What is the equivalent grade of uns S32750?
UNS S32750 (often branded as SAF 2507) is a super duplex stainless steel frequently equivalent to EN/DIN 1.4410 and X2CrNiMoN25-7-4. It is widely used for high-strength, corrosion-resistant applications in, for example, ASTM A789 seamless tubes, with common designations including F53 (ASTM A182) and CE3Mn (ASTM A890) for castings.
What is material grade 2507?
2507 material grade (commonly known as Super Duplex Stainless Steel 2507 or UNS S32750) is a high-performance austenitic-ferritic stainless steel with excellent corrosion resistance and high strength. Containing 25% chromium, 4% molybdenum, and 7% nickel, it can be processed into a variety of practical product forms, including plates, coils, pipes, bars, and wires.
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.
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 |
Mechanical Properties (Typical)
| Type | Yield strength Rp0.2 (MPa) | Tensile strength Rm (MPa) | Elongation (%) | Hardness [HB] | Impact, Charpy-V, -46ºC [J] |
|---|---|---|---|---|---|
| BAR | ≥ 550 | ≥ 750 | ≥ 25 | ≤ 300 | ≥ 65 |
| PLATE CR (COIL) | ≥ 550 | 750 – 1000 | ≥ 25 | ≤ 310 | ≥ 45 |
| PLATE HR (COIL) | ≥ 550 | 750 – 1000 | ≥ 25 | ≤ 310 | ≥ 45 |
| PLATE (QUARTO) | ≥ 550 | 750 – 930 | ≥ 25 | ≤ 310 | ≥ 45 |
2507 Stainless Steel Heat Treatment
2507 Super Duplex Stainless Steel requires solution annealing at 1020 - 1100°C (1868 - 2012°F) followed by rapid water quenching to ensure a 50/50 austenitic-ferritic microstructure. This process dissolves harmful intermetallic compound phases and maximizes corrosion resistance. Proper quenching is crucial to avoid brittleness.
What is the difference between 2205 and 2507?
The primary difference between 2205 (Duplex) and 2507 (Super Duplex) is that 2507 has a higher alloy content (more Chromium, Molybdenum, and Nickel), providing significantly higher corrosion resistance and mechanical strength. While 2205 is a versatile workhorse for general applications, 2507 is designed for extreme, high-chloride, and seawater environments.
What is the difference between S32760 and 2507?
S32760 (also known as F55 or UR52N+) and 2507 (UNS S32750) are both super duplex stainless steels. S32760 contains tungsten (approximately 0.75%) and a higher molybdenum content (around 3.5%), which enhance its corrosion resistance in acidic and chloride-containing environments. In contrast, 2507 contains higher chromium (about 25%) and nitrogen levels, providing superior strength and pitting corrosion resistance in seawater applications. Due to the addition of tungsten and more demanding processing requirements, S32760 is generally more expensive than 2507.
What is 2507 stainless steel used for?
2507 super duplex stainless steel is primarily used in harsh, highly corrosive environments requiring exceptional strength, particularly in high-chloride, marine, and oil and gas applications. It is a premier choice for desalination plants, chemical processing, and subsea pipelines due to its superior pitting and crevice corrosion resistance.
UNS S32750 stainless steel pipe supplier
As a leading global supplier of Super Duplex stainless steel, GNEE maintains a strategic inventory exceeding 1,500 tons. Our stock complies with ASTM A790, A789, and A182 standards, as well as NACE MR0175/ISO 15156 (a standard critical for applications in sour gas environments). Covering all major wall thickness schedules (Sch 10S, 40S, and 80S), we ensure that materials for urgent projects can be shipped within 7 to 10 days.
Available Product Forms of UNS S32750 (Super Duplex 2507)
| Product Form | Manufacturing Type | Standard Specification | Size Range (O.D.) | Wall Thickness / Schedule |
| Seamless Pipe | Hot Rolled / Cold Drawn | ASTM A790, ASME SA790 | 1/2" – 24" (DN15 – DN600) | SCH 10S, 40S, 80S, XS, XXS |
| Welded Pipe | EFW, ERW, Longitudinal | ASTM A790, ASME SA790 | 6" – 60" (DN150 – DN1500) | SCH 5S, 10S, 20, 40S, 80S |
| Seamless Tube | Cold Rolled / Bright Annealed | ASTM A789, ASME SA789 | 6.0mm – 219.1mm | 0.5mm – 20mm |
| Welded Tube | Continuous Welded | ASTM A928, ASME SA928 | 12.7mm – 323.8mm | 1.0mm – 12.7mm |
In addition to supplying UNS S32750 seamless and welded pipes, we provide a comprehensive range of matching S32750 fittings including flanges, elbows, tees, and custom-engineered forged pipe fittings. Furthermore, we offer value-added services such as cut-to-length processing, precision threading, and U-bending for heat exchanger applications.
If you have project requirements for UNS S32750 stainless steel pipes, you are welcome to place an order.Mail:es@gescosteel.com