Inconel 718 Alloy Coil (Ni-Cr-Fe-Nb Alloy) | Unmatched High-Temperature Strength & Fatigue Resistance

✓ Ultra-High Yield Strength: Achieves 1,275 MPa yield strength after aging – 40% stronger than Inconel 625 at 650°C (1,202°F).

✓ Oxidation Resistance: Stable Cr₂O₃ oxide layer formation at 800°C (1,472°F), reducing scaling by 70% vs. 310S stainless steel.

✓ Cryogenic-to-High-Temperature Versatility: Maintains ductility from **-250°C (-418°F)** to 700°C (1,292°F).

✓ Precision Fabrication: Cold-rolled coils with **±0.02mm thickness tolerance** and Ra ≤0.4μm surface finish for stamping/forming.

Inconel 718 Alloy Coil (Ni-Cr-Fe-Nb Alloy)

Engineered for aerospace, oil & gas, and nuclear applications demanding extreme mechanical strength and thermal stability, Inconel 718 alloy coil combines a nickel-chromium-iron-niobium matrix (Ni-52.5%, Cr-19%, Fe-18.5%, Nb-5%, Mo-3%) to deliver exceptional yield strength, creep resistance, and corrosion resistance up to 700°C (1,292°F). Certified to AMS 5596, ASTM B637, and ASME SB637, this age-hardenable superalloy outperforms Inconel 625 and Waspaloy in high-stress environments, offering 2x the fatigue lifespan of 316L stainless steel in cyclic load applications.

Thickness: 0.1mm–6mm (cold-rolled)
Width: 10mm–1,500mm (slit-to-width precision ±0.1mm)
Surface Finishes: Bright Annealed, Pickled, Grinded (Ra ≤0.8μm)
Mechanical Properties (Aged): Yield Strength ≥1,100 MPa | Tensile Strength ≥1,400 MPa | Elongation ≥12% | Hardness ≤40 HRC

Parameter Category	Value/Description
Material Standard	ASTM B637 (Coil/Strip), AMS 5596 (Aerospace), GB/T 14992 (China)
Chemical Composition (%)	Ni (Balance), Cr 17.0–21.0, Fe ≤18.0, Nb+Ta 4.75–5.50, Mo 2.80–3.30, Ti 0.65–1.15, Al 0.20–0.80, C ≤0.08, Mn ≤0.35, Si ≤0.35, S ≤0.015, P ≤0.015, Cu ≤0.30
Tensile Strength (MPa)	≥1240 (Solution Treated & Aged)
Yield Strength (MPa)	≥1035 (Solution Treated & Aged)
Elongation (%)	≥15 (in 50mm gauge length)
High-Temperature Strength	– 650°C: Tensile Strength ≥950 MPa – 650°C: 100h Creep Rupture Strength ≥300 MPa
Hardness	Brinell (HBW): 330–400; Rockwell (HRC): 35–45
Density (g/cm³)	8.19
Melting Range (°C)	1260–1336
Thermal Conductivity (W/m·K)	11.4 (at 20°C)
Thermal Expansion (10⁻⁶/°C)	13.0 (20–600°C)
Electrical Resistivity (Ω·m)	1.28 × 10⁻⁶ (at 20°C)
Elastic Modulus (GPa)	200
Oxidation Resistance	Excellent oxidation resistance up to 700°C in air. Stable under cyclic thermal stress.
Corrosion Resistance	Resists pitting, chloride stress corrosion, and high-temperature oxidation. Avoid strong acids (e.g., HNO₃).
Heat Treatment	– Solution Treatment: 980°C (1h, air cooling) – Aging: 720°C (8h, furnace cool to 620°C, hold 8h, air cool).
Surface Finishes	Cold-rolled bright annealed (BA), Pickled & Passivated, Polished (Ra ≤0.6μm).
Coil Dimensions	– Thickness: 0.5mm–6.0mm – Width: 50mm–1500mm – Inner Diameter (ID): 300mm–610mm – Outer Diameter (OD): ≤2500mm.
Key Applications	Aerospace seals/springs, nuclear reactor coolant channels, oil/gas downhole tools, chemical processing coils, and high-temperature electronic shielding.

Inconel 718 Alloy Coil (Ni-Cr-Fe-Nb Alloy) Applications

Industry	Critical Use Cases	Inconel 718 Coil Advantage
Aerospace	Jet engine turbine blades, fuel nozzles	1,275 MPa yield strength at 650°C for 20,000+ flight cycles.
Oil & Gas	Subsea wellhead connectors, sour gas pipelines	Resists H₂S/CO₂ corrosion at 200°C (392°F) + 25,000 psi.
Nuclear	Reactor coolant channels, control rod cladding	Immune to neutron embrittlement and stress corrosion cracking (SCC).
Energy	Gas turbine shafts, steam valve components	Withstands creep deformation at 700°C (1,292°F).

Inconel 718 Alloy Coil (Ni-Cr-Fe-Nb Alloy) Product Packaging

Inconel 718 Alloy Coil (Ni-Cr-Fe-Nb Alloy) (UNS N06625/N07718, ASTM B168/ASME SB-168 compliant) are engineered for extreme environments in aerospace, chemical processing, and power generation (operating up to 1,200°C). To ensure flawless surface integrity and dimensional stability during global transit, we deploy aerospace-certified packaging systems and intelligent logistics protocols compliant with AMS 5598, NACE MR0175, and ISO 9328-2 standards.

Why Choose Us

Where Precision Meets Partnership，25 years of focus on metal material science，Not only a supplier, but also your engineering consultant，Fast and zero compromise，Sustainable trust cycle。

Inconel 718 Alloy Coil (Ni-Cr-Fe-Nb Alloy) Shipping

Sea transport

40HQ container (loading capacity 28 tons) / bulk carrier (LCL minimum 1 ton)

Air transport

reach major airports around the world within 7 days (DDP/DAP terms)

Land transport

door-to-door within China (qualification for dangerous goods transportation)

Our Services

We guarantee global door-to-door delivery within 7–15 business days via partnerships with DHL, Maersk, and UPS.

FAQ

Q1: How does Inconel 718 compare to Waspaloy in high-temperature performance?

A: Inconel 718 offers 30% higher yield strength at 700°C and superior weldability, while Waspaloy excels in higher creep resistance above 700°C.

Q2: What aging treatment optimizes mechanical properties?

A: Solution anneal at 955–980°C (1,750–1,800°F) for 1h, air cool, then age at 720°C (1,328°F) for 8h and 620°C (1,148°F) for 8h to achieve AMS 5596 specs.

Q3: Are coils certified for aerospace turbine blades?

Full compliance includes: