Chemical Composition of Super Duplex S32760 Pipes & Fittings
Chemical composition of Super Duplex S32760 pipes and fittings, with focus on tungsten and copper benefits, is listed below:
| Material / Element |
Chromium (Cr) |
Nickel (Ni) |
Molybdenum (Mo) |
Tungsten (W) |
Copper (Cu) |
Nitrogen (N) |
Carbon (C) |
Iron (Fe) |
| S32760 (%) |
24.0-26.0 |
6.0-8.0 |
3.0-4.0 |
0.50-1.00 |
0.50-1.00 |
0.20-0.30 |
0.030 max |
Balance |
Tungsten improves pitting and crevice corrosion resistance in acidic chloride environments. It contributes to PREN when using the modified formula: PREw = %Cr + 3.3(%Mo + 0.5×%W) + 16×%N ≈42-44. Copper provides resistance to sulfuric acid, a critical property S32750 cannot offer. These W+Cu additions are the defining difference between the two super duplex grades. Low carbon (≤0.030%) minimises carbide precipitation during welding.
Mechanical Properties of Super Duplex S32760 Pipes & Fittings
Mechanical characteristics of Super Duplex S32760 pipes and fittings, based on EN 10088-3 and ASTM A790 requirements for solution-annealed condition.
| Material / Property |
Tensile Strength (min) |
Yield Strength 0.2% (min) |
Elongation (min) |
Hardness (max) |
Charpy Impact (min) |
| S32760 |
750 MPa (109 ksi) |
550 MPa (80 ksi) |
25% |
32 HRC (310 HBW) |
45 J at -46°C |
Yield of 550 MPa matches S32750 and is ~2.5x that of 316L (220 MPa). S32760 has 25% elongation, compared to 15% for S32750, which means S32760 is more ductile and tougher. Impact energy of 45 J at -46°C is also higher than S32750’s 27 J minimum. Hardness max 32 HRC per NACE MR0175 for sour service.
Super Duplex S32760 (Zeron 100) Equivalent Grades
Super Duplex S32760, also known as Zeron 100 (UNS S32760), corresponds to several equivalent international material designations and standards.
| Property |
UNS |
Werkstoff Nr. |
EN |
| Designation |
S32760 |
1.4501 |
X2CrNiMoCuWN25-7-4 |
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Types of Super Duplex S32760 Pipes & Fittings
Super Duplex S32760 pipes and fittings are manufactured in multiple types and configurations to meet severe chloride, acid, and sour-service demands.
Industries Using Super Duplex S32760 Pipes & Fittings
Super Duplex S32760 pipes and fittings offer very strong corrosion resistance due to tungsten and copper, in tough chloride, acid, and sour service conditions across many key industries.
How to Order Super Duplex S32760 Pipes & Fittings from Nicorex Alloys
To order Super Duplex S32760 Pipes & Fittings, follow these important instructions:
Specify NACE MR0175 for sour service and NORSOK M-630 for oil and gas projects with extended testing requirements. Confirm the ferrite range on the purchase order.
Frequently Asked Questions