Table of Contents
- Inconel 718 Washers Overview
- Inconel 718 Washers Specifications
- Technical Properties & Chemical Composition
- Why Industries Prefer Inconel 718 Washers
- Types of Inconel 718 Washers
- Key Technical Advantages of Inconel 718 Washers
- Key Applications of Inconel 718 Washers
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Inconel 718 Washers Suppliers & Exporters
Aurum Overseas is a trusted Inconel 718 Washers Supplier and Inconel 718 Washers Exporter, stocking premium nickel-chromium precipitation-hardenable fasteners in Plain, Spring, Lock, Square, and Conical styles to ASME B18.21.1, DIN 125, and ISO 7089 standards.
High nickel content (50–55%) combined with columbium/tantalum (5.13%) and titanium (0.65–1.15%) gives these UNS N07718 Washers extreme tensile performance, exceptional creep-rupture strength, and outstanding resistance to post-weld cracking. As a leading global exporter, we supply certified hardware with 100% mill traceability for fast worldwide delivery.
Inconel 718 Washers Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grade | Inconel 718 |
| UNS Designation | UNS N07718 |
| Werkstoff Number | 2.4668 |
| Manufacturing Standards | ASTM B637, ASME SB637, AMS 5662, AMS 5663 |
| Dimensional Specifications | ASME B18.21.1, DIN 125 A/B, DIN 127, DIN 9021, ISO 7089, ISO 7090 |
| Washer Types | Plain Washers, Spring Washers, Lock Washers, Square Washers, Conical Washers |
| Size Range | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Thickness Range | 0.5 mm to 12 mm (Custom gauges available on request) |
| Delivery Condition | Precipitation Hardened / Solution Annealed & Aged |
| Hardness Limit | ≤ 100 HRB (Annealed) / 36–44 HRC (Aged Condition) |
| Surface Finishes | Bright Machined, Passivated, Pickled, Descaled |
| Certification | EN 10204 3.1 MTR, PMI Verification, High-Temp Tensile Testing |
Technical Properties & Chemical Composition
Chemical Composition of UNS N07718 Washers (%)
| Element | Inconel 718 (UNS N07718) (%) |
|---|---|
| Nickel (Ni) | 50 – 55 |
| Chromium (Cr) | 17 – 21 |
| Molybdenum (Mo) | 2.8 – 3.30 |
| Columbium + Tantalum (Cb + Ta) | 5.13 |
| Titanium (Ti) | 0.65 – 1.15 |
| Aluminum (Al) | 0.20 – 0.80 |
| Cobalt (Co) | ≤ 1.00 |
| Copper (Cu) | ≤ 0.30 |
| Carbon (C) | ≤ 0.08 |
| Manganese (Mn) | ≤ 0.35 |
| Silicon (Si) | ≤ 0.35 |
| Phosphorus (P) | ≤ 0.015 |
| Sulfur (S) | ≤ 0.015 |
Mechanical Properties of UNS N07718 Washers
| Mechanical Parameter | Inconel 718 (UNS N07718) |
|---|---|
| Ultimate Tensile Strength (psi / MPa) | ≥ 135,000 psi / 930 MPa (Annealed) |
| 0.2% Yield Strength (psi / MPa) | ≥ 70,000 psi / 482 MPa (Annealed) |
| Elongation (%) | ≥ 45% |
| Hardness (Rockwell B) | ≤ 100 HRB |
Equivalent Grades of Inconel 718 Washers
| Standard / System | Inconel 718 Equivalent |
|---|---|
| Werkstoff Nr. | 2.4668 |
| UNS Designation | N07718 |
| EN Standard | NiCr19Fe19Nb5Mo3 |
Why Industries Prefer Inconel 718 Washers
Precipitation-Hardened Strength: Precipitation hardening via niobium (5.13%) and titanium (0.65–1.15%) delivers extreme yield performance under heavy static loading.
High Creep-Rupture Resistance: Maintains high mechanical load capacity without stretching or suffering thermal fatigue at continuous temperatures up to 704 deg C.
