Table of Contents
- Incoloy Fasteners Overview
- Incoloy Fasteners Specifications
- What are Incoloy High-Performance Alloy Nuts?
- Incoloy Fasteners Technical Properties & Composition
- Why Industries Prefer Nickel Alloy 925 Nuts
- Types of Incoloy Fasteners
- Key Advantages of Incoloy High-Performance Alloy Nuts
- Key Applications of Incoloy Fasteners
- Quality Testing & Inspection
- Global Export Markets
- Frequently Asked Questions
- Contact Aurum Overseas
Incoloy 925 Nuts Suppliers & Exporters
Aurum Overseas is a premier Incoloy 925 Nuts Supplier and specialized Incoloy 925 Nuts Exporter, delivering precipitation-hardenable iron-nickel-chromium-molybdenum-copper alloy fasteners engineered for high-strength sour gas and marine environments.
Manufactured to meet ASTM B805 standards, Nickel Alloy 925 Nuts combine the pitting resistance of Alloy 825 with double the yield strength via age hardening, withstanding downhole stress and sulfide corrosion in high-pressure equipment.
As a globally recognized Incoloy 925 Nuts Exporter, Aurum Overseas supplies fully tested and traceable bolting components across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Incoloy Fasteners Specifications
| Parameter | Specification / Technical Range |
|---|---|
| Material Grade | Incoloy 925 |
| UNS Number | UNS N09925 |
| Werkstoff Number | 2.4656 / 1.4594 |
| Manufacturing Standards | ASTM B805, ASME SB805, NACE MR0175 / ISO 15156, DIN 934, ISO 4032 |
| Size Range | M3 to M100 | 3/16" to 4" | Custom Dimensions |
| Thread Configuration | ASME B1.1 2A/3A - 2B/3B Unified (UNC, UNF) & B1.13M 6h-6G Metric |
| Nut Formats | Hex Head, Heavy Hex, Square, Lock, Eye, Wing, T, Panel, Coupling Nuts |
| Certifications | EN 10204 3.1 MTR, NACE MR0175/ISO 15156 Sour Service Compliance |
What are Incoloy High-Performance Alloy Nuts?
UNS N09925 Nuts are age-hardenable nickel-iron-chromium-molybdenum-copper alloy threaded fasteners designed for applications demanding exceptional mechanical strength combined with high resistance to general corrosion, pitting, crevice corrosion, and stress-corrosion cracking.
Unlike solid-solution strengthened nickel alloys, Incoloy 925 develops its high tensile and yield performance through a controlled heat treatment process that precipitates gamma prime (γ') phases using titanium and aluminum additions. This mechanism preserves high ductility and toughness while delivering structural reliability in deep, high-pressure sour wells and harsh offshore production systems.
Incoloy Fasteners Technical Properties & Composition
Chemical Composition of Incoloy Fasteners (%)
| Element | Incoloy 925 |
|---|---|
| Nickel (Ni) | 42.0 - 46.0 |
| Chromium (Cr) | 19.5 - 22.5 |
| Iron (Fe) | 22.0 min |
| Molybdenum (Mo) | 2.5 - 3.5 |
| Copper (Cu) | 1.5 - 3.0 |
| Titanium (Ti) | 1.9 - 2.4 |
| Aluminum (Al) | 0.1 - 0.5 |
| Manganese (Mn) | 1.0 max |
| Silicon (Si) | 0.5 max |
| Niobium (Nb) | 0.5 max |
| Carbon (C) | 0.03 max |
| Sulfur (S) | 0.03 max |
Mechanical & Physical Properties
| Property / Parameter | Technical Value |
|---|---|
| Density | 8.08 g/cm³ |
| Melting Point | 1311°C – 1366°C |
| Tensile Strength | 685 MPa min |
| Yield Strength (0.2% Offset) | 271 MPa min |
| Elongation (% in 50mm) | 56% min |
Equivalent Grade Standards
| Grade | Werkstoff Nr. | UNS | JIS |
|---|---|---|---|
| Incoloy 925 | 2.4656 / 1.4594 | UNS N09925 | NCF 925 |
Why Industries Prefer Nickel Alloy 925 Nuts
Engineers specify Nickel Alloy 925 Nuts for critical wellhead, valve, and subsea assembly applications due to their exceptional immunity to hydrogen-induced cracking (HIC) and sulfide stress cracking (SSC) in environments containing high levels of hydrogen sulfide (H₂S), carbon dioxide (CO₂), and chlorides.
The addition of molybdenum and copper offers substantial defense against reducing acids and localized pitting, while the high nickel matrix resists stress-corrosion cracking. As an established Incoloy 925 Nuts Supplier, Aurum Overseas supplies precision-machined threaded fasteners that maintain dimensional stability and clamping force under aggressive loads and sour media exposure.
