UNS N06617 (Inconel 617)
Generic Name & Other Names
Inconel 617, Alloy 617, Nickel Alloy 617,W.Nr. 2.4663, NiCr21Co12Mo (DIN/EN)
Product Overview
UNS N06617 (widely known as Inconel 617) is a solid-solution strengthened nickel-chromium-cobalt-molybdenum alloy engineered for ultra-high temperature structural applications.
The precise synergy of cobalt, molybdenum, and chromium yields high creep strength above 870°C (1600°F) paired with oxidation resistance. It is one of the few materials approved for high-temperature pressure vessel construction under ASME Code cases.
Key Highlights
✅ Exceptional Creep-Rupture Strength Above 950°C: Cobalt (12.5%) and molybdenum (9%) matrix strengthening delivers long-term load-carrying capability at extreme temperatures.
✅ High-Temperature Corrosion Resistance: Exceptional stability against cyclic oxidation, carburization, and high-temperature green-rot degradation up to 1100°C (2000°F).
✅ Excellent Weldability: Joining can be executed using conventional TIG/MIG processes with minimal risk of hot cracking or embrittlement.
✅ Thermal Fatigue Resistance: Outstanding structural resistance to frequent heating and cooling cycles without thermal cracking.
✅ Global Project Supply by BELNADE: Seamless pipes, heavy plates, and welding consumables for power generation projects.
Chemical Composition & Physical Properties
1. Chemical Composition (Weight %)
Element | Ni | Cr | Co | Mo | Al | C | Fe | Ti | Si | Mn |
Min (%) | Bal. | 20.0 | 10.0 | 8.0 | 0.8 | 0.05 | — | — | — | — |
Max (%) | (~44.5) | 24.0 | 15.0 | 10.0 | 1.5 | 0.15 | 3.0 | 0.6 | 1.0 | 1.0 |
(Note: Maximum limits for Copper Cu ≤ 0.5%, Sulfur S ≤ 0.015%, and Boron B ≤ 0.006% apply per ASTM specifications.)
2. Physical & Mechanical Properties
Parameter | Value / Standard (Solution Annealed State) |
Density | 8.36 g/cm³ (0.302 lb/in³) |
Melting Range | 1330°C – 1380°C (2425°F – 2515°F) |
Tensile Strength (Rm) | ≥ 620 MPa (90 ksi) |
Yield Strength (0.2%, Rp0.2) | ≥ 240 MPa (35 ksi) |
Elongation (A5) | ≥ 35% |
Available Forms & Specifications
BELNADE offers UNS N06617 in certified mill configurations:
Heavy Plates & Cut Sheets: ASTM B168; Thickness from 3mm to 50mm.
Seamless Pipes & Tubes: ASTM B167 / B546; High-temperature pressure piping and steam tubing.
Forged Bars & Discs: ASTM B166; Diameter 20mm to 300mm.
Filler Wire: ERNiCrCoMo-1 welding wire for matching joints.
Typical Application Scenarios
Ultra-Supercritical (USC) Power Plants: Boiler reheater tubing, high-temperature steam headers, and main steam pipes operating above 700°C.
Gas Turbines: Combustion cans, transition ducts, flame holders, and turbine shrouds.
High-Temperature Gas-Cooled Reactors (HTGR): Intermediate heat exchangers (IHX) and helium gas piping.
Petrochemical Processing: Catalyst grid supports and ethylene dichloride pyrolysis tubing.
Quality Assurance & Verification
BELNADE enforces high quality controls for UNS N06617 supply:
Mill Certification to EN 10204 3.1 / 3.2
High-Temperature Creep Testing Validation Data
Ultrasonic & Radiographic NDT Inspections
Full Chemical Verification via OES
Supplier Profile: BELNADE
BELNADE is a global stockist and provider of high-temperature alloys for power, aerospace, and petrochemical industries.
Get in Touch with BELNADE for Quotes and Technical Inquiries
📧 Email: [email protected]
🌐 Website: www.belnade-material.com
💬 Mobile/ WhatsApp: +86 183 6997 5713