Table of Contents
- Incoloy 925 Washers Overview
- Incoloy 925 Washers Specifications
- Technical Properties & Chemical Composition
- Why Industries Prefer Incoloy 925 Washers
- Types of Incoloy 925 Washers
- Key Technical Advantages
- Key Applications of Incoloy 925 Washers
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Incoloy 925 Washers Suppliers & Exporters
If your subsea oilfield components, downhole tools, or marine joints demand extreme yield strength alongside sulfide stress cracking immunity, you've reached the right source. As a leading Incoloy 925 Washers Supplier and Incoloy 925 Washers Exporter, Aurum Overseas supplies precision-engineered Plain, Spring, Lock, Square, and Conical washers to ASME B18.21.1, DIN 125, and ISO 7089 standards.
Our UNS N09925 Washers pair Alloy 825’s acid defense with titanium and aluminum age-hardening for double the yield strength. Backed by full MTR certifications and NACE sour-service compliance, we maintain extensive stock ready for rapid global dispatch.
Incoloy 925 Washers Specifications
| Parameter | Technical Specification / Standard Range |
|---|---|
| Material Grade | Incoloy 925 |
| UNS Designation | UNS N09925 |
| Manufacturing Standards | ASTM B805, ASME SB805, NACE MR0175 / ISO 15156 |
| 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 (Belleville) 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 + Age-Hardened (Precipitation Heat Treated) |
| Hardness Limit | 26 – 38 HRC (Sour-Service Controlled) |
| Surface Finishes | Bright Machined, Passivated, Pickled, Precision Ground |
| Certification | EN 10204 3.1 MTR, PMI Verification, Hardness & Microstructure Certification |
Technical Properties & Chemical Composition
Chemical Composition of UNS N09925 Washers (%)
| Element / Parameter | Incoloy 925 (UNS N09925) (%) |
|---|---|
| Nickel (Ni) | 42.0 – 46.0 |
| Chromium (Cr) | 19.5 – 22.5 |
| Iron (Fe) | ≥ 22.0 (Balance) |
| Molybdenum (Mo) | 2.5 – 3.5 |
| Copper (Cu) | 1.5 – 3.0 |
| Titanium (Ti) | 1.9 – 2.4 |
| Aluminum (Al) | 0.1 – 0.5 |
Mechanical & Physical Properties of UNS N09925 Washers
| Property | Metric Value | Imperial Value |
|---|---|---|
| Ultimate Tensile Strength | ≥ 965 MPa | ≥ 140,000 psi |
| Yield Strength (0.2% Proof Stress) | ≥ 724 MPa | ≥ 105,000 psi |
| Elongation (% in 4D) | ≥ 18% | ≥ 18% |
| Hardness Range | 26 – 38 HRC | 26 – 38 HRC |
| Density | 8.08 g/cm³ | 0.292 lb/in³ |
Equivalent Grades Comparison
| Standard | Incoloy 925 Equivalent |
|---|---|
| WERKSTOFF NR. | 2.4656 |
| UNS | N09925 |
| EN | NiCr21Mo3Ti |
Why Industries Prefer Incoloy 925 Washers
Age-Hardened Tensile Capacity: Controlled additions of titanium (1.9–2.4%) and aluminum (0.1–0.5%) form gamma-prime precipitates, doubling the yield strength of conventional solid-solution nickel alloys.
Sour Service Immunity: NACE MR0175 compliance ensures full resistance to sulfide stress cracking (SSC) and hydrogen embrittlement in high-pressure sour gas wells.
Pitting and Crevice Protection: Molybdenum (2.5–3.5%) and chromium (19.5–22.5%) protect under-head washer surfaces in stagnant marine and high-chloride environments.
Acid Defense Balance: Copper content (1.5–3.0%) maintains high performance in reducing chemical media, particularly sulfuric acid processing lines.
High Load Maintenance: Elevated hardness (up to 38 HRC) resists surface galling, thread yield, and clamping force loss under high joint bolt tension.
Types of Incoloy 925 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.
Incoloy 925 Plain Washers
Incoloy 925 Spring Washers
Incoloy 925 Lock Washers
Incoloy 925 Square Washers
Incoloy 925 Conical Washers
Key Technical Advantages
Precipitation Hardening Matrix
Achieves yield strength exceeding 724 MPa without compromising ductileness or fracture toughness.
Galling & Deformation Resistance
High surface hardness prevents washer crushing and thread binding during high-torque tightening.
Hydrogen Embrittlement Defense
Microstructural stability eliminates environmental cracking risks in deep downhole oilfield applications.
Thermal Pre-Load Retention
Maintains elasticity and bolt load balance in thermal cycling applications up to 538°C (1000°F).
Key Applications of Incoloy 925 Washers
| Industry Sector | Application | Operating Environment |
|---|---|---|
| Subsea & Offshore Oilfield | Wellhead valves, downhole production packers, and blowout preventers | High-pressure sour gas (H2S), high chlorides, and extreme subsea mechanical loading |
| Marine Engineering | Shafting hardware, high-strength marine bolting, and subsea risers | Continuous immersion in saltwater and splash-zone crevice corrosion conditions |
| Surface Chemical Piping | Acid gas scrubbers, high-pressure reaction pumps, and vessel flanges | Concentrated reducing and oxidizing acids at elevated operating pressures |
| High-Strength Fasteners | Heavy-duty flanged joint assemblies and severe-service structural bolting | Heavy dynamic joint vibration and high clamping force retention |
Quality Testing & Inspection
As a certified Incoloy 925 Washers Supplier, Aurum Overseas subjects all production batches to strict material quality control:
- Positive Material Identification (PMI): Spectrometric verification confirms precise chemical composition including Ti, Al, Cu, and Mo fractions.
- Hardness & Heat Treatment Verification: Hardness testing (Rockwell C) guarantees compliance with 26–38 HRC limits for sour service.
- Mechanical Strength Testing: Tensile and proof stress testing ensures minimum yield strength of 724 MPa (105 ksi).
- Microstructure Analysis: Metallographic grain structure checks confirm proper solution annealing and precipitation heat treatment.
Global Export Markets
As a globally trusted Incoloy 925 Washers Exporter, Aurum Overseas supplies fully certified UNS N09925 Washers to energy and manufacturing centers across:
USA
Canada
Mexico
Germany
United
Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi
Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Incoloy 925 includes added titanium (1.9–2.4%) and aluminum (0.1–0.5%), allowing it to be age-hardened to achieve roughly double the yield strength of Incoloy 825 while retaining similar corrosion resistance.
Yes. Incoloy 925 washers processed to the correct heat treatment and hardness level (≤ 38 HRC) comply with NACE MR0175 / ISO 15156 standards for H2S sour gas environments.
When properly precipitation-hardened, UNS N09925 Washers provide a minimum yield strength of 724 MPa (105,000 psi) and a minimum tensile strength of 965 MPa (140,000 psi).
Yes. Due to their high hardness and yield strength, Incoloy 925 washers resist deformation, crushing, and galling under extreme torque loading.
As an experienced Incoloy 925 Washers Exporter, we supply EN 10204 3.1 Material Test Reports covering chemical composition, mechanical strength, hardness testing, and heat traceability.
Contact Aurum Overseas
Aurum Overseas provides rapid delivery of certified Incoloy 925 Washers for global industrial projects.
Contact our technical sales team for instant quotes, material certification, and delivery timelines.