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Inconel 617 (UNS N06617 / W.Nr. 2.4663) is a nickel-chromium-cobalt-molybdenum superalloy engineered for extreme thermal environments, retaining high mechanical strength and oxidation resistance up to 1100°C–1200°C. For critical components in aerospace, gas turbines, and industrial furnaces, the integrity of forged or cast shapes is paramount. Shanghai COCESS Special Alloys Co., Ltd serves as a reliable supplier of custom Inconel 617 forgings and related components, ensuring precise metallurgical control and compliance with stringent international standards.
Alloy 617 Core Data for High-Temp Forgings
The suitability of Inconel 617 for custom forgings stems from its solid-solution strengthening and stable chemistry, which withstand long-term creep and oxidation.
Chemical Composition (%): Ni Balance (≥44.5), Cr 20.0–24.0, Co 10.0–15.0 (key for high-temp stability), Mo 8.0–10.0, Al 0.8–1.5 (aids oxide adhesion), C 0.05–0.15, Fe ≤3.0.
Mechanical Retention (Typical Solution Annealed): Room Temp Tensile ≥ 690 MPa, Yield ≥ 280 MPa, Elongation ≥ 30%. At 1000°C, it retains a tensile strength of approx. 300–400 MPa with excellent creep-rupture life (e.g., 1000-hour rupture strength ~16–45 MPa depending on temperature between 980–1095°C).
Physical Properties: Density 8.36 g/cm³; Melting Range 1330–1380°C. The alloy maintains austenitic stability without harmful phase precipitation (like sigma) during long exposures at 900–1100°C.
Custom Forging Capabilities & Standards
Shanghai COCESS Special Alloys Co., Ltd specializes in producing Inconel 617 forgings that meet exact blueprint specifications, utilizing controlled thermomechanical processing:
Standards Compliance: Manufactured in accordance with ASTM B564 / ASME SB-564 and AMS 5887 for forgings, ensuring chemical and mechanical traceability.
Forging Types & Shapes: We supply Open-Die Forgings (blocks, shafts, step shafts up to large diameters), Closed-Die Forgings (complex geometries like turbine disc pre-forms), and Rolled Rings (for casings, flanges). Typical diameter/width capabilities range from small precision sizes up to Ø500mm–1000mm+ (subject to drawing).
Processing: Forging is performed in the temperature range of 1175°C–1205°C to refine grain structure, followed by a solution anneal (approx. 1150°C–1200°C, water quench or rapid air cool) to dissolve carbides and optimize high-temp performance. Ultrasonic Testing (UT) per ASTM A388 can be arranged.
Considerations on Castings (Investment/Sand)
While Inconel 617 is predominantly utilized in wrought/forged forms due to the need for high creep strength (forgings offer superior directional grain flow vs. castings), Shanghai COCESS Special Alloys Co., Ltd can advise on material suitability for components potentially produced via investment casting (lost wax) if the design complexity demands it.
Castability Note: As a high-strength superalloy, 617 has higher melt viscosity and solidification shrinkage considerations compared to steel. For static components where ultimate creep ductility is less critical than shape complexity (e.g., certain furnace fixtures or non-rotating housings), casting might be evaluated, though forging is generally recommended for 617's target high-stress, high-heat rotor or load-bearing parts.
Supply Focus: Our primary expertise lies in supplying certified, custom-forged blanks and finished machined forgings that leverage the alloy's inherent 1100°C+ strength, ensuring better fatigue and creep life than standard cast equivalents.
Target Applications & Quality Assurance
Custom Inconel 617 forgings from Shanghai COCESS Special Alloys Co., Ltd are ideal for:
Gas Turbine & Aerospace: Combustion can liners, transition duct flanges, turbine disc blanks, and structural mounts requiring 1100°C oxidation resistance and creep stability.
Industrial Furnace: Heavy-duty muffle furnace ends, radiant tube supports, and high-heat fixture bases where carburization/oxidation at 1000°C+ degrades lesser alloys.
Energy/Chemical: High-Temperature Gas-Cooled Reactor (HTGR) structural rings, petrochemical reformer header forgings.
Every custom forging is delivered with an EN 10204 3.1 Material Test Certificate, detailing heat number traceability, full chemistry, and mechanical properties. We support third-party inspection (SGS, TUV, BV) and provide technical consultation on machining allowances and heat treatment verification.
For inquiries regarding custom-dimension Inconel 617 Forgings (rings, discs, shafts) or to discuss project-specific forging drawings, please contact the engineering team at Shanghai COCESS Special Alloys Co., Ltd for a professional quotation and lead time assessment.
Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com