Types of Incoloy Fasteners
Aurum Overseas supplies a comprehensive range of nickel alloy nut configurations manufactured according to standard DIN, ASME, and ISO dimensional tolerances for multiple engineering assemblies.
Incoloy Hex Head Nuts
Incoloy Square Nuts
Incoloy Lock Nuts
Incoloy Eye Nuts
Incoloy Wing Nuts
Incoloy T Nuts
Incoloy Panel Nuts
Incoloy Coupling Nuts
Incoloy Dome Nuts
Key Advantages of Incoloy High-Performance Alloy Nuts
Precipitation-Hardened Yield Strength
Thermal processing delivers high load-bearing capacity for demanding high-pressure applications.
Sour Service Compliance
Meets NACE MR0175 / ISO 15156 standards for resistance to sulfide stress cracking in oilfield environments.
Resistance to Pitting & Crevice Corrosion
Molybdenum and chromium additions provide defense against localized chloride attack in subsea systems.
Immunity to Stress-Corrosion Cracking
High nickel content prevents cracking induced by chloride ion concentration and tensile stress.
Low Carbon Content
Controlled carbon levels mitigate intergranular carbide precipitation during thermal cycling or joint assembly.
Key Applications of Incoloy Fasteners
| Industry Sector | Primary Fastener Application | Key Service Environment |
|---|---|---|
| Oil & Gas Downhole Equipment | Wellhead components, subsurface safety valves, tubular hangers | High-pressure sour wells containing (H₂S), (CO₂), and brine |
| Offshore Marine & Subsea | Subsea manifolds, riser bolting, marine valve body fasteners | Continuous seawater exposure and high hydrostatic pressure |
| Chemical Processing | Acid heat exchanger flanges, reaction vessel bolting | Process streams containing phosphoric and sulfuric acids |
| High-Strength Marine Hardware | Marine propulsion shafting fasteners, pump bolting | High-velocity seawater and turbulent splash zones |
Quality Testing & Inspection
Aurum Overseas implements rigorous quality control procedures for all orders managed by our team as a dedicated Incoloy 925 Nuts Supplier and Incoloy 925 Nuts Exporter.
- Chemical & Alloy Verification: XRF spectrometry and Positive Material Identification (PMI) to confirm precise alloy balance.
- Mechanical Strength Testing: Tensile, proof load, and Rockwell C hardness testing performed per ASTM E8, SAE J411, and EN 14399 standards.
- Sour Service Resistance: Inspection to verify sulfide stress cracking resistance per NACE MR0175 / ISO 15156 requirements.
- Dimensional Accuracy: Thread pitch and flatness gauging per ASME B1.2, DIN 125, DIN 9021, ISO 7090, and JIS B 1256 standards.
- Traceable Documentation: Detailed chemical heat analysis and material test reports provided per EN 10204 3.1 specifications.
Global Export Markets
As a global Incoloy 925 Nuts Exporter, Aurum Overseas supplies fully certified fasteners to major energy, chemical, and marine engineering hubs worldwide.
USA
Canada
Mexico
Germany
United Kingdom
France
Italy
Netherlands
Norway
UAE
Saudi Arabia
Qatar
Kuwait
Oman
Singapore
Malaysia
Australia
Frequently Asked Questions
Incoloy 925 has a chemical base similar to Incoloy 825, but includes titanium and aluminum additions that permit age-hardening heat treatments. This process nearly doubles the yield and tensile strength compared to Grade 825 while retaining high corrosion resistance.
Yes, UNS N09925 Nuts comply with NACE MR0175 / ISO 15156 standards, making them highly effective for downhole components, wellheads, and valve assemblies exposed to hydrogen sulfide (H₂S).
Aurum Overseas manufactures Nickel Alloy 925 Nuts in metric threads (ASME B1.13M, ISO 4032) and Unified imperial threads (UNC, UNF, 8UN) to fit standard and custom valve and flange specifications.
Yes, Aurum Overseas regularly exports certified UNS N09925 Nuts across North America (USA, Canada, Mexico), Europe (Germany, UK, France, Italy, Netherlands, Norway), the Middle East (UAE, Saudi Arabia, Qatar, Kuwait, Oman), and Asia-Pacific (Singapore, Malaysia, Australia).
Yes, as a certified Incoloy 925 Nuts Exporter, every delivery includes fully traceable EN 10204 3.1 Material Test Reports detailing chemical composition, heat treatment numbers, and mechanical test results.
Contact Aurum Overseas
Aurum Overseas delivers high-strength, sour-gas-resistant Incoloy 925 Nuts with fast turnaround times, international logistics support, and complete material certification.
Contact our technical sales engineers today for immediate assistance and competitive pricing.