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For applications requiring high strength, exceptional corrosion resistance, and durability in aggressive environments, ASTM A240/ASME SA240 UNS S32550 Stainless Steel 255 Sheet is a premier choice. As a leading uns stainless supplier, Gangsteel offers high-quality sa 240/a 240 uns s32550 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 S32550 chemical composition, mechanical properties, equivalent materials, specifications, applications, and competitive ASTM A240/ASME SA240 UNS S32550 price per kg. Whether you're an engineer designing chemical processing equipment or a procurement specialist sourcing for marine applications, this article will clarify why 255 (UNS S32550), also known as Ferralium 255, is a trusted option. Explore our sa 240/a 240 uns stainless grades portfolio for related grades like sa 240/a 240 uns s32750, sa 240/a 240 uns s32520, sa 240/a 240 uns s31803, and sa 240/a 240 uns s20100.
ASTM A240/ASME SA240 UNS S32550, commonly known as Ferralium 255 or 255 stainless steel, is a super-duplex stainless steel with 24.0-27.0% chromium, 4.5-6.5% nickel, 2.9-3.9% molybdenum, 1.5-2.5% copper, and 0.1-0.25% nitrogen. Its balanced ferritic-austenitic microstructure provides exceptional strength, nearly twice that of austenitic grades like sa 240/a 240 uns s31600, and outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking in chloride-rich and acidic environments, particularly sulfuric acid. This makes it ideal for chemical processing, marine, and oil and gas applications.
The high copper content enhances ASTM A240/ASME SA240 UNS S32550 stainless steel 255 sheet corrosion resistance in acidic environments, with a pitting resistance equivalent number (PREN) of ~38-41, comparable to sa 240/a 240 uns s32750. Its high strength, excellent weldability, and resistance to aggressive environments make it a preferred choice for critical applications.
Key benefits of ASTM A240/ASME SA240 UNS S32550 stainless steel 255 sheet include:
Case Study: A chemical plant in India used sa 240/a 240 uns s32550 sheets for sulfuric acid storage tanks, achieving a 50% longer service life due to its superior acid resistance compared to sa 240/a 240 uns s32520.
Keywords: ASTM A240/ASME SA240 UNS S32550 stainless steel 255 sheet, UNS S32550 sheet, super-duplex stainless steel, acid-resistant stainless steel sheet
The ASTM A240/ASME SA240 UNS S32550 chemical composition is optimized for high strength, corrosion resistance, and weldability, compliant with sa 240/a 240 uns stainless grades standards.
The high chromium (24.0-27.0%), molybdenum (2.9-3.9%), nitrogen (0.1-0.25%), and copper (1.5-2.5%) content provide a PREN of ~38-41, ensuring excellent corrosion resistance, particularly in sulfuric acid environments. The low carbon content (≤ 0.04%) enhances weldability, making ASTM A240/ASME SA240 UNS S32550 ideal for aggressive environments compared to sa 240/a 240 uns s32750.
|
Element |
Percentage (%) |
|---|---|
|
Chromium (Cr) |
24.0 – 27.0 |
|
Nickel (Ni) |
4.5 – 6.5 |
|
Molybdenum (Mo) |
2.9 – 3.9 |
|
Nitrogen (N) |
0.1 – 0.25 |
|
Copper (Cu) |
1.5 – 2.5 |
|
Carbon (C) |
≤ 0.04 |
|
Manganese (Mn) |
≤ 1.5 |
|
Silicon (Si) |
≤ 1.0 |
|
Phosphorus (P) |
≤ 0.040 |
|
Sulfur (S) |
≤ 0.030 |
|
Iron (Fe) |
Balance (~60%) |
Keywords: ASTM A240/ASME SA240 UNS S32550 chemical composition, UNS S32550 composition, super-duplex stainless steel chemistry, ASME SA240 Gr 255 composition
The ASTM A240/ASME SA240 UNS S32550 mechanical properties offer a balance of exceptional strength, ductility, and corrosion resistance, ideal for demanding applications.
