corrosion resistance.
|
Temperature (°C) |
Allowable Stress (MPa) |
|---|---|
|
100 |
130 |
|
200 |
120 |
|
300 |
110 |
|
400 |
100 |
|
500 |
90 |
Note: These values ensure sa 240/a 240 uns s31040 performs reliably in petrochemical and furnace applications.
Keywords: ASME SA240/ASTM A240 UNS S31040 allowable stress, UNS S31040 strength, ASME SA240 Gr S31040 material stress
The ASME SA240/ASTM A240 UNS S31040 price per kg ranges from USD 6-9 per kg (FOB), influenced by several factors:
The excellent weldability and high-temperature corrosion resistance of ASME SA240/ASTM A240 UNS S31040 make it a valuable choice for petrochemical and power generation applications.
For a precise ASME SA240/ASTM A240 UNS S31040 price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.
Keywords: ASME SA240/ASTM A240 UNS S31040 price per kg, UNS S31040 cost, 310Cb price
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 s31040 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.
Note: These grades complement sa 240/a 240 uns s31040 in high-temperature and corrosion-resistant applications. Contact Gangsteel for a full catalog to find the perfect material for your project.
Keywords: ASME SA240/ASTM A240 UNS S31040 related grades, UNS S31040 stainless steel grades, 310Cb grades
Q: What is the main difference between ASME SA240/ASTM A240 UNS S31040 and ASME SA240 UNS S31041?
A: ASME SA240/ASTM A240 UNS S31040 offers superior weldability due to its lower carbon content (≤ 0.08%) and niobium stabilization, while sa 240/a 240 uns s31041 provides higher high-temperature strength due to its elevated carbon content (0.04-0.10%).
Q: Is ASME SA240/ASTM A240 UNS S31040 suitable for welded furnace applications?
A: Yes, its superior weldability and excellent high-temperature corrosion resistance make it ideal for welded furnace components compared to sa 240/a 240 uns s30909.
Q: How does the price of ASME SA240/ASTM A240 UNS S31040 compare to ASME SA240 UNS S31050?
A: ASME SA240/ASTM A240 UNS S31040 is typically 20-30% less expensive than sa 240/a 240 uns s31050 due to the absence of molybdenum, offering cost-effective performance for high-temperature applications.
Keywords: ASME SA240/ASTM A240 UNS S31040 FAQ, UNS S31040 stainless steel questions, 310Cb FAQ
For sa 240/a 240 uns s31040 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: ASME SA240/ASTM A240 UNS S31040 supplier, Gangsteel stainless steel exporter, UNS S31040 sheet supplier
ASME SA240/ASTM A240 UNS S31040 stainless steel sheet, UNS S31040 applications, ASME SA240 Gr S31040 mechanical properties
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