What is the difference between S32750 and 2507?
Jan 19, 2026
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What is the difference between S32750 and 2507?
There is no difference; S32750 and 2507 refer to the same super duplex stainless steel alloy, with S32750 being its UNS (Unified Numbering System) designation and 2507 its common trade name, highlighting its composition (around 25% Chromium, 7% Nickel, 4% Molybdenum) for high strength and excellent corrosion resistance, especially against chlorides.
What is S32750 material?
S32750 is a super duplex stainless steel, also known as Grade 2507, prized for its exceptional strength and superior corrosion resistance, especially against pitting, crevice corrosion, and stress corrosion cracking, combining properties of both austenitic and ferritic steels. It features high levels of chromium (24-26%), molybdenum (3-5%), and nitrogen (0.24-0.32%), making it ideal for harsh environments like offshore oil & gas, chemical processing, and marine engineering where high performance is critical.
What is equivalent to 2507 stainless steel?
2507 stainless steel (UNS S32750) is a super duplex alloy, with key equivalents including UNS S32760, DIN 1.4410, ASTM A182 F53, EN 1.4410, and SAF 2507; it's known for high strength and excellent resistance to pitting/crevice corrosion, used where standard grades like 2205 fall short, especially in chloride environments.
2507 Super Duplex Chemical Composition
| Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulpher (S) | Silicon (Si) | Chrome (Cr) | Nickel (Ni) | Nitrogen (N) | Molybdenum (Mo) | Copper (Cu) | |
|---|---|---|---|---|---|---|---|---|---|---|
| Min | 24.0 | 6.0 | 0.24 | 3.0 | ||||||
| Max | 0.030 | 1.20 | 0.035 | 0.020 | 0.80 | 26.0 | 8.0 | 0.32 | 5.0 | 0.50 |
Super Duplex UNS S32750 Mechanical Composition
| Grade | UNS Number | Tensile Min (psi) | Yield Min (psi) | Elongation Min % | Reductions Min % | Hardness BHN |
|---|---|---|---|---|---|---|
| Super Duplex | S32750 | |||||
| Less or Equal To 2" | 116,000 | 80,000 | 15 | * | 310 Max | |
| Greater Than 2" | 110,000 | 75,000 | 15 | * | 310 Max |
Is 2507 super duplex stainless steel magnetic?
Yes, 2507 super duplex stainless steel is magnetic because its microstructure contains both non-magnetic austenitic and magnetic ferritic grains, with the ferritic component making the alloy attracted to magnets, unlike purely austenitic grades (like 304/316) that are non-magnetic.
What is the difference between super duplex 2205 and 2507?
Duplex 2205 has lower chromium, molybdenum, and nitrogen content and a PREN typically ~34–36, making it strong and corrosion-resistant for many industrial uses. Super Duplex 2507 has higher alloying levels with a PREN above 40, offering superior resistance for extreme environments.
Super duplex 2507 stainless steel vs 316
Super duplex 2507 offers significantly higher strength (2-4x yield) and superior pitting/crevice corrosion resistance (due to higher Cr/Mo) compared to 316 stainless steel, making it ideal for harsh, high-chloride environments like offshore oil & gas, while 316 is a good general-purpose grade for moderate conditions like food processing, chemical processing, and marine fittings, but requires careful welding and has lower temperature limits than 316, though it retains toughness at cryogenic temperatures where 2507 struggles.
Super Duplex 2507 Stainless Steel price per kg
Super Duplex 2507 stainless steel price per kg varies significantly by form (plate, bar, pipe), quantity, supplier, and location, generally ranging from around $2 to over $15 per kilogram, often seen as $2-$9/kg for plates and higher for bars, with bulk orders potentially lowering prices to a few dollars/kg or up to $20+/kg for specific items or smaller amounts, so checking with multiple suppliers for quotes is crucial.
Super Duplex 2507 Stainless Steel Supplier - GNEE
Our technical team can assist with cross-standard material matching, mechanical datasheets, and full traceability documents. Whether you need ASTM, ASME, EN, or JIS-compliant materials, we help ensure that the 2507 grade you select meets your project's performance and regulatory requirements.
We offer 2507 super duplex stainless steel in a full range of product forms, including:
2507 super duplex Round bars (ASTM A276 / A479)
2507 super duplex Seamless and welded pipes (ASTM A790 / A928)
2507 super duplex Plates and sheets (ASTM A240)
2507 super duplex Forged fittings and flanges (ASTM A182 F53)
All materials can be supplied with EN 10204 3.1 / 3.2 certificates, and compliant with NACE MR0175, PED, DNV, or ASME standards.
👉 Contact us today to get a quote, request a material certificate, or receive a detailed equivalency table PDF.
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