Table of Contents
- Inconel 330 & 660 (A286) Washers Overview
- Technical Specifications
- Technical Properties & Chemical Composition
- Inconel 330 vs. Inconel 660 (A286)
- Types of Inconel Washers
- Key Technical Advantages
- Key Applications of Inconel Washers
- Quality Assurance & Inspection Standards
- Global Export & Supply Logistics
- Frequently Asked Questions
- Contact Aurum Overseas
Inconel 330 & 660 (A286) Washers Suppliers & Exporters
If your high-temperature furnaces or aerospace turbine joints demand extreme thermal shock and carburization resistance up to 1200°C, you've reached the right source. As a leading Inconel 330 Washers Supplier and Inconel 660 Washers Exporter, Aurum Overseas manufactures precision Plain, Spring, Lock, Square, and Conical fasteners to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Our UNS N08330 / UNS S66286 Washers pair solid-solution thermal defense with high precipitation-hardened yield strength for heavy clamping loads. Complete with full EN 10204 3.1 MTR certifications, we maintain extensive stock of Incoloy 330 Washers and Alloy A286 Washers ready for rapid global dispatch.
Technical Specifications
| Parameter | Incoloy 330 Specification | Inconel 660 (Alloy A286) Specification |
|---|---|---|
| UNS Designation | UNS N08330 | UNS S66286 |
| Werkstoff Number | 1.4886 | 1.4980 / 1.4944 |
| Manufacturing Standards | ASTM B536, ASME SB536, AMS 5592 | ASTM A638, ASME SA638, AMS 5731 / 5737 |
| Size Capability | Imperial: #4 to 4" NB | Metric: M3 to M100 | Imperial: #4 to 4" NB | Metric: M3 to M100 |
| Hardness Range | 150 – 210 HB (70 – 95 HRB) | 277 – 363 HB (29 – 39 HRC) |
Technical Properties & Chemical Composition
Chemical Composition of UNS N08330 / UNS S66286 (%)
| Element | Incoloy 330 (%) | Inconel 660 / Alloy A286 (%) |
|---|---|---|
| Nickel (Ni) | 34.00 – 37.00 | 24.00 – 27.00 |
| Chromium (Cr) | 17.00 – 20.00 | 13.50 – 16.00 |
| Iron (Fe) | Balance (approx. 43.00) | Balance (approx. 53.00) |
| Silicon (Si) | 0.75 – 1.50 | ≤ 0.10 |
| Titanium (Ti) | — | 1.90 – 2.35 |
| Molybdenum (Mo) | 1.00 – 1.75 | 1.00 – 1.50 |
| Aluminum (Al) | — | ≤ 0.35 |
| Copper (Cu) | ≤ 1.00 | — |
| Manganese (Mn) | ≤ 2.00 | ≤ 2.00 |
| Carbon (C) | ≤ 0.08 | ≤ 0.08 |
| Sulfur (S) | ≤ 0.03 | ≤ 0.035 |
| Phosphorus (P) | ≤ 0.03 | ≤ 0.025 |
Mechanical & Physical Properties
| Property | Incoloy 330 | Inconel 660 |
|---|---|---|
| Ultimate Tensile Strength | ≥ 600 MPa (87,000 psi) | ≥ 965 MPa (140,000 psi) |
| Yield Strength (0.2% Offset) | ≥ 280 MPa (40,000 psi) | ≥ 655 MPa (95,000 psi) |
| Elongation (%) | ≥ 30% | ≥ 12% |
| Density | 8.08 g/cm³ (0.292 lb/in³) | 7.94 g/cm³ (0.287 lb/in³) |
| Melting Point Range | 1380°C – 1425°C (2520°F – 2600°F) | 1370°C – 1430°C (2500°F – 2600°F) |
| Max Service Temperature | 1200°C (2200°F) in oxidizing air | 704°C (1300°F) under continuous stress |
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Inconel 330 vs. Inconel 660 (A286)
| Parameter / Feature | Incoloy 330 | Inconel 660 / Alloy A286 |
|---|---|---|
| Metallurgical Class | Solid-solution austenitic alloy | Titanium precipitation age-hardened alloy |
| Key Elemental Addition | Silicon (0.75–1.50%) + High Nickel (34–37%) | Titanium (1.90–2.35%) + Aluminum (≤0.35%) |
| Max Service Temperature | Up to 1200°C (2200°F) in thermal atmospheres | Up to 704°C (1300°F) under high load |
| Primary Strength Mechanism | High-temperature oxidation & thermal shock resistance | High mechanical yield, shear, & creep-rupture strength |
| Best Suited For | Furnace hardware, muffles, and heat-treat fixtures | Gas turbines, jet engines, and high-stress manifolds |
Types of Inconel 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 Plain Washers
Inconel Spring Washers
Inconel Lock Washers
Inconel Square Washers
Inconel Conical Washers
- Plain Washer: Distributes clamping loads evenly across flange faces to prevent surface damage and localized crushing.
