Unifit Metalloys Inc. is a trusted supplier of Inconel 625 Fasteners, built for high-performance use in extreme environments. Made from a nickel-chromium-molybdenum-niobium alloy, these fasteners offer excellent resistance to pitting, crevice corrosion and chloride-induced stress corrosion cracking.
We offer a complete range of fasteners including hex bolts, nuts, studs, washers, screws and threaded rods ideal for critical applications in marine, aerospace, chemical processing, and nuclear industries. Withstanding temperatures up to 1000°C, Inconel 625 fasteners deliver high fatigue strength and oxidation resistance.
These fasteners gain strength through cold working, not heat treatment, ensuring long-term durability and dimensional stability under load. Manufactured as per ASTM B446 / UNS N06625 / EN 2.4856, all products are made using top-grade raw materials under strict quality controls.
Whether you need standard or custom Inconel 625 fasteners, Unifit Metalloys guarantees quick delivery, global standards and technical reliability for your most demanding applications.
Request QuoteWhat is Inconel 625?
Inconel 625 is a nickel-based superalloy known for its superior strength and corrosion resistance especially in extreme environments. With key alloying elements such as chromium, molybdenum and niobium, it offers remarkable resistance to pitting, crevice corrosion and stress corrosion cracking in both oxidizing and reducing conditions. Unlike other high-performance alloys, Inconel 625 retains its mechanical integrity at temperatures up to 1000°C and in high-pressure conditions making it ideal for use in aerospace, marine, nuclear and chemical processing industries.
This alloy is non-magnetic and provides high fatigue and tensile strength without the need for precipitation-hardening treatments. It also offers excellent weldability which is particularly useful in fabrication and repair of critical components. Fasteners made from Inconel 625 are often used where both strength and corrosion resistance are essential especially in high-salinity or acidic environments.
Types of Inconel 625 Fasteners
Inconel 625 Fasteners are available in a wide variety of forms, each designed to meet specific mechanical and environmental demands. Thanks to their superior corrosion resistance, thermal stability and high tensile strength, these fasteners are well-suited for critical applications in offshore platforms, aerospace systems, chemical processing units and marine environments.
From standard bolts and nuts to specialized components like socket head cap screws and stud bolts, Inconel 625 fasteners offer reliable performance even in the most challenging conditions. Below is a comprehensive list of available types to suit diverse industrial requirements:
- Inconel 625 Structural Bolts
- Inconel 625 Heavy Hex Bolts
- Inconel 625 Hex Bolts
- Inconel 625 Hexagon Head Bolts
- Inconel 625 Machine Bolts
- Inconel 625 T Bolts
- Inconel® 625 Eye Bolt
- Inconel 625 Foundation Bolts
- Inconel® Alloy 625 J Bolts
- Inconel 625 Button Head Bolt
- Inconel 625 Anchor Bolts
- Inconel 625 Long Bolts
- Inconel 625 Carriage Bolt
- Inconel 625 Elevator Bolt
- Inconel 625 Timber Bolts
- Inconel 625 Square Bolt
- Inconel 625 Metric Bolt
- Inconel 625 Plow Bolts
- Inconel 625 U Bolts
