UNS N07718 (Inconel 718)
Generic Name & Other Designation
Inconel 718®,Alloy 718,Nickel Alloy 718,W.Nr. 2.4668,NiCr19Fe19Nb5Mo3 , NiCr19NbMo
Product Overview
UNS N07718 (commonly referred to as Inconel 718 or W.Nr. 2.4668) is a precipitation-hardenable Ni-Cr-Fe superalloy, strengthened through precise additions of Nb, Mo, Ti, and Al, the alloy forms a γ” strengthening phase during heat treatment, achieving exceptional yield, tensile, and impact strength.
Engineered for extreme operating environments, UNS N07718 is widely utilized in modern industrial applications requiring resistance to severe mechanical stress, elevated temperatures, and aggressive corrosive media.
Core Highlights
✅ Superior Temperature Resistance: Maintains high tensile and creep-rupture strength across extreme temperature ranges, from cryogenic -253°C up to 704°C (1300°F).
✅ Exceptional Weldability & Crack Resistance: Slow age-hardening response allows annealing and welding without spontaneous post-weld cracking, offering superior fabricability among superalloys.
✅ Outstanding Corrosion Resistance: Formulated with high chromium and nickel content, providing excellent resistance to organic/inorganic acids, oxidizing environments, and chloride stress-corrosion cracking (compliant with NACE MR0175).
✅ Comprehensive Inventory & Custom Processing: BELNADE supplies fully certified bars, plates, seamless pipes, and forgings conforming to ASTM, AMS, and ASME standards with custom cutting services.
Chemical Composition & Physical Properties
1. Chemical Composition (Weight %)
Element | Ni + Co | Cr | Fe | Cu | Co | Nb + Ta | Mo | Ti | Al | C | Mn | Si | P | S |
Standard | 50.0 – 55.0 | 17.0 – 21.0 | Bal. | ≤ 0.3 | ≤ 1.0 | 4.75 – 5.50 | 2.80 – 3.30 | 0.65 – 1.15 | 0.20 – 0.80 | ≤ 0.08 | ≤ 0.35 | ≤ 0.35 | ≤ 0.015 | ≤ 0.015 |
2. Physical & Mechanical Properties
Property | Value (Metric) | Value (Imperial) | Condition / Standard |
Density | 8.19 g/cm³ | 0.296 lb/in³ | — |
Melting Range | 1260°C – 1336°C | 2300°F – 2437°F | — |
Tensile Strength (Rm) | ≥ 1240 MPa | ≥ 180 ksi | Solution + Aged |
Yield Strength (Rp0.2) | ≥ 1030 MPa | ≥ 150 ksi | Solution + Aged |
Elongation (A5) | ≥ 12% | ≥ 12% | Solution + Aged |
Hardness | 36 – 44 HRC | 36 – 44 HRC | Solution + Aged |
Available Forms
BELNADE supplies UNS N07718 products in a wide variety of forms, dimensions, and conditions to meet global client specifications:
Round Bars & Rods: Outer Diameter 6mm – 450mm; Cold-drawn, Peeled, Hot-rolled, or Centerless Ground.
Plates & Sheets: Thickness 0.5mm – 60mm; Custom waterjet or laser precision cutting available.
Pipes & Tubes: Seamless and welded options in various wall thicknesses for high-pressure applications.
Flanges & Forgings: WN, SO, BL flanges, forged rings, blocks, and custom valve bodies.
Fasteners & Welding Wire: High-tensile studs, bolts, nuts, and ERNiFeCr-2 filler wires.
Typical Applications
Due to its balanced mechanical integrity and corrosion resistance, UNS N07718 is heavily specified across demanding industries:
Aerospace & Defense: Liquid-fueled rocket engine components, turbine blades, gas turbine discs, thrust reversers, and high-strength fasteners.
Oil & Gas (Downhole & Offshore): Subsea wellhead tools, safety valves, polished bore receptacles, and valve shafts operating in severe sour service environments (H2S/Chloride).
Nuclear Engineering: Control rod drive mechanisms, nuclear reactor internal fasteners, and high-temperature springs.
Energy & Power Generation: High-temperature bolting, industrial gas turbine components, and specialty pump shafts.
Quality Assurance & Testing
At BELNADE, every shipment undergoes rigorous quality control to ensure full compliance with international standards and technical requirements:
Certification: Material Test Certificate (MTC) supplied compliant with EN 10204 3.1.
Quality Inspections:
Positive Material Identification (PMI / XRF Analysis)
Room Temperature & High-Temperature Tensile Testing
Metallographic & Grain Size Examination
Ultrasonic Testing (UT) & Non-Destructive Testing (NDT)
Hardness Testing & Intergranular Corrosion Resistance Verification
Product Supplier: BELNADE
As a trusted global supplier of nickel alloys and high-temperature materials, BELNADE provides high-quality UNS N07718 (Inconel 718) products backed by end-to-end service support.
Global Logistics & Supply Chain: Efficient warehouse management offering fast turnaround, multilingual customer service, and international sea/air export capabilities.
Custom Processing & Machining: Equipped with CNC band saws, laser cutting, and precision machining equipment to deliver exact dimension requirements.
Technical Consultancy: Our metallurgical experts are available to provide material selection, thermal processing, and engineering consultation tailored to your specific working conditions.
Get in Touch with BELNADE for Quotes and Technical Inquiries
📧 Email: info@belnade-material.com
🌐 Website: www.belnade-material.com
💬 Mobile/ WhatsApp: +86 158-0040-6687