Aerospace-grade Inconel 718 superalloy—engineered for extreme environments from -253°C to 700°C—delivering unmatched strength, corrosion resistance & machinability. As a ISO-certified China manufacturer, YICHOU guarantees rapid turnaround, precision machining, and global compliance.

Inconel 718 (UNS N07718/DIN 2.4668) is a nickel-chromium-based superalloy strengthened by gamma prime (γ') and gamma double prime (γ″) precipitates. It dominates critical aerospace, oil & gas, and nuclear applications due to its:
Unrivaled High-Temperature Strength: Highest yield strength among deformable superalloys below 650°C, resisting creep and fatigue even under cyclic thermal stress18.
Corrosion Immunity: Exceptional resistance to oxidation, pitting, and stress corrosion cracking (SCC) in acidic, chloride-rich, or radiation-heavy environments310.
Cryogenic to Extreme Heat Stability: Reliable performance from -253°C to 700°C (short-term to 800°C)79.
Manufacturing Versatility: Excellent weldability and machinability vs. competing Ni-alloys, enabling complex part fabrication14.
Precision-controlled chemistry for consistent batch quality:
| Element | Ni | Cr | Fe | Nb+Ta | Mo | Ti | Al | C≤ |
|---|---|---|---|---|---|---|---|---|
| Wt % | 50-55 | 17-21 | Balance | 4.75-5.5 | 2.8-3.3 | 0.65-1.15 | 0.2-0.8 | 0.08 |
*Low S/P impurities (<0.015%) minimize intergranular brittleness*8.
*Tested at 20°C per AMS 5662/5664*:
| Property | Value |
|---|---|
| Tensile Strength (σb) | ≥965 MPa |
| Yield Strength (σ₀.₂) | ≥550 MPa |
| Elongation (A5) | ≥30% |
| Hardness | ≤363 HB |
At 650°C: Tensile strength remains ≥1000 MPa2.
Density: 8.24 g/cm³
Melting Range: 1260–1340°C
Thermal Conductivity: 11.4 W/m·K (20°C)
CTE (20–600°C): 13.9 µm/m·°C
We supply custom-finished parts in:
Stock Forms: Round bars (Ø15–350mm), plates (0.05–14mm), tubes (seamless/welded), forgings, rings, wires68.
Precision Machined Components: Turbine blades, fasteners (bolts/nuts), valve bodies, flanges, reactor fittings57.
Hot Working: 1120–900°C with rapid quench (water/air). Final deformation ≥20% at ≥960°C13.
Heat Treatment: Customizable cycles:
Standard Aging: 720°C/8h → furnace cool to 620°C/8h → air cool8.
Direct Aging: For enhanced strength/creep resistance48.
Welding: TIG, electron beam, seam welding with ERNiFeCr-2 filler36.
Inconel 718’s blend of strength and corrosion resistance makes it ideal for:
Aerospace: Jet engine mounts, turbine disks, thrust reversers, rocket motor cases710.
Energy: Nuclear reactor core components (grids, fuel spacers), LNG valves, downhole drilling tools18.
Industrial: High-strength bolts (ASTM A453 Grade 660), chemical reactor vessels, extrusion dies59.
⚠️ Note: Nuclear-grade variants (e.g., 718A) with boron control (<0.002%) available8.

| Competitive Edge | Your Benefit |
|---|---|
| End-to-End Production | Raw material → forging/machining → QA → delivery. Reduce logistics costs & lead times. |
| China Pricing Advantage | Cost savings up to 30% vs. EU/US suppliers without quality compromise. |
| Strict Quality Assurance | Mill certs (EN 10204 3.1), ultrasonic testing, chemical/mechanical batch reports48. |
| Rapid Customization | Tailored sizes, tempers (solution-treated/aged), and post-processing (grinding, pickling). |
YICHOU’s Inconel 718 conforms to global standards:
Aerospace: AMS 5662/5663/5664 (bars), AMS 5596/5597 (sheets)14.
Oil & Gas: NACE MR0175 (sulfide stress cracking resistant)6.
Nuclear: RCC-M (France), KTA (Germany)8.
Limited inventory available! Contact YICHOU for:
✅ Real-time pricing (FOB China, EXW, CIF).
✅ Technical datasheets & samples.
✅ Urgent orders (15–30 days standard lead time).

YICHOU—Precision Engineered Superalloys for Tomorrow’s Extreme Environments. Leverage our China manufacturing edge for Inconel 718 parts that outperform & outlast.
Let Yichou help you achieve excellence in your next project. Whether you need raw materials, custom alloy solutions, or precision-manufactured components, our team is ready to assist.