Tricon Steel & Alloys is a leading manufacturer, supplier, and exporter; we offer Inconel 625 Fasteners, renowned for their exceptional corrosion resistance and high-temperature performance.
Inconel 625 fasteners are a type of high-performance fastening solution renowned for their exceptional corrosion resistance, high tensile strength, and versatility across various applications. Composed primarily of nickel-chromium alloy with additions of molybdenum, niobium, and tantalum, these fasteners exhibit superb resistance to both oxidising and reducing environments, making them ideal for use in harsh conditions such as chemical processing, marine environments, aerospace applications, and high-temperature settings. The unique composition of Inconel 625 imparts excellent resistance to crevice corrosion, pitting, and stress-corrosion cracking, further enhancing its suitability for demanding industrial environments.
The exceptional mechanical qualities of Inconel 625 fasteners, such as their high tensile and yield strengths and good fatigue resistance, are one of their main selling points. These qualities allow them to endure heavy loads and vibrations without losing integrity. Because of their strength and resistance to corrosion, they are invaluable in demanding applications where durability and dependability are crucial. Furthermore, they resist high temperatures—up to 1,800°F or 982 °C. Inconel 625 fasteners are appropriate for use in high-temperature processing and combustion settings.
Inconel 625 fasteners undergo rigorous testing to ensure industry standards and specifications compliance. Common tests conducted on these fasteners include mechanical testing to assess tensile strength, yield strength, and elongation properties. Additionally, hardness tests are performed to evaluate the material's resistance to deformation under applied loads. Corrosion testing, such as salt spray testing and exposure to corrosive environments, is also carried out to validate the material's corrosion resistance performance. Furthermore, non-destructive testing methods like ultrasonic testing and magnetic particle inspection are employed to detect internal defects and ensure the integrity of the fasteners.
Aerospace, marine, chemical processing, oil and gas extraction, and power generation industries use Inconel 625 fasteners. They are frequently utilised in equipment like valves, pumps, flanges, and turbines—where dependable operation in corrosive and hot environments is crucial. Inconel 625 fasteners are the preferred option for demanding engineering applications because they are essential to maintaining industrial operations' safety, dependability, and efficiency—whether in chemical reactors, offshore drilling rigs, or aircraft engines.
Standard | ASTM B166 / ASME SB166 |
Bolt / Screw Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Nuts Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Washers Size | M3 – M56 | 3/6″ to 2″ | Custom Sizes |
Machine Screws Size | M1.6 – M12 |
Self Tapping Screw Size | No.2 – No. 14 |
Length | 3 mm to 200 mm |
Threads | UNF, BSW, BSF, METRIC, UNC, or as required |
Fasteners |
|
Form | Hex, Threading, Square, Round as per Gauge Etc. |
Raw materials Source | JSPL, Mukund Steel, Tata Steel, Dhamm Steel, Usha Martin,etc. |
Threads Configuration | ASME B1.1 2A/3A – 2B/3B Inch Unified Threads and B1.13M 6h-6G Metric Coarse Threads |
Certification | Dual Certified As per ASTM & ASME Codes |
Dimensions | DIN 931, 933, 934, 7991, 976, 125, ASME B18.2.1, B18.3 |
Threads | Unless otherwise specified, the threads shall be rolled or cut and tapped horizontally or vertically |
Test Certificate | as per EN 10204 / 3.1 Manufacturer Test Certificate |
Additional Certifications | PED 97/23/EC Certified, Merkblatt AD 2000 W2 Certified |
Production Process | M24-M100: hot forging , M2-M24: Cold Froging, for custom-made connecting element machining and CNC |
Types | Bolts, Nuts, Stud Bolts, Washers, Threaded Rod, Anchor Fasteners, Eye Bolt, Stud, Cotter Pin, Socket Screw, Fine Fasteners & Spares, Foundation Fasteners, Hexagon Castle Nuts, Hexagon Domed Cap Bolts, Hexagon Thin Nuts etc. |
Cold Forging
This initial process is a cold forging process used to produce a near net shape work billet. An important consideration in cold forging is the tendency for the bar tobolts Manufacturing Process buckle if its unsupported length to diameter ratio is too high. This ratio usually is limited to less than 4:1 but with suitable dies, therefore, cold forging is the most likely production method because bolts have a large head-to-shank ratio, they are longer than 1½ times their diameter, bolts have multiple diameters and finally require a geometrical shap
Thread rolling
The next process applied to the bottom of the work billet is a bulk deformation process known as "thread rolling". This type of cold-forging process is used bolts Manufacturing Processbecause cylindrical can easily have thread applied by rolling the work billet through two dies. The thread rolling process is usually chosen over machining because thread rolling provides higher production rates, more effective material usage, stronger thread due to work hardening and finally better fatigue resistance because the work billet undergoes compressive stresses during the rolling process.
Blackening and Galvanization
The final process induced on the now almost complete bolt is the application of an anti-corrosive layer, to stop oxidation. The usual process is called "blackening"; Either process chemically or physically coats the surface of ferrous metals, creating a strong barrier against humidity and corrosion. Hot Blackening is most popular & common blackening processes:
Hot Blackening
Hot blackening involves dipping the bolt into six different tanks. The bolt is usually "dipped" by automated part carriers for transportation between tanks. These tanks contain, in order, alkaline cleaner, water, caustic soda at 450°C to 500°C and finally the sealant, which is usually crude oil. The caustic soda bonds chemically to the surface of the metal, creating a porous base layer on the bolt.
STANDARD | UNS | WERKSTOFF NR. | EN | BS | GOST | OR | JIS | AFNOR |
Inconel 625 | N06625 | 2.4856 | NiCr22Mo9Nb | NA 21 | ХН75МБТЮ | ЭИ602 | NCF 625 | NC22DNB4M |
Grade |
C |
Mn |
Si |
Fe |
S |
Cr |
Cu |
Ni |
|
625 |
min. |
– |
– |
– |
Bal |
– |
21.0 |
– |
58.0 |
max. |
0.10 |
1.0 |
0.5 |
Bal |
0.015 |
25.0 |
1.0 |
63.0 |
Grade |
Tensile Strength (MPa) min |
Yield Strength 0.2% Proof (MPa) min |
Elongation (% in 50mm) min |
Hardness |
|
Rockwell B (HR B) max |
Brinell (HB) max |
||||
625 |
Psi – 95,000 , MPa -655 |
Psi – 45,000 , MPa – 310 |
40 |
– |
– |
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