Table of Contents
- Inconel 625 Washers Overview
- Inconel 625 Washers Specifications
- Technical Properties & Chemical Composition
- Why Industries Prefer Inconel 625 Washers
- Types of Inconel 625 Washers
- Key Technical Advantages of Inconel 625 Washers
- Key Applications of Inconel 625 Washers
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Inconel 625 Washers Suppliers & Exporters Worldwide
Aurum Overseas is a premier Inconel 625 Washers Supplier and Inconel 625 Washers Exporter, stocking high-performance nickel-chromium-molybdenum fasteners in Plain, Spring, Lock, Square, and Conical styles built to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Alloyed with high nickel (58.0% min), chromium (20.0–23.0%), molybdenum (8.0–10.0%), and niobium/columbium (3.15–4.15%), these UNS N06625 Washers deliver exceptional strength without heat treatment and maximum resistance to severe pitting, crevice attack, and marine corrosion. As a global Inconel 625 Washers Exporter, we supply fully certified hardware with 100% mill traceability for rapid worldwide dispatch.
Inconel 625 Washers Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grade | Inconel 625 |
| UNS Designation | UNS N06625 |
| Werkstoff Number | 2.4856 |
| Manufacturing Standards | ASTM B446, ASTM B564, ASME SB446, ASME SB564 |
| 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 | Solution Annealed / Grade 1 Annealed |
| Hardness Limit | ≤ 25 HRC / ≤ 250 HB |
| Surface Finishes | Bright Machined, Passivated, Pickled, Descaled |
| Certification | EN 10204 3.1 MTR, PMI Verification, Pitting Corrosion Testing |
Technical Properties & Chemical Composition
Chemical Composition of UNS N06625 Washers (%)
| Element | Inconel 625 (UNS N06625) (%) |
|---|---|
| Nickel (Ni) | 58.0 min |
| Chromium (Cr) | 20.0 – 23.0 |
| Molybdenum (Mo) | 8.0 – 10.0 |
| Niobium + Tantalum (Nb + Ta) | 3.15 – 4.15 |
| Iron (Fe) | 5.0 max |
| Carbon (C) | ≤ 0.10 |
| Manganese (Mn) | ≤ 0.50 |
| Silicon (Si) | ≤ 0.50 |
| Sulfur (S) | ≤ 0.015 |
| Phosphorus (P) | ≤ 0.015 |
Mechanical Properties of UNS N06625 Washers
| Mechanical Parameter | Inconel 625 (UNS N06625) |
|---|---|
| Tensile Strength (MPa / psi) | 930 MPa / 135,000 psi |
| Yield Strength 0.2% Offset (MPa / psi) | 517 MPa / 75,000 psi |
| Elongation (%) | 42.5% |
| Density (g/cm³) | 8.40 g/cm³ |
| Melting Point | 1350°C (2460°F) |
Equivalent Grades of Inconel 625 Washers
| Standard / System | Inconel 625 Equivalent |
|---|---|
| Werkstoff Nr. | 2.4856 |
| UNS Designation | N06625 |
| EN Standard | NiCr22Mo9Nb |
Why Industries Prefer Inconel 625 Washers
Severe Pitting & Crevice Protection: Molybdenum (8–10%) and niobium matrix prevent localized crevice attack under bolt heads in stagnant seawater and aggressive acid streams.
Solid-Solution Matrix Strengthening: Niobium and molybdenum stiffen the nickel-chromium matrix, delivering high yield strength (517 MPa) without age-hardening heat treatments.
High Mechanical Load Retention: Impressive tensile strength (930 MPa) ensures bolted flanges remain tightly clamped under heavy dynamic fatigue and vibration.
Wide Thermal Operating Range: Maintains exceptional fatigue strength and toughness from cryogenic sub-zero temperatures up to 982°C (1800°F).
Types of Inconel 625 Washers
Aurum Overseas supplies a comprehensive range of stainless steel washer configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Inconel 625 Plain Washers
Inconel 625 Spring Washers
Inconel 625 Lock Washers
Inconel 625 Square Washers
Inconel 625 Conical Washers
Key Technical Advantages of Inconel 625 Washers
Self-Passivating Passive Layer
High chromium and molybdenum content rapidly forms an ultra-stable oxide film that resists high-velocity seawater erosion.
Subsea Fatigue Resistance
High tensile strength and elasticity prevent joint slackening in deepwater subsea risers and offshore bolted assemblies.
Non-Magnetic Core
Maintains low magnetic permeability across extreme temperature ranges, making it ideal for naval sonar and magnetic-sensitive equipment.
Intergranular Corrosion Resistance
Controlled low carbon content combined with niobium stabilization prevents harmful carbide precipitation during high-temperature service.
Matched Expansion Behavior
Thermal expansion aligns with matching nickel-alloy bolting to prevent joint relaxation during rapid thermal cycling.
Key Applications of Inconel 625 Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Offshore & Marine | Subsea wellhead equipment, riser clamps, and offshore platform bolting | Stagnant seawater, high hydrostatic pressures, and splash-zone erosion |
| Chemical Processing | Phosphoric acid reactors, sour gas scrubbers, and organic acid piping | Highly concentrated oxidizing and reducing chemical streams |
| Aerospace & Defense | Jet engine thrust reverser hardware, exhaust ducting, and turbine bolting | High-velocity thermal gas streams, vibration, and thermal fatigue |
| Oil & Gas (Downhole) | Sour gas (H₂S) wellhead valves, packers, and extraction equipment | Acid gas environments requiring NACE MR0175 / ISO 15156 compliance |
| Nuclear Power | Control rod drive mechanisms and reactor core support hardware | High-purity pressurized water and high-radiation thermal conditions |
Quality Testing & Inspection
As a leading Inconel 625 Washers Supplier, Aurum Overseas enforces strict quality checks on every batch:
- Chemical Analysis: PMI testing verifies exact alloy chemistry—58% min Ni, 20–23% Cr, 8–10% Mo, and 3.15–4.15% Nb—before dispatch.
- Mechanical & Hardness Testing: Load testing confirms high strength with tensile strength ≥ 930 MPa and yield strength ≥ 517 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 625 Washers Exporter, Aurum Overseas supplies fully certified UNS N06625 Washers to global marine, chemical, 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 625 gets its high strength (930 MPa tensile) from the solid-solution strengthening effect of molybdenum and niobium within its nickel-chromium matrix.
They operate effectively from cryogenic temperatures up to 982°C (1800°F), offering superior oxidation resistance and high temperature fatigue strength.
Yes. High nickel, chromium, and molybdenum levels provide exceptional resistance to pitting, crevice attack, and chloride stress corrosion in seawater environments.
As a trusted Inconel 625 Washers Exporter, we provide complete EN 10204 3.1 Material Test Reports (MTR) covering chemical composition, mechanical properties, and dimensional checks.
Contact Aurum Overseas
Aurum Overseas manufactures and stocks Inconel 625 Washers for urgent global project requirements.
Contact our technical sales team for instant pricing, mill test reports, and lead times.