- Spring Washer: Maintains continuous axial tension to absorb thermal movement during severe temperature cycles.
- Lock Washer: Resists vibration loosening under dynamic operational forces using split or tooth profiles.
- Square Washer: Provides maximum surface contact and load distribution on heavy structural frames and unmachined channels.
- Conical Washer: Stores elastic energy to compensate for thermal expansion and maintain joint clamping force.
Key Technical Advantages
Silicon-Passivated Thermal Immunity (Grade 330)
High silicon content shields internal joint surfaces from carbon absorption, preventing embrittlement in heat-treat furnace environments.
Precipitation Hardening Load Retention (Grade 660/A286)
Achieves yield strength values above 655 MPa, resisting thread galling and joint relaxation at elevated temperatures.
Sigma Phase Suppression
Balanced nickel matrix prevents embrittling phase precipitation during extended service in critical temperature windows.
Non-Magnetic Response
Retains low magnetic permeability across broad temperature scales, protecting sensitive aerospace instrumentation lines.
Key Applications of Inconel Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Industrial Heat Treating | Furnace muffles, retorts, and hearth structural fasteners | Continuous thermal cycling up to 1200°C in high-carbon atmospheres |
| Aerospace & Turbines | Gas turbine manifold flanges, exhaust studs, and jet engine brackets | High creep stress and dynamic vibration at operating temperatures to 704°C |
| Petrochemical Refineries | Ethylene pyrolyzer bolting, flare tips, and catalytic cracker joints | High-sulfur exhaust streams and cyclic high-temperature oxidation |
| Power Generation | Steam superheater valve bonnet bolting and bypass manifold hardware | Elevated steam pressures demanding high yield strength and stress-rupture resistance |
Quality Assurance & Inspection Standards
As a global Inconel 330 Washers Exporter and Inconel 660 Washers Supplier, Aurum Overseas upholds comprehensive quality management protocol across every production run:
- Spectrometric PMI Testing: X-ray fluorescence analysis verifies chemical composition compliance, confirming silicon levels in 330 and titanium levels in A286.
- Mechanical & Hardness Profiling: Batch testing confirms minimum tensile strength limits and Rockwell hardness requirements (up to 39 HRC for aged Alloy A286).
- Dimensional Precision Measurement: Digital micrometer checks guarantee adherence to ASME B18.21.1, DIN 125, and DIN 127 tolerance bands.
- Microstructure & Grain Size Inspection: Metallographic checks ensure proper solution annealing and precipitate distribution.
Global Export & Supply Logistics
As a leading international supplier, Aurum Overseas exports certified Inconel 330 Washers and Inconel 660 Washers to industrial hubs across:
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Inconel 330 resists thermal oxidation and carburization up to 1200°C, while age-hardened Inconel 660 (Alloy A286) provides high yield strength (≥655 MPa) and creep-rupture resistance up to 704°C.
Yes. Both refer to UNS S66286 (Werkstoff 1.4980), an iron-nickel-chromium superalloy strengthened via titanium precipitation hardening.
Silicon (0.75–1.50%) works with nickel to form a protective scale that blocks carbon penetration in carburizing environments.
Yes. Alloy A286 maintains strong ductility, notch toughness, and non-magnetic properties down to -196°C.
All shipments include EN 10204 3.1 Material Test Reports covering chemical, mechanical, dimensional, and heat-traceability data.
Contact Aurum Overseas
Aurum Overseas provides rapid delivery of certified Inconel 330 Washers and Inconel 660 (A286) Washers for global industrial applications.
Contact our sales engineering team for technical assistance, material certifications, and rapid pricing.