S32760 (F55)
Data verifiedS32760 (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.
Chemical composition
| Element | Content (%) |
|---|---|
| C | ≤0.030 |
| Si | ≤1.00 |
| Mn | ≤1.00 |
| P | ≤0.030 |
| S | ≤0.010 |
| Cr | 24.00–26.00 |
| Ni | 6.00–8.00 |
| Mo | 3.00–4.00 |
| Cu | 0.50–1.00 |
| W | 0.50–1.00 |
| N | 0.20–0.30 |
Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.
Properties
| Delivery condition | Solution annealed |
| Hardness | ≤310 HB |
| Tensile strength | ≥750 MPa |
| Yield strength | ≥550 MPa |
| Density | 7.80 g/cm³ |
| Magnetic | Yes |
| PREN | ≥40 |
Heat treatment
Solution anneal 1100–1140 °C, water quench. Welding heat input and interpass temperature must be controlled as for all super duplex grades.
Equivalent grades
| Standard | Designation |
|---|---|
| din | 1.4501 |
| aisi | UNS S32760 (F55) |
Compare side by side: S32760 (F55) vs 2507 Super Duplex · S32760 (F55) vs 2205 Duplex
Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.
Applications & Processing
Applications: Subsea and offshore oil & gas, seawater injection, desalination, FGD systems, acid handling in chemical plant.
Processing: As for 2507 super duplex: qualified welding procedures, phase-balance and corrosion testing are standard; the copper content also improves machinability slightly over S32750.
FAQ
- S32760 vs S32750 (2507) — what is the difference?
- S32760 adds 0.5–1.0% tungsten and 0.5–1.0% copper to the same 25Cr super duplex base, improving pitting resistance and acid performance; S32750 is the more widely stocked default.
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Ask for a quotationVisit NasteelSource: ASTM A240 published ranges (UNS S32760) · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.