- Inconel 625 Flange Bolts
- Inconel 625 Hex Nuts
- Inconel 625 Heavy Hex Nuts
- Inconel 625 Wing Nuts
- Inconel 625 Hexagon Nuts
- Inconel 625 Cap Nuts
- Inconel 625 Square Nuts
- Inconel 625 Coupling Nuts
- Inconel 625 Hex Jam Nuts
- Inconel Alloy 625 T-Nuts
- Inconel® Alloy 625 Eye Nuts
- Inconel 625 Nylock Nuts
- Inconel® 625 High Tensile Nuts
- Inconel 625 Cage Nuts
- Inconel 625 Dome Nuts
- Inconel 625 Knurled Nuts
- Inconel 625 Keps-K Lock Nuts
- Inconel 625 Machine Hex Nuts
- Inconel 625 Slotted Nuts
- Inconel 625 Plain Washers
- Inconel 625 Spring Washers
- Inconel 625 Locking Washer
- Inconel 625 Split Washer
- Inconel® Alloy 625 Flat Washers
- Inconel 625 Ogee Washers
- Inconel 625 Fender Washer
- Inconel 625 Conical Washers
- Inconel 625 Serrated Washer
- Inconel 625 Tab Washers
- Inconel 625 Hex Washer
- Inconel 625 Countersunk Washer
- Inconel Alloy 625 Dock Washers
- Inconel 625 Spring Lock Washer
- Inconel 625 Star Washer
- Inconel 625 Bonded sealing Washer
- Inconel 625 Square Washers
- Inconel® 625 Belleville Washer
- Inconel® 625 Socket Set Screw
- Inconel 625 Self Drilling Screw
- Inconel 625 Socket Head Cap Screw
- Inconel 625 Hex Head Screws
- Inconel 625 Wood Screw
- Inconel 625 Eye Screw
- Inconel 625 Wing Screw
- Alloy 625 Self Tapping Screws
- Inconel 625 Roofing Screw
- Inconel 625 Phillips Head Screw
- Inconel 625 Decking Screw
- Inconel 625 Machine Screw
- Inconel 625 Thumb Screw
- Inconel 625 Drywall Screws
- Inconel 625 Chipboard Screw
- Inconel 625 Metric Set Screws
- Inconel 625 Sems Screw
- Alloy 625 Thread Rolling Screw
- Inconel 625 Full Threaded Stud Bolts
- Inconel 625 Half Threaded Stud Bolts
- Inconel 625 Threaded Rod
- Inconel 625 Double Ended Studs
- Inconel 625 Tap End Stud Bolt
- Inconel® Alloy 625 Tie Rods
- Inconel Alloy 625 Studs
- Inconel 625 Single End Stud Bolts
- Inconel 625 Reduced Shank Stud Bolt
- Alloy 625 Continuous Threaded Stud
- Inconel 625 Partial Threads Stud Bolt
- Inconel® 625 Heavy Stud Bolts
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Inconel 625 Chemical Composition for Fasteners
Inconel 625 fasteners are composed of a robust nickel-based alloy designed to deliver outstanding corrosion resistance and mechanical strength in severe environments. The alloy’s chemical makeup is specially formulated to resist pitting, crevice corrosion and chloride-induced stress corrosion cracking making it ideal for marine, chemical, and high-temperature applications. Below is the typical chemical composition of Inconel 625 fasteners:
| Element | Minimum (%) | Maximum (%) |
|---|---|---|
| Nickel (Ni) | 58.0 | Balance |
| Chromium (Cr) | 20.0 | 23.0 |
| Molybdenum (Mo) | 8.0 | 10.0 |
| Niobium (Nb) + Tantalum (Ta) | 3.15 | 4.15 |
| Iron (Fe) | — | 5.0 |
| Carbon (C) | — | 0.10 |
| Manganese (Mn) | — | 0.50 |
| Silicon (Si) | — | 0.50 |
| Phosphorus (P) | — | 0.015 |
| Sulfur (S) | — | 0.015 |
| Aluminum (Al) | — | 0.40 |
| Titanium (Ti) | — | 0.40 |
Inconel 625 Mechanical Properties for Fasteners
Inconel 625 fasteners are valued for their exceptional mechanical strength, high fatigue resistance, and durability under extreme temperatures and corrosive environments. The alloy retains its integrity at temperatures up to 1000°C and offers excellent resistance to creep, stress rupture and oxidation.