These properties ensure that ASTM A240/ASME SA240 UNS S32550 stainless steel 255 sheet can withstand high mechanical stresses in aggressive environments, with significantly higher yield strength than sa 240/a 240 uns s31600. Solution annealing at 1025-1125°C (1877-2057°F) optimizes UNS S32550 mechanical properties for strength and corrosion resistance.
|
Property |
Value at 20°C |
|---|---|
|
Tensile Strength (MPa) |
≥ 760 (110 ksi) |
|
Yield Strength (MPa) |
≥ 550 (80 ksi) |
|
Elongation (%) |
≥ 15 |
|
Hardness (HBW) |
≤ 297 |
|
Density |
7.8 g/cm³ (0.282 lb/in³) |
At Gangsteel, we’ve seen clients use sa 240/a 240 uns s32550 sheets in chemical processing equipment, where its high strength and acid resistance outperform sa 240/a 240 uns s31803.
Keywords: ASTM A240/ASME SA240 UNS S32550 mechanical properties, UNS S32550 strength, super-duplex stainless steel properties, ASME SA240 Gr 255 mechanical properties
As a trusted uns stainless supplier, Gangsteel supplies sa 240/a 240 uns s32550 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.
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 S32550 material specifications.
Keywords: ASTM A240/ASME SA240 UNS S32550 stainless steel sheet specifications, UNS S32550 plate specifications, ASME SA 240 Gr 255 coil, ASME SA 240 Gr 255 bar
ASTM A240/ASME SA240 UNS S32550 stainless steel 255 sheetis tailored for industries requiring high strength and exceptional corrosion resistance in aggressive environments, particularly those involving sulfuric acid. Its super-duplex microstructure ensures durability and performance in demanding applications.
Key ASTM A240/ASME SA240 UNS S32550 applications include:
Case Study: A pulp and paper mill in India used sa 240/a 240 uns s32550 sheets for bleaching equipment, reducing corrosion-related downtime by 45% compared to sa 240/a 240 uns s31803 due to its enhanced acid resistance.
Keywords: ASTM A240/ASME SA240 UNS S32550 applications, UNS S32550 uses, super-duplex stainless steel applications, ASME SA240 Gr 255 applications
To aid in material selection, here’s a comparison of sa 240/a 240 uns s32550 with sa 240/a 240 uns s32750, sa 240/a 240 uns s32520, sa 240/a 240 uns s31600, and sa 240/a 240 uns s20100:
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 S32550 |
ASME SA240 UNS S32750 |
ASME SA240 UNS S32520 |
ASME SA240 UNS S31600 |
ASME SA240 UNS S20100 |
|---|---|---|---|---|---|
|
UNS Number |
S32550 |
S32750 |
S32520 |
S31600 |
S20100 |
|
Type |
Super-Duplex |
Super-Duplex |
Super-Duplex |
Austenitic |
Austenitic |
|
Chromium Content |
24.0-27.0% |
24.0-26.0% |
24.0-26.0% |
16.0-18.0% |
16.0-18.0% |
|
Nickel Content |
4.5-6.5% |
6.0-8.0% |
5.5-8.0% |
10.0-14.0% |
3.5-5.5% |
|
Molybdenum Content |
2.9-3.9% |
3.0-5.0% |
3.0-4.0% |
2.0-3.0% |
- |
|
Nitrogen Content |
0.1-0.25% |
0.24-0.32% |
0.2-0.35% |
- |
0.25% max |
|
Copper Content |
1.5-2.5% |
≤ 0.5% |
0.5-2.0% |
- |
- |
|
Carbon Content |
≤ 0.04% |
≤ 0.03% |
≤ 0.03% |
≤ 0.08% |
≤ 0.15% |
|
Corrosion Resistance |
Exceptional in acids, chlorides |
Exceptional in chlorides, acids |
Exceptional in chlorides, acids |
Excellent in chlorides |
Moderate in mild environments |
|
Strength |
Very High |
Very High |
Very High |
Moderate |
Moderate |
|
Temp Range |
-50°C to 300°C (-58°F to 572°F) |
-50°C to 300°C |
-50°C to 300°C |
Up to 870°C (1598°F) |
Up to 870°C (1598°F) |
|
Cost (USD/kg) |
7-12 |
7-12 |
7-12 |
6-12 |
3-6 |
|
Applications |
Chemical, marine, oil/gas |
Marine, chemical, oil/gas |
Marine, chemical, oil/gas |
Marine, chemical |
General-purpose, architectural |
Conclusion: Choose sa 240/a 240 uns s32550 for exceptional acid resistance and strength in aggressive environments, sa 240/a 240 uns s32750 for versatile super-duplex applications, sa 240/a 240 uns s32520 for chloride-rich environments, sa 240/a 240 uns s31600 for high-temperature versatility, or sa 240/a 240 uns s20100 for low-cost, general-purpose applications.
