Super Duplex Steel Alloy 2507 & F55 Round Bar Overview
Super Duplex Steel Alloy 2507 & F55 Round Bar (Zeron 100) is machined into shafts, subsea components and fasteners for the most severe chloride and sour-gas service. 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 for offshore oil & gas equipment.
Quick Specifications of Super Duplex Steel Alloy 2507 & F55 Round Bar
Super Duplex Steel Alloy 2507 & F55 Round Bar is produced to internationally recognized bar specifications.
| Field | Detail |
|---|---|
| Material/Grade | Super Duplex Steel Alloy 2507 & F55 (Zeron 100) |
| UNS | S32760 |
| Werkstoff Number | 1.4501 |
| Standards | ASTM A276, A479, A182 Gr. F55 |
| Form | Round Bar |
| Finish | Hot rolled, turned, ground (as specified) |
| 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; A182 Gr. F55 (forgings) |
Chemical Composition of Alloy 2507 & F55
Composition per ASTM A240/A276 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 Round Bar
Minimum mechanical properties per ASTM A240/A276 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 Round Bar significantly outperforms 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 at shrink-fit and bolted joints.
- 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 round bar is 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 Round Bar
Beyond corrosion and heat performance, Zeron 100 round bar offers 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 Round Bar
Choosing Zeron 100 round bar 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 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 Round Bar
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Frequently Asked Questions About Super Duplex Steel Alloy 2507 & F55 Round Bar
Common questions about Super Duplex Steel Alloy 2507 & F55 Round Bar, 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: What standards apply to Zeron 100 round bar?
Ans. Round bar is manufactured to ASTM A276, certified to EN 10204 3.1 mill test certificates.
Q3: 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.
Q4: What is the maximum service temperature?
Ans. Extended exposure above roughly 300°C (572°F) is not recommended, as it can substantially reduce toughness.
Q5: Is Zeron 100 magnetic?
Ans. Yes, like other duplex grades, Zeron 100 is magnetic due to its ferrite phase content.
Q6: Is Zeron 100 suitable for sour-gas service?
Ans. Yes, Zeron 100 has outstanding resistance to sulphide-stress corrosion cracking, making it well suited to sour-gas environments.
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, round bars are available cut-to-size and in custom dimensions on request for bulk industrial orders.
