Inconel 718 Forging & Forged Parts Wholesale

In the manufacture of aircraft engine turbine discs, compressor rotors, and high-strength pressure-retaining components for sour-gas wells, the quality of the forging stock and finished forged preform​ is decisive for final part fatigue life and ultrasonic inspectability. Inconel 718 (UNS N07718 / W.Nr. 2.4668 / GH4169)​ is the world's most extensively used precipitation-hardening Ni-Cr-Fe superalloy, achieving yield strengths ≥ 1035 MPa (150 ksi) after age hardening via γ" (Ni₃Nb) precipitate formation. Shanghai COCESS Special Alloys Co., Ltd​ supplies wholesale Inconel 718 open-die forgings, ring rollings, forged bars/billets, and rough-machined forged parts in strict accordance with ASTM B637, AMS 5662 (solution treated), and AMS 5663 (aged), with full traceability, optional VIM+ESR melt route, and third-party inspection (SGS / TÜV / DNV).

Metallurgical Requirement for Forgings — Chemistry & Grain Control

Inconel 718 derives its strength from coherent γ" (Ni₃Nb) and minor γ' (Ni₃(Al,Ti)) precipitates. For critical rotating forgings (turbine discs), microstructure control—specifically delta phase (δ-Ni₃Nb) content and grain size uniformity—is as important as chemistry.

Typical Chemistry (wt%, per AMS 5662 / ASTM B637):

• Nickel (Ni):​ 50.00 – 55.00 % (Balance)

• Chromium (Cr):​ 17.00 – 21.00 %

• Iron (Fe):​ 16.00 – 20.00 % (Austenite stabilizer)

• Niobium + Tantalum (Nb+Ta):​ 4.75 – 5.50 % (Primary γ" strengthener)

• Molybdenum (Mo):​ 2.80 – 3.30 %

• Titanium (Ti):​ 0.65 – 1.15 %

• Aluminum (Al):​ 0.20 – 0.80 %

• Carbon (C):​ ≤ 0.08 %

• Sulfur (S):​ ≤ 0.015 % (Tightly controlled for hot workability & cleanliness)

• Boron (B):​ ≤ 0.006 %

• Cobalt (Co):​ ≤ 1.00 %

We recommend VIM + ESR (Vacuum Induction Melting + Electroslag Remelting)​ for aerospace-grade discs to minimize oxide/sulfide inclusions and control gas content (O, N, H), directly improving Low Cycle Fatigue (LCF) performance.

Mechanical Properties (Solution Treated + Double Aged per AMS 5663)

Forgings are typically supplied in the solution-annealed condition​ and aged by the customer post-machining, or supplied pre-aged (AMS 5663) when specified.

• Tensile Strength (Rm):​ ≥ 1275 MPa (185 ksi); typical 1300 – 1380 MPa

• Yield Strength (Rp0.2):​ ≥ 1035 MPa (150 ksi); typical 1100 – 1170 MPa

• Elongation (A5):​ ≥ 12 – 15 %

• Reduction of Area:​ ≥ 15 – 20 %

• Hardness:​ 331 – 401 HB (34 – 44 HRC in aged condition)

• Density:​ 8.24 g/cm³

• Service Temp Range:​ –253 °C to 650 °C continuous

Forging Forms & Wholesale Supply Scope

Shanghai COCESS maintains wholesale capacity and stock for the following Inconel 718 forged products:

• Forging Reduction Ratio:​ Typically ≥ 4:1 (axial) and ≥ 2:1 (transverse) for critical rotating parts, documented in MTR / inspection report.

• Grain Size:​ Controlled per ASTM E112, typically ASTM 5–8 for disc forgings depending on forging reduction and delta phase heat treatment.

• Heat Treatment:​ In-house solution anneal (955–980 °C / rapid quench) and double-step aging (720 °C × 8h → furnace cool to 620 °C × 8h) with full thermal chart.

<h3>Quality Assurance & NDT for Forged Products</h>

Every wholesale lot ships with EN 10204 3.1 Mill Test Report​ (heat analysis, mechanical results, heat treat record, macro/micro grain photos if requested). For aerospace/nuclear applications we offer:

• Ultrasonic Testing (UT):​ Per ASTM A388 / SEB 682 / AMS 2154 (Class AA or A as specified)

• Magnetic Particle Inspection (MT):​ Per ASTM E1444 / AMS 2647

• Penetrant Testing (PT):​ For non-magnetic areas or final machined surfaces

• Dimension & Profile Inspection:​ CMM or template checking per customer drawing

• Third-Party Witness:​ SGS, TÜV, DNV, BV, ABS available on request

• NACE MR0175 Compliance:​ Material verified for sour-service oil & gas applications

Typical Applications of Inconel 718 Forgings

• Aerospace & Defense:​ Turbine discs, compressor discs, spacers, blade root forgings, engine mount rings, rocket turbopump impeller blanks.

• Power Generation (Gas / Nuclear):​ IGT rotor discs, bolting, nuclear reactor internals.

• Oil & Gas / Subsea:​ Mandrels, packer components, hanger bodies, high-strength flanges in H₂S/CO₂/Cl⁻ sour environments.

• High-Performance Motorsport / R&D:​ Turbocharger wheel blanks, connecting rod forgings.

For Inconel 718 forging stock, rolled rings, or custom rough-machined forged parts—including current capacity, sample MTR, or a formal quotation—please contact Shanghai COCESS Special Alloys Co., Ltd. Our technical team can advise on forging reduction ratio, delta phase heat treatment, allowable draft angles, and NDT acceptance criteria to ensure your forged preforms meet final-part specification requirements.

Website: https://en.cocessalloys.com
Email: sales@cocessalloys.com