Super Duplex 2507 Stainless Steel Round Bar (UNS S32750 / S32760)
Super Duplex 2507 Stainless Steel Round Bar is a high-alloy austenitic–ferritic (super duplex) stainless steel engineered for extreme strength and exceptional corrosion resistance. Identified by UNS S32750 (EN 1.4410) and UNS S32760 (EN 1.4501), this grade provides very high resistance to pitting, crevice corrosion, and stress corrosion cracking, especially in chloride-rich and seawater environments.
With nearly double the yield strength of Duplex 2205, Super Duplex 2507 is the preferred choice for offshore, marine, oil & gas, and chemical processing industries.
Key Features
- Extremely high yield and tensile strength
- Outstanding resistance to pitting & crevice corrosion (PREN ≥ 40)
- Excellent stress corrosion cracking resistance
- Superior performance in seawater and acidic environments
- Good weldability with controlled heat input
- Long service life in harsh operating conditions
Equivalent Grades
| Standard | Grade |
|---|---|
| UNS | S32750 / S32760 |
| EN | 1.4410 / 1.4501 |
| DIN | X2CrNiMoN25-7-4 |
| AFNOR | Z2CND25-07AZ |
| NORSOK | M-630 |
Sizes
- Diameter: 6 mm to 500 mm
- Length: 3 m, 6 m, or cut-to-length
- Tolerance: H8 / H9 / H11 or as required
Super Duplex 2507 Stainless Steel Chemical Composition
| Element | Percentage (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 5.0 |
| Nitrogen (N) | 0.24 – 0.32 |
| Manganese (Mn) | ≤ 1.20 |
| Silicon (Si) | ≤ 0.80 |
| Phosphorus (P) | ≤ 0.035 |
| Sulfur (S) | ≤ 0.020 |
(UNS S32750 / S32760) Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 800 – 1000 MPa |
| Yield Strength (0.2%) | ≥ 550 MPa |
| Elongation | ≥ 15% |
| Hardness | ≤ 310 HB |
Super Duplex 2507 Physical Properties
| Property | Value |
|---|---|
| Density | 7.8 g/cm³ |
| Melting Point | 1350 – 1450°C |
| Modulus of Elasticity | 200 GPa |
| Thermal Conductivity | 14 W/m·K |
| Electrical Resistivity | 0.80 µΩ·m |
Types of Super Duplex 2507 Stainless Steel Round Bar
- Hot Rolled Round Bar
- Cold Drawn Round Bar
- Bright Bar
- Centerless Ground Bar
Applications
- Offshore oil & gas platforms
- Subsea pipelines and umbilicals
- Seawater handling systems
- Heat exchangers and pressure vessels
- Chemical and petrochemical equipment
- Marine shafts, pumps, and valves
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