Since, Inconel 625 cannot be hardened by heat treatment, it is typically strengthened through cold working. This provides enhanced dimensional stability and resistance to deformation under mechanical and thermal loads.
| Property | Value |
|---|---|
| Tensile Strength (min) | ≥ 827 MPa (120 ksi) |
| Yield Strength (0.2% offset, min) | ≥ 414 MPa (60 ksi) |
| Elongation (in 50mm, min) | ≥ 30% |
| Hardness | ≤ 30 HRC |
| Density | 8.44 g/cm³ |
| Melting Point | 1290 – 1350°C |
| Operating Temperature Range | Up to 1000°C |
Inconel 625 Material Specification for Fasteners
Inconel 625 fasteners are manufactured to meet stringent global standards for performance in extreme conditions. These specifications ensure precise dimensions, superior mechanical properties and corrosion resistance across a wide range of industrial applications.
Inconel 625 Fasteners Specification
| Specifications | ASTM F467, ASTM F468, ASTM B564, ASTM B446 |
|---|---|
| Standard | DIN, ISO, JIS, GB, IS, BS, ASTM |
| Length | 3mm to 200mm |
| Size | M02 to M160, Custom Sizes |
Inconel 625 Equivalent Grades for Fasteners
Inconel 625 is recognized under various international standards and specifications making it easier to source and substitute across global markets. Whether you're referring to UNS, ASTM, EN or Werkstoff designations, the alloy maintains consistent chemical and mechanical properties. Below is a quick reference to its equivalent grades used worldwide:
| Standard | Equivalent Grade |
|---|---|
| UNS | N06625 |
| ASTM | B446 / B564 / B443 / B704 / B705 |
| EN | 2.4856 |
| Werkstoff Nr. | 2.4856 |
| BS | NA 21 |
| ISO | ISO 15156-3 |
Inconel 625 vs Incoloy 825: Key Differences
Inconel 625 and Incoloy 825 are both corrosion-resistant nickel alloys, but they serve different industrial needs. Inconel 625 is preferred for high-strength, high-temperature applications while Incoloy 825 is optimized for acidic environments and chemical resistance.
| Property | Inconel 625 | Incoloy 825 |
|---|---|---|
| Composition | Nickel-Chromium-Molybdenum-Niobium | Nickel-Iron-Chromium-Molybdenum-Copper |
| Corrosion Resistance | Excellent (pitting, crevice, SCC) | Very good (acidic environments) |
| Temperature Resistance | Up to ~1000°C | Up to ~540°C |
| Mechanical Strength | Higher, excellent fatigue resistance | Moderate |
| Hardening Method | Cold working | Cold working |
| Best Suited For | Marine, aerospace, nuclear, offshore | Acid production, chemical processing |
| UNS Number | N06625 | N08825 |
| Standard | ASTM B446 | ASTM B425 |
Applications of Inconel 625 Fasteners
Inconel 625 fasteners are widely used in applications that demand superior corrosion resistance, high strength, and reliability under extreme temperatures. Their exceptional performance in chloride-rich, high-pressure and oxidizing environments makes them ideal for various industries.
Typical applications include:
- Civil Construction Industries
- Ship Building Industries
- Heavy Engineering Industries
- Fertilizer Plants
- Power Generation Units (Nuclear, Hydro, or Thermal)
- Petro-Chemical Industries
- Oil Expansion Projects
- Offshore & Onshore Oil Towers
- Home Fittings
- Valves, Vessels, and Pumps
- Railways
- Steel Plants
Inconel 625 Fasteners Price in India
Inconel 625 fasteners are premium-grade components designed for high-performance environments, and their pricing in India reflects their advanced material properties and manufacturing precision. The cost typically varies based on factors such as fastener type (bolts, nuts, washers, threaded rods, etc.), dimensions, quantity and any custom specifications required for critical applications.
At Unifit Metalloys Inc., we offer competitive pricing without compromising on quality. All fasteners are manufactured using certified raw materials and comply with international standards like ASTM B446. For accurate pricing, bulk order discounts or custom project requirements, get in touch with our sales team.
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