Keywords: ASTM A240/ASME SA240 UNS S32550 vs ASME SA240 UNS S32750, ASTM A240/ASME SA240 UNS S32550 vs ASME SA240 UNS S32520, ASTM A240/ASME SA240 UNS S32550 vs ASME SA240 UNS S31600, ASTM A240/ASME SA240 UNS S32550 vs ASME SA240 UNS S20100, Ferralium 255 stainless steel comparison
ASTM A240/ASME SA240 UNS S32550aligns 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 S32550 a versatile choice for corrosion-resistant applications.
|
Standard |
Grade |
|---|---|
|
UNS |
S32550 |
|
W.Nr. |
1.4507 |
|
EN |
X2CrNiMoCuN25-6-3 |
|
JIS |
SUS 329J4L |
|
ASTM |
A240 255 |
|
ASME |
SA240 255 |
Note: ASTM A240/ASME SA240 UNS S32550 equivalent grades comply with sa 240/a 240 uns stainless grades and EN standards, offering interchangeability with sa 240/a 240 uns s32520 for similar super-duplex applications.
Keywords: ASTM A240/ASME SA240 UNS S32550 equivalent, UNS S32550 equivalent, ASME SA 240 Gr 255 material standards, EN X2CrNiMoCuN25-6-3, JIS SUS 329J4L
The allowable stress values for ASTM A240/ASME SA240 UNS S32550, per ASME BPVC Section II, Part D, ensure reliable performance in corrosive and high-strength applications.
These values reflect the material’s ability to withstand high mechanical stresses while maintaining corrosion resistance in chloride-rich and acidic environments.
|
Temperature (°C) |
Allowable Stress (MPa) |
|---|---|
|
100 |
230 |
|
200 |
210 |
|
300 |
200 |
Note: These values ensure sa 240/a 240 uns s32550 performs reliably in chemical processing tanks and marine piping.
Keywords: ASTM A240/ASME SA240 UNS S32550 allowable stress, UNS S32550 strength, ASME SA240 Gr 255 material stress
The ASTM A240/ASME SA240 UNS S32550 price per kg ranges from USD 7-12 per kg (FOB), influenced by several factors:
The exceptional strength and corrosion resistance of ASTM A240/ASME SA240 UNS S32550 make it a premium choice for demanding applications in aggressive environments.
For a precise ASTM A240/ASME SA240 UNS S32550 price per kg or bulk discounts, contact Gangsteel at admin@gangsteel.com.
Keywords: ASTM A240/ASME SA240 UNS S32550 price per kg, UNS S32550 cost, super-duplex stainless steel 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 s32550 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 s32550 in chemical, marine, and oil/gas applications. Contact Gangsteel for a full catalog to find the perfect material for your project.
Keywords: ASTM A240/ASME SA240 UNS S32550 related grades, UNS S32550 stainless steel grades, Ferralium 255 series stainless steel grades
Q: What is the main difference between ASTM A240/ASME SA240 UNS S32550 and ASME SA240 UNS S32750?
A: ASTM A240/ASME SA240 UNS S32550 offers superior resistance to sulfuric acid due to higher copper content, while sa 240/a 240 uns s32750 is optimized for broader chloride resistance in super-duplex applications.
Q: Is ASTM A240/ASME SA240 UNS S32550 suitable for chemical processing applications?
A: Yes, its high copper content and super-duplex structure ensure exceptional resistance to sulfuric acid and chlorides, making it ideal for chemical processing tanks compared to sa 240/a 240 uns s31803.
Q: How does the price of ASTM A240/ASME SA240 UNS S32550 compare to ASME SA240 UNS S20100?
A: ASTM A240/ASME SA240 UNS S32550 is typically 50-60% more expensive than sa 240/a 240 uns s20100 due to its higher alloy content and superior corrosion resistance, offering better performance in aggressive environments.
Keywords: ASTM A240/ASME SA240 UNS S32550 FAQ, UNS S32550 stainless steel questions, super-duplex stainless steel sheet FAQ
For sa 240/a 240 uns s32550 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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ASTM A240/ASME SA240 UNS S32550 stainless steel 255 sheet, UNS S32550 applications, ASME SA240 Gr 255 mechanical properties
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