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Super Duplex UNS S32760 Fasteners Supplier in Mumbai - F55 & Zeron 100 Bolts and Nuts
Nicorex Alloys is an ISO 9001 / ISO 14001 certified supplier, importer, and stockist of Super Duplex S32760 fasteners in Mumbai, India. We supply high-integrity components engineered to withstand extreme chloride environments, ensuring structural reliability and superior corrosion resistance for critical industrial infrastructure.
Components such as tungsten and copper are both part of the super duplex stainless steel designated by the UNS S32760 chemical composition. It is designed to perform better under high-pressure conditions, especially in an environment containing acid chlorides and strong mineral acids. The deliberate addition of tungsten (0.50-1.00%) and copper (0.50-1.00%) gives UNS S32760 bolting measurable advantages in combined acid-chloride environments. Tungsten partitions into the ferrite phase and raises the modified PREw to 40-45, pushing CPT to 70-80°C in ferric chloride testing. Copper provides specific resistance to reducing acids (dilute H₂SO₄, H₃PO₄). That’s why UNS S32760 is commonly specified in North Sea offshore projects and referenced in NORSOK MDS D55.”
This material meets ASTM A182 F55 for forgings and S32760 for bolting. It features a 550 MPa yield strength and a 1.4501 European grade designation. The F55 grade specifies both minimum and maximum tensile strength, an unusual A182 feature that prioritises toughness and ductility for fatigue-loaded subsea bolting. We offer F55 hex bolts, studs, and Zeron 100 fasteners ranging from M6 to M100. These products meet NACE MR0175 standards with a 35-65% ferrite content.
Super Duplex Steel F55 Fasteners Specifications
| Standard | ASTM A182 F55 / ASME SA-182 F55; ASTM A479 / ASME SA-479 |
|---|---|
| Forms | Bolts, Nuts, Screws, Washers, Studs, Threaded Rods, Hex Bolts, Socket Head Cap Screws, Hex Nuts, Lock Nuts, Stud Bolts |
| Size | M6 – M100 (Metric); 1/4″ – 4″ (Imperial) |
| Length | 3 mm – 200 mm; Custom lengths available |
| Diameter | M6 – M100 (Metric); 1/4″ – 4″ (Imperial) |
| Thread Types | UNC, UNF, Metric Coarse, Metric Fine, BSW, BSF |
| Surface Finishes | Bright Finish, Pickled, Passivated, Hot-Dip Galvanized, Electropolished |
| Available Conditions | Solution Annealed |
Chemical Composition of Super Duplex UNS S32760 Fasteners
| Element | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Nitrogen (N) | Copper (Cu) | Tungsten (W) | Carbon (C) | Sulfur (S) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|
| Composition (%) | 24.0-26.0 | 6.0-8.0 | 3.0-4.0 | 0.20-0.30 | 0.50-1.00 | 0.50-1.00 | 0.030 max | 0.010 max | Balance |
Mechanical Properties of Super Duplex Stainless Steel S32760 Fasteners
| Property | Tensile Strength | Yield 0.2% (min) | Elongation (min) | Reduction of Area (min) | Hardness | Charpy V-Notch (−50°C) |
|---|---|---|---|---|---|---|
| Value | 750-895 MPa (109-130 ksi) | 550 MPa (80 ksi) | 25% | 45% | Not specified per A182 (typical ~28 HRC) | 45/35 J (avg/min) |
For bolting procurement: ASTM A1082 S32760 specifies tensile 750 MPa min (no max), yield 80 ksi min, elongation 25%, hardness 30 HRC / 290 HBN max. The A182 tensile maximum (895 MPa) applies to forgings, not A1082 bolting.
Zeron 100 Fasteners Equivalent Grades
| Standard System | UNS | Werkstoff Number | DIN/EN | JIS | GOST | AFNOR | ISO |
|---|---|---|---|---|---|---|---|
| Equivalent Grade | S32760 | 1.4501 | X2CrNiMoCuWN25-7-4 | Not Specified | Not Specified | Z3CND25-06AZCu | Not Specified |
Get Super Duplex S32760 Fasteners at Competitive Prices
Types of Super Duplex Steel UNS S32760 Fasteners Available
S32760 Hex Bolts
F55 Stud Bolts
Zeron 100 Socket Head Cap Screws
S32760 Hex Nuts
F55 Lock Nuts
S32760 Flat Washers
UNS S32760 Threaded Rods
S32760 U-Bolts
F55 Set Screws
Zeron 100 Eye Bolts
Surface Finish and Coating Options for Super Duplex Steel S32760 Fasteners
Industries and Applications for S32760 / F55 Fasteners
- H₂SO₄ autoclave bolting, copper smelter gas handling fasteners, and heap leach circuit equipment. This design prioritises durability over peak strength.
- Phosphoric acid reactor bolting, H₂SO₄ concentrator flanges, and ammonium sulphate crystalliser equipment.
- Mixed acid environments, chlorinated organic solvent equipment, and bleach plant bolting.
- Wet FGD scrubber bolting in combined SO₂/SO₃ + Cl⁻ service.
- Hot seawater >65°C, ballast water treatment, and firewater deluge system fasteners.
How to Order Super Duplex Steel F55 (UNS S32760) Fasteners
- Grade - S32760 / A182 F55
- Specification - A182 F55, A479 S32760, or A1082
- NORSOK MDS - D55 if offshore
- NACE Compliance - MR0103 ≤28 HRC
- ASTM G48 CPT / A923 - ASTM G48 CPT / A923
- Ferrite Content - 35-65%
- Impact Testing - SQA datasheet: 45/35 J at -50°C
- Size / Thread / Length / Quantity / Finish - Size/Thread/ Length/Qty/Finish
- Certification - EN 10204 3.1/3.2 + PMI
Frequently Asked Questions
What is the Price of Super Duplex S32760 / F55 Fasteners per Kg in India?
Prices range from ₹1,500-₹3,500/kg, approximately 10-20% more than S32750 (F53) due to tungsten and copper additions. The higher cost is justified for acid-chloride combined environments and North Sea specifications that mandate Zeron 100.
What is the Key Difference Between S32760 (F55) and S32750 (F53)?
Tungsten (0.50-1.00%) and copper (0.50-1.00%) are present in S32760 but not in S32750. Tungsten raises pitting/crevice resistance in acidic chlorides. Copper handles reducing acids. S32760 also has a tighter S limit (0.010% vs 0.020%), higher elongation (25% vs 15%), lower minimum tensile (750 vs 800 MPa), and a specified tensile maximum (895 MPa). This design puts robustness ahead of peak strength.