ASME B18.31.2 · ASTM B166
Inconel Stud Bolts
Fully threaded and double-end stud bolts engineered for high-pressure ASME B16.5 flange joints in severe thermal service.
ASTM B166 / B446
High-Temp Performance
Expertise & Manufacturing Reliability
Global Supplier of High-Performance Inconel Fasteners
Stud Bolt India is an ISO 9001:2015 certified manufacturer and international exporter of high-density nickel-chromium alloy fasteners. Engineered to resist extreme oxidation, thermal stress, and severe chemical corrosion, our ASTM B166 and ASME SB166 Inconel fasteners are designed for high-stakes industrial environments.
Utilizing precision hot forging for high-tensile structural integrity and advanced CNC thread rolling to prevent stress concentration, we produce Inconel 600, 601, 625, and 718 bolting products. Each shipment is supplied with full material traceability, EN 10204 3.1 certification, and complete dimensional compliance reports for global EPC buyers.
Thermal Strength
Retains yield strength in service temperatures exceeding 1000°C (1830°F).
Corrosion Immunity
Resists chloride-ion stress cracking, pitting, and reducing acid media.
Comprehensive Product Line
Precision Inconel Fastener Types
Engineered to exact ANSI, ASME, DIN, and ISO standards for critical equipment assembly.
ASME B18.2.1 · DIN 931 / 933
Inconel Hex & Heavy Hex Bolts
Precision forged hex bolts with clean cut or rolled threads for heavy industrial machinery, turbines, and reactors.
ASME B18.2.2 · DIN 934
Inconel Hex & Heavy Hex Nuts
High-strength alloy nuts engineered to prevent galling under extreme torque and high operating temperatures.
DIN 912 · ISO 4762 · ASME B18.3
Inconel Socket Head Screws
Countersunk, button head, and socket cap screws providing compact high-tensile fastening in tight spatial envelopes.
DIN 125 · DIN 127 · ASME B18.21.1
Inconel Washers
Plain, Belleville, and heavy-duty spring washers offering uniform clamping force distribution and thermal expansion compensation.
DIN 975 · DIN 976 · ASTM B166
Inconel Threaded Rods
All-thread bars manufactured up to 3 meters (10 feet) in continuous thread length for high-temperature pipe support systems.
Engineering Specifications
Inconel Grade Technical Data
Comprehensive metallurgical specifications for procurement managers and design engineers.
| Inconel Grade | UNS Designation | Tensile Strength (MPa / PSI) | Yield Strength (0.2% Offset) | Max Operating Temp | Key Applications |
|---|---|---|---|---|---|
| Inconel 600 | UNS N06600 | 655 MPa / 95,000 PSI | 310 MPa / 45,000 PSI | 1093°C / 2000°F | Furnace components, chemical processing, nuclear vessels |
| Inconel 601 | UNS N06601 | 550 MPa / 80,000 PSI | 205 MPa / 30,000 PSI | 1250°C / 2280°F | Thermal processing equipment, petrochemical reformers |
| Inconel 625 | UNS N06625 | 930 MPa / 135,000 PSI | 517 MPa / 75,000 PSI | 982°C / 1800°F | Marine hardware, subsea equipment, flare stacks |
| Inconel 718 | UNS N07718 | 1100 MPa / 160,000 PSI | 750 MPa / 108,000 PSI | 704°C / 1300°F | Gas turbines, aerospace engines, high-strength bolting |
Chemical Composition Analysis (%)
| Grade | Ni (Nickel) | Cr (Chromium) | Fe (Iron) | Mo (Molybdenum) | Nb (Niobium) | C (Carbon) |
|---|---|---|---|---|---|---|
| Inconel 600 | 72.0 min | 14.0 – 17.0 | 6.0 – 10.0 | — | — | 0.15 max |
| Inconel 601 | 58.0 – 63.0 | 21.0 – 25.0 | Remainder | — | — | 0.10 max |
| Inconel 625 | 58.0 min | 20.0 – 23.0 | 5.0 max | 8.0 – 10.0 | 3.15 – 4.15 | 0.10 max |
| Inconel 718 | 50.0 – 55.0 | 17.0 – 21.0 | Remainder | 2.8 – 3.3 | 4.75 – 5.50 | 0.08 max |
Manufactured strictly in according to ASTM B166, ASTM B446, ASME SB166, and custom international client drawings.
Quality Management & E-E-A-T
Rigorous Quality Testing & Material Traceability
At Stud Bolt India, every batch of Inconel raw material undergoes stringent quality verification prior to forging and machining. We maintain zero-defect standards to ensure maximum safety in hazardous operations.
- 100% Positive Material Identification (PMI Testing)
- EN 10204 3.1 Material Test Reports (MTR) provided
- Tensile, Yield, Hardness & Elongation verification
- Microstructure & Grain Size Analysis
- Third-Party Inspection (TPI via SGS, TUV, BV)
- Thread Gauge Fitment to ASME B1.1 / B1.13M
Export Compliance
Seaworthy Export Packaging & Global Logistics
We deliver damaged-free, moisture-protected shipments to project sites worldwide.
Packaging Safeguards
- Heavy-Duty Fumigated Wooden Crates (ISPM 15)
- Moisture-Barrier Vacuum Shrink Wrapping
- Individual Thread Plastic Cap Protection
- Color-Coded Heat Number Stamping
Other High-Nickel Alloy Fasteners
- Inconel X-750 Fasteners
- Monel 400 & K-500 Fasteners
- Hastelloy C276 & C22 Fasteners
- Titanium Grade 2 & Grade 5 Fasteners
Global Reach
High-Temperature Industry Applications
Serving heavy engineering sectors across the Middle East, Europe, North America, and Asia-Pacific.
Petrochemical Processing
Inconel 600/625 studs for hydrocracker vessels, heat exchangers, and flare tips.
Offshore & Subsea Oil & Gas
High-strength Inconel 718 bolts resisting sour gas (H2S) stress corrosion cracking.
Aerospace & Turbines
Inconel 718 / X-750 socket cap screws for jet engine exhausts and gas turbines.
Marine Engineering
Inconel 625 fasteners for seawater handling systems and marine propulsion shafts.
Technical FAQ
Frequently Asked Questions
What is the difference between Inconel 600, 625, and 718 fasteners?
Inconel 600 is optimized for high-temperature oxidation resistance. Inconel 625 offers superior resistance to pitting and crevice corrosion in chloride environments due to added Molybdenum and Niobium. Inconel 718 is precipitation-hardened, providing exceptional tensile strength (up to 1100 MPa) for gas turbines and subsea applications.
What standards do your Inconel fasteners conform to?
Our Inconel fasteners are produced in strict accordance with ASTM B166, ASTM B446, ASME SB166, ASME SB446, DIN 931, DIN 933, DIN 934, DIN 912, and ASME B18.2.1 / B18.2.2 standards.
Do you supply EN 10204 3.1 material test certificates?
Yes. Every export shipment includes full EN 10204 3.1 inspection certificates displaying complete heat number traceability, chemical composition, and physical test reports.
What is your manufacturing capacity for custom sizes?
We produce metric standard sizes from M3 to M100 and imperial sizes from 3/8" to 4" diameter. Custom lengths, non-standard pitch threads, and client drawing parts are manufactured via CNC turning and hot forging.
Need an Immediate Quote for Inconel Fasteners?
Share your material grade, dimensions, coating, and project destination. Our technical sales engineering team will provide a comprehensive commercial quote within 24 hours.