Super Duplex 32760 (Zeron 100) · UNS S32760 · W. Nr. 1.4501
Super Duplex 32760 (Zeron 100) (S32760): composition, properties, fittings and flanges
Super Duplex 32760 (Zeron 100) (S32760, W. Nr. 1.4501) is Tungsten-bearing super duplex stainless steel. Super Duplex 32760 (Zeron 100) is specified at Chromium 24.0 - 26.0, Nickel 6.00 - 8.00, Molybdenum 3.00 - 4.00. 32760 adds tungsten and copper to the 25 % chromium super duplex base, pushing PREN near 40 and giving the best…
- UNS
- S32760
- W. Nr.
- 1.4501
- Density
- 7.81 g/cm³ (0.282 lb/in³)
- Key strength
- 750 MPa / 109 ksi
Identification and standards
| Short form | Super Duplex 32760 (Zeron 100) · UNS S32760 · W. Nr. 1.4501 |
|---|---|
| Classification | Tungsten-bearing super duplex stainless steel |
| UNS | S32760 |
| Werkstoff number | 1.4501 |
| Material family | Stainless Steel |
Chemical composition
| Element | Composition (wt %) | Why it is there |
|---|---|---|
| Chromium (Cr) | 24.0 - 26.0 | Pitting and oxidation resistance |
| Nickel (Ni) | 6.00 - 8.00 | Austenite balance |
| Molybdenum (Mo) | 3.00 - 4.00 | Pitting and crevice resistance |
| Tungsten (W) | 0.50 - 1.00 | Pitting resistance |
| Nitrogen (N) | 0.20 - 0.30 | Strength and pitting resistance |
| Copper (Cu) | 0.50 - 1.00 | Reducing acid resistance |
| Carbon (C) | 0.030 max | Sensitisation control |
| Iron (Fe) | Balance | Matrix |
Note Single figures are maximum limits unless shown as a range. Always confirm against the heat-specific EN 10204 3.1 certificate supplied with your order.
Mechanical properties
| Tensile strength, min (annealed) | 750 MPa / 109 ksi |
|---|---|
| 0.2 % yield strength, min | 550 MPa / 80 ksi |
| Elongation in 2 in, min | 25 % |
| Typical hardness, annealed | 250 - 290 HB |
| PREN, typical | About 40 |
Warning Values depend on product form, section thickness and heat treatment. Larger sections generally achieve lower strength than thin product; always design against the applicable code allowable stress rather than these figures.
Physical properties
| Density | 7.81 g/cm³ (0.282 lb/in³) |
|---|---|
| Melting range | 1390 - 1440 °C (2535 - 2625 °F) |
| Modulus of elasticity | 200 GPa (29.0 x 10⁶ psi) |
| Thermal conductivity at 20 °C | 14.0 W/m·K |
| Mean coefficient of thermal expansion, 20-100 °C | 12.8 µm/m·°C |
| Specific heat capacity | 480 J/kg·K |
Specifications by product form
| Forgings & flanges | ASTM A182 F55 · ASME SA-182 (UNS S32760) |
|---|---|
| Butt weld fittings | ASTM A815 UNS S32760 |
| Seamless pipe & tube | ASTM A790 / A789 UNS S32760 |
| Plate / sheet / strip | ASTM A240 UNS S32760 |
| Bar / rod | ASTM A276 / A479 |
| Welding consumables | ER2594 |
| UNS / EN / China | UNS S32760 · W. Nr. 1.4501 · NACE MR0175 listed |
Product forms available
Hangbo supplies this grade in the following forms. Sizes outside the listed range can often be produced to order.
- Forged flanges blanks and finished flanges to ASME B16.5, B16.47 Series A/B and B16.36
- Butt weld elbows, tees, reducers, caps and stub ends to ASME B16.9 and MSS SP-43
- Seamless pipe and tube to the applicable ASTM / ASME pipe specification
- Forged rings, discs and hubs machined to your drawing
Typical applications
- Subsea manifolds, flowlines and umbilicals
- Seawater injection, cooling and fire water systems
- Sour gas production and process piping
- Desalination brine heaters and recirculation lines
Welding, forming and machining
- Welding
- Weld with ER2594 super duplex filler. Strict control of heat input and interpass temperature is essential: sigma and chi phase form quickly between 600 and 900 °C.
- Heat treatment
- Solution anneal at 1080 - 1120 °C and water quench.
- Hot and cold forming
- Hot work in the range stated by the mill for this grade, then re-solution or re-age before final machining so that the delivered condition matches the certificate.
- Machining
- Machine with sharp carbide or high-speed steel tooling, positive rake, constant feed and ample coolant. Never dwell - the surface work-hardens quickly.
Buy Super Duplex 32760 (Zeron 100) from Hangbo
Material is supplied with full heat-number traceability, solution annealing or ageing performed under calibrated furnace control, and an EN 10204 3.1 certificate covering chemical analysis, mechanical properties, heat treatment records and the agreed NDT scope. Positive material identification and third party inspection and test reports from SGS are available for critical service.