Global Designations & Equivalents
2.4665 is the European Werkstoff-Nummer. The table below shows all equivalent designations across international standards systems.
| Standards System | Designation | Notes |
|---|---|---|
| W.Nr. / EN (Europe) | 2.4665 / NiCr21Fe18Mo9 | Primary European designation — EN 10095, DIN 17744 |
| DIN (Germany) | NiCr21Fe18Mo9 | DIN 17744; identical composition range |
| UNS (USA / ASTM) | N06985 | Referenced in ASTM B622, B626 |
| Trade Names | Alloy G-3, Hastelloy® G-3 | Registered trade name of Haynes International, Inc. |
| ISO | NiCr22Fe20Mo9 | ISO equivalent; minor nomenclature rounding only |
Key Material Properties
Forged 2.4665 components consistently outperform cast equivalents in tensile strength, fatigue resistance, and ductility due to grain refinement. For critical high-temperature or pressure-bearing applications, always specify forged — not cast — NiCr21Fe18Mo9 components.
Available Product Forms & Dimensions
All products are manufactured to customer drawings and technical requirements. Custom sizes and shapes available on request.
Industrial Applications
Standards & Certifications
| Standard | Scope | Our Position |
|---|---|---|
| EN 10095 | Heat-resistant steels and nickel alloys | Primary material standard — composition and minimum properties |
| DIN 17744 | Nickel alloy semi-finished products | German equivalent to EN 10095 |
| ASTM B622 | Seamless pipe/tube — UNS N06985 | US specification for tubular product forms |
| EN 10204 3.1 | Mill Test Certificate — manufacturer-certified | Supplied as standard with all forgings |
| EN 10204 3.2 | MTC endorsed by independent inspector | Available on request (SGS, BV, TÜV) |
| ISO 9001:2015 | Quality Management System | Certified — our QMS certification |
| API 6A | Wellhead and Christmas tree equipment | Can produce to API 6A material requirements on request |
| NACE MR0175 | Materials for H₂S sour service | Can produce to NACE MR0175 material requirements on request |
| ASME BPVC VIII | Pressure vessel code | Can produce to ASME material requirements on request |
Frequently Asked Questions
What is 2.4665 (NiCr21Fe18Mo9) alloy?
2.4665 (NiCr21Fe18Mo9) is a solid-solution strengthened nickel-chromium-iron-molybdenum heat-resistant alloy per EN 10095 and DIN 17744, equivalent to UNS N06985. It offers a maximum continuous service temperature of 1150°C and outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking.
What product forms are available?
Forged bars and rods (diameter up to 2000 mm, length up to 15 m), seamless rolled rings (OD up to 6000 mm), forged discs and blanks (OD up to 3000 mm), hollow and tubular forgings, and fully custom-shaped components. Single piece weight: 30 kg to 30,000 kg.
What certifications and documents are provided?
All forgings are supplied with EN 10204 3.1 Mill Test Certificates as standard. EN 10204 3.2 certificates (witnessed by SGS, BV, or TÜV) are available on request. We hold ISO 9001:2015 certification. Parts can be produced to API 6A, NACE MR0175, and ASME requirements on request.
What is the lead time?
Standard bars and rings from stocked billets: 4–6 weeks including heat treatment and inspection. Large custom forgings produced from scratch (including melting): 10–16 weeks. Contact us for a free quote within 24 hours.
Can forgings be produced to NACE MR0175?
Yes. 2.4665 (NiCr21Fe18Mo9) meets the material composition requirements of NACE MR0175 / ISO 15156 when properly solution-annealed at 1100–1150°C. We can produce forgings to these requirements and supply supporting documentation on request.
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