Post-Weld Strain-Age Resistance: Unique metallurgy resists strain-age cracking during welding and heat treatment, making it superior to older superalloys.
Corrosion & Oxidation Defense: High nickel (50–55%) and chromium (17–21%) matrix prevents organic acid attack, oxidation, and halide stress corrosion.
Cryogenic Toughness: Retains excellent impact strength and ductility in sub-zero aerospace and liquefied gas handling setups without becoming brittle.
Types of Inconel 718 Washers
Aurum Overseas supplies a comprehensive range of nickel alloy washer configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Inconel 718 Plain Washers
Inconel 718 Spring Washers
Inconel 718 Lock Washers
Inconel 718 Square Washers
Inconel 718 Conical Washers
Key Technical Advantages of Inconel 718 Washers
Gamma Double-Prime Phase
Niobium additions create microstructural gamma double-prime precipitation that locks dislocations for maximum shear strength.
High Bolt Load Retention
Resists permanent mechanical deformation under dynamic torque and cyclic thermal stresses.
Non-Magnetic Core
Retains low magnetic response across operational conditions, suitable for precision sensors and specialized equipment.
Grain Boundary Stability
Controlled carbon and alloy balance prevents intergranular precipitation at elevated temperatures.
Uniform Flange Clamping
Expands predictably with high-strength alloy stud bolts to ensure leak-tight seating in extreme pressure vessels.
Key Applications of Inconel 718 Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Aerospace & Defense | Rocket engines, jet turbine combustor hardware, and shaft fasteners | High thermal stresses, severe vibration, and extreme mechanical fatigue |
| Oil & Gas (Downhole) | Sour gas (H2S) deep wellhead valves, subsurface safety tools, and packers | High pressure, elevated temperatures, and sour gas environments |
| Nuclear Power | Core support structures, reactor hold-down bolting, and valve hardware | High-radiation environments requiring high creep-rupture resistance |
| Turbinery & Energy | Industrial gas turbine retorts, exhaust casings, and high-temp bolting | Continuous thermal cycles up to 704 deg C with oxidation risks |
| Cryogenic Processing | LNG pump flanges, cold-box hardware, and aerospace propellant systems | Extreme sub-zero temperatures requiring high impact resistance |
Quality Testing & Inspection
As a leading Inconel 718 Washers Supplier, Aurum Overseas enforces strict quality checks on every batch:
- Chemical Analysis: PMI testing verifies exact alloy composition—50–55% Ni, 17–21% Cr, 2.8–3.30% Mo, and 5.13% Cb+Ta—before dispatch.
- Mechanical & Hardness Testing: Load testing confirms high strength with tensile strength ≥ 135,000 psi (930 MPa) and yield strength ≥ 70,000 psi (482 MPa).
- Dimensional Inspection: Precision optical and micrometer checks verify exact thickness, inner diameter, outer diameter, and surface flatness tolerances.
- Traceable Documentation: Material test certificates (MTR) provide 100% heat traceability from raw mill stock to finished shipment.
Global Export Markets
As an established Inconel 718 Washers Exporter, Aurum Overseas supplies fully certified UNS N07718 Washers to global aerospace, defense, and energy projects:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Inconel 718 is a precipitation-hardenable superalloy containing niobium (5.13%) and titanium (0.65–1.15%), providing much higher tensile and creep-rupture strength than solid-solution alloys.
They operate effectively from cryogenic sub-zero conditions up to 704 deg C (1300 deg F) while maintaining high tensile strength and creep resistance.
Yes. Aged Inconel 718 hardware meets NACE MR0175 / ISO 15156 standards for high-strength fasteners in sour gas oilfield applications.
It offers an exceptional strength-to-weight ratio at high temperatures, high fatigue resistance, and excellent resistance to post-weld cracking.
As a trusted Inconel 718 Washers Exporter, we supply EN 10204 3.1 Material Test Reports (MTR) covering chemical composition, mechanical batch testing, and dimensional checks.
Contact Aurum Overseas
Aurum Overseas manufactures and stocks Inconel 718 Washers for urgent global project requirements.
Contact our technical sales team for instant pricing, mill test reports, and lead times.