Description (English)
Shanghai Vertex Alloy Co., Ltd (Vertex Alloy) supplies 2507 super duplex stainless steel tube and pipe (UNS S32750 / EN 1.4410 X2CrNiMoN25-7-4 / forging grade F53; Chinese GB equivalent 022Cr25Ni7Mo4N, S25073). With ~25% Cr, 7% Ni, 4% Mo and 0.27% N in a balanced austenitic–ferritic structure, 2507 delivers PREN ≥41, critical pitting temperature above 50°C, critical crevice temperature ≥35°C, virtual immunity to chloride stress-corrosion cracking, and a yield strength ≥550 MPa — nearly double that of 316L — enabling thinner-wall, lighter high-pressure piping with good toughness down to −50°C. Seamless tube/pipe 6–219 mm OD and welded pipe up to 813 mm OD are supplied to ASTM A789/A790 (ASME SA789/SA790) and EN 10216-5/10217-7, solution annealed (1040–1120°C, water quench), NACE MR0175/ISO 15156-3 sour-service compliant, with EN 10204 3.1 certificates. Typical applications include offshore seawater and firewater systems, subsea flowlines and risers, SWRO desalination high-pressure piping, and chloride chemical-process heat exchangers. Contact us for the latest stock and pricing.
Size Range
- 6–219 mm (seamless); up to 813 mm (welded)
Grade Specification
| System | Value |
|---|---|
| UNS | S32750 |
| Common name | Alloy 2507 / SAF 2507 (Outokumpu-Sandvik trade designation) |
| ASTM / ASME | A789 / A790 tube & pipe; A182 F53 forgings; A240 plate; A276/A479 bar |
| EN / Werkstoff | 1.4410 / X2CrNiMoN25-7-4 |
| 🇯🇵 JIS | SUS 32750 |
Chemical Composition
| Element | Value |
|---|---|
| Cr | 24.0–26.0 |
| Ni | 6.0–8.0 |
| Mo | 3.0–5.0 |
| N | 0.24–0.32 |
| C | ≤ 0.030 |
| Mn | ≤ 1.20 |
| Si | ≤ 0.80 |
| P | ≤ 0.035 |
| S | ≤ 0.020 |
| Cu | ≤ 0.50 |
| Fe | Balance |
Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | ≥ 800 MPa (116 ksi) |
| 0.2% Yield Strength | ≥ 550 MPa (80 ksi) |
| Elongation | ≥ 15% (ASTM min); typically ≥ 25% |
| Hardness | ≤ 310 HBW / ≤ 32 HRC |
| Impact Toughness (RT) | ≥ 80 J |
| Impact Toughness (−46°C) | 45 J avg / 35 J min |
| PREN | ≥ 41 (typ. 41–43) |
| Critical Pitting Temperature | > 50°C (ASTM G48) |
| Critical Crevice Temperature | ≥ 35°C (ASTM G48) |
Physical Properties
| Property | Unit | Value |
|---|---|---|
| Density | - | 7.81 g/cm³ |
Applications
- Offshore Oil & Gas
- Seawater Systems
- Desalination
- Chemical & Petrochemical
- Pollution Control
- Pulp & Paper / Geothermal
- Marine & Shipbuilding