S32760 (F55) vs 2507 Super Duplex
These two grades are listed as equivalents of each other: their chemistry windows overlap and they serve the same applications. They are not always identical — check the differences below before substituting, especially in certified designs.
S32760 (F55)
Stainless Steel
S32760 (sold as Zeron 100 / F55) is a super duplex stainless alloyed with tungsten and copper on top of the 25% chromium super duplex base. The W and Cu additions lift pitting resistance and give useful resistance to sulfuric and other reducing acids.
Standards: DIN 1.4501 · AISI UNS S32760 (F55)
2507 Super Duplex
Stainless Steel
2507 is a super duplex stainless with 25% chromium, 4% molybdenum and high nitrogen, giving a PREN above 40 and outstanding resistance to pitting, crevice corrosion and chloride stress corrosion in seawater and offshore service.
Standards: DIN 1.4410 · AISI UNS S32750 · GB 022Cr25Ni7Mo4N
Chemical composition compared (%)
| Element | S32760 (F55) | 2507 Super Duplex |
|---|---|---|
| C | ≤0.030 | ≤0.030 |
| Si | ≤1.00 | ≤0.80 |
| Mn | ≤1.00 | ≤1.20 |
| P | ≤0.030 | ≤0.035 |
| S | ≤0.010 | ≤0.020 |
| Cr | 24.00–26.00 | 24.00–26.00 |
| Ni | 6.00–8.00 | 6.00–8.00 |
| Mo | 3.00–4.00 | 3.00–5.00 |
| Cu | 0.50–1.00 | ≤0.50 |
| W | 0.50–1.00 | — |
| N | 0.20–0.30 | 0.24–0.32 |
Properties compared
| Property | S32760 (F55) | 2507 Super Duplex |
|---|---|---|
| Delivery condition | Solution annealed | Solution annealed |
| Hardness | ≤310 HB | ≤310 HB |
| Tensile strength | ≥750 MPa | 795–1000 MPa |
| Yield strength | ≥550 MPa | ≥550 MPa |
| Density | 7.80 g/cm³ | 7.80 g/cm³ |
| Magnetic | Yes | Yes |
| PREN | ≥40 | ≥40 |
Sourcing either grade?
Nasteel stocks both families from Shenzhen with EN 10204 3.1 mill certificates by heat number.
Ask for a quotationSee full data sheets: S32760 (F55) · 2507 Super Duplex. Substitution decisions for certified parts stay with the design authority.