Super Duplex Steel Alloy 2507 & F55 Fasteners Overview
Zeon Exports supplies Super Duplex Steel Alloy 2507 & F55 (UNS S32760, Zeron 100) fasteners – bolts, nuts and studs – with added copper and tungsten for outstanding resistance to sulphide-stress and sour-gas corrosion in offshore bolted joints.
Super Duplex Steel Alloy 2507 & F55 Fasteners (Zeron 100) secure bolted connections in the most severe chloride and sour-gas process piping and equipment used offshore and subsea. Its 25% chromium, 7% nickel, 3.6% molybdenum composition with added copper and tungsten gives outstanding resistance to sulphide-stress corrosion cracking, making it a preferred choice wherever standard duplex bolting risks sour-gas cracking.
- PREN ≥40 with added tungsten for extra sour-service resistance
- Yield ≥550 MPa, elongation ≥25% for strength and ductility
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Super Duplex Steel Alloy 2507 & F55 Fasteners
Super Duplex Steel Alloy 2507 & F55 Fasteners are produced to internationally recognized bolting specifications.
| Field | Detail |
|---|---|
| Material/Grade | Super Duplex Steel Alloy 2507 & F55 (Zeron 100) |
| UNS | S32760 |
| Werkstoff Number | 1.4501 |
| Standards | ASTM A276, ASTM A479 |
| Form | Bolts, Nuts, Studs |
| Finish | Passivated |
| Heat Treatment | Solution Annealed, water quenched |
| Certification | EN 10204 3.1 |
Equivalent Grades of Alloy 2507 & F55
Alloy 2507/F55 (Zeron 100) is recognized under several international designations below.
| UNS | Werkstoff Number | EN Steel Name | Common Trade Name | ASTM/ASME Standard |
|---|---|---|---|---|
| S32760 | 1.4501 | X2CrNiMoCuWN25-7-4 | Zeron 100 | ASTM A276/A479 |
Chemical Composition of Alloy 2507 & F55
Composition per ASTM A276/A479 for UNS S32760; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 24.0 – 26.0 |
| Nickel (Ni) | 6.0 – 8.0 |
| Molybdenum (Mo) | 3.0 – 4.0 |
| Nitrogen (N) | 0.20 – 0.30 |
| Copper (Cu) | 0.50 – 1.00 |
| Tungsten (W) | 0.05 – 0.30 |
| Carbon (C), max | 0.030 |
| Manganese (Mn), max | 1.00 |
| Silicon (Si), max | 1.00 |
| Phosphorus (P), max | 0.030 |
| Sulphur (S), max | 0.010 |
| Iron (Fe) | Balance |
Physical Properties of Super Duplex Steel Alloy 2507 & F55
Physical properties for Zeron 100, confirmed against manufacturer data.
| Property | Value |
|---|---|
| Density | 7.84 g/cm3 |
| Melting Range | Confirm against applicable datasheet |
| Magnetic Behaviour | Magnetic (ferrite phase present) |
Mechanical Properties of Super Duplex Steel Alloy 2507 & F55 Fasteners
Minimum mechanical properties per ASTM A276/A479 for UNS S32760.
| Property | Minimum Value |
|---|---|
| Tensile Strength | 750 MPa |
| Yield Strength (0.2% offset) | 550 MPa |
| Elongation | 25% |
| Hardness | 270 HB max |
| Condition | Solution Annealed |
Corrosion Resistance of Super Duplex Steel Alloy 2507 & F55
- With a PREN of 40 or higher, Super Duplex Steel Alloy 2507 & F55 Fasteners significantly outperform standard duplex 2205 in aggressive chloride and sour media.
- Pitting resistance: excellent resistance to chloride-induced pitting in seawater and brine.
- Crevice resistance: strong performance under bolt heads, nuts and flange faces.
- Sulphide-SCC resistance: added copper and tungsten give outstanding resistance to sulphide-stress cracking in sour-gas environments.
Heat Resistance of Super Duplex Steel Alloy 2507 & F55
Alloy 2507 & F55 fasteners are generally not recommended for extended exposure above roughly 300°C (572°F), as this can substantially reduce toughness. Always confirm exact service limits against the governing standard and application before specifying.
Key Properties of Super Duplex Steel Alloy 2507 & F55 Fasteners
Beyond corrosion and heat performance, Zeron 100 fasteners offer these additional properties.
- Very high strength combined with good ductility (25% elongation)
- Good weldability with matching filler metal
- Outstanding sour-gas cracking resistance versus standard super duplex
- Good impact toughness maintained into cold service temperatures
Benefits of Super Duplex Steel Alloy 2507 & F55 Fasteners
Choosing Zeron 100 fasteners from Zeon Exports delivers measurable advantages for your project.
- Best-in-class resistance to sulphide-stress cracking in sour service
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple sizes, threads and finishes to match exact project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
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Request a Quote for Super Duplex Steel Alloy 2507 & F55 Fasteners
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Call: +91 98205 33105
Email: info@zeonexports.com
Website: www.zeonexports.com
Address: A-7/9, Saboo Building, Ardeshir Dady Cross Lane, Cawasji Patel Tank Road, Mumbai – 400004
Frequently Asked Questions About Super Duplex Steel Alloy 2507 & F55 Fasteners
Common questions about Super Duplex Steel Alloy 2507 & F55 Fasteners, answered below.
Q1: What is Super Duplex Steel Alloy 2507 & F55 (Zeron 100)?
Ans. Zeron 100 (UNS S32760) is a super duplex stainless steel with added copper and tungsten, giving a PREN of 40 or higher.
Q2: Which fastener types are available in Zeron 100?
Ans. We supply bolts, nuts and studs to ASTM A276/A479 across standard thread sizes and lengths.
Q3: What standards do Zeron 100 fasteners meet?
Ans. Fasteners are manufactured to ASTM A276/A479, certified to EN 10204 3.1 mill test certificates.
Q4: How does Zeron 100 differ from Alloy 2507?
Ans. Zeron 100 adds copper and tungsten to a similar base composition, improving resistance to sulphide-stress cracking in sour-gas service.
Q5: What is the maximum service temperature?
Ans. Extended exposure above roughly 300°C (572°F) is not recommended, as it can substantially reduce toughness.
Q6: Is Zeron 100 magnetic?
Ans. Yes, like other duplex grades, Zeron 100 is magnetic due to its ferrite phase content.
Q7: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q8: Does Zeon Exports supply custom sizes?
Ans. Yes, fasteners are available in custom thread sizes and lengths on request for bulk industrial orders.
