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Inconel 625 Studs Manufacturer & Exporter in India

Explore Inconel 625 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-200

Min Temp

1200

Max Temp

🌡

1200

Suitable for continuous service up to approximately 1200°C under typical operating conditions.

⚡

760

Typical tensile strength around 760 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.4

Typical density is approximately 8.4 g/cm³.

Product Overview

What are Inconel 625 Studs?

Inconel 625 studs are fully threaded or double-end threaded fasteners manufactured from UNS N06625 bar stock conforming to ASTM B446. The alloy derives its exceptional strength through solid-solution strengthening provided by molybdenum (8-10%) and niobium (3.15-4.15%), achieving a minimum tensile strength of 758 MPa in the annealed condition without any precipitation hardening treatment.

With a PREN exceeding 51, Inconel 625 studs resist chloride-induced pitting and crevice corrosion in seawater environments that would rapidly destroy standard stainless steel fasteners. These studs are specified under NACE MR0175/ISO 15156 for sour-service flange assemblies, subsea wellhead connections, offshore structural joints, and high-temperature chemical process equipment worldwide.

Quick Specifications

MaterialInconel 625
UNS NumberN06625
DIN Number2.4856
Material StandardASTM B446
Stud Standard (Metric)DIN 976-1 / ISO 888
Stud Standard (Inch)ASME B16.5 / ASME B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength758 MPa (110 ksi) min
Yield Strength414 MPa (60 ksi) min
HardnessMax 35 HRC / 220 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel 625 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Inconel 625 fastener range from certified nickel-chromium superalloy bar stock, including Inconel 625 Bolts, Inconel 625 Nuts, Inconel 625 Screws, Inconel 625 Washers, and Inconel 625 Threaded Rods. All Inconel 625 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Inconel 625 Bolts
Inconel 625 Nuts
Inconel 625 Screws
Inconel 625 Washers
Inconel 625 Threaded Rods

Technical Data

Inconel 625 Studs Dimensions, Sizes & Thread Standards

Inconel 625 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976-1 (metric fully threaded studs) / ASME B16.5 (flange stud bolts) / ASME B18.31.2 (inch studs). Custom lengths available. Double-end and tap-end configurations supplied to order. All Inconel 625 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Bolt Dimensions - Metric (DIN 976-1 / ISO 888)

Size (M)Pitch (mm)Shank Dia (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.06.01820200
M81.258.02225250
M101.510.02630300
M121.7512.03035400
M162.016.03845500
M202.520.04655600
M243.024.05465700
M303.530.06680800
M364.036.0781001000
M424.542.0901201200
M485.048.01021401500
M565.556.01181601800
M646.064.01341802000
M726.072.01502002500
M806.080.01662202500
M1006.0100.02062603000

Dimensional & Material Standards

StandardCoversThread
DIN 976-1Metric stud bolts, fully threadedMetric
ISO 888Bolts, screws and studs - lengthsMetric
ASME B16.5Stud bolts for pipe flangesUNC
ASME B18.31.2Continuous and double-end studsUNC/UNF
MSS SP-75High-pressure stud bolt setsUNC
ASME B1.1Unified inch screw threadsUNC/UNF
ASME B1.13MMetric screw threadsMetric
Material StandardRequirement
ASTM B446Bar/rod - UNS N06625
ASTM F467Fastener mechanical properties
NACE MR0175Sour service =35 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel 625 Chemical Composition

Inconel 625 Studs are manufactured from a nickel-chromium superalloy containing nickel (72% min), chromium (14–17%), and iron (6–10%). Each element is precisely controlled per ASTM — nickel provides chloride SCC immunity, chromium drives high-temperature oxidation resistance, and iron balances structural stability and alloy cost.

Chemical Composition per ASTM B446

ElementComposition (%)
Nickel (Ni)58.0% min
Chromium (Cr)20.0-23.0%
Molybdenum (Mo)8.0-10.0%
Niobium + Ta (Nb+Ta)3.15-4.15%
Iron (Fe)5.0% max
Carbon (C)0.10% max
Manganese (Mn)0.50% max
Silicon (Si)0.50% max
Aluminium (Al)0.40% max
Cobalt (Co)1.0% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 625 Alloy Composition Matters for Studs

Mo (8–10%) — Crevice & Pitting Immunity
Molybdenum elevates the PREN of Inconel 625 to 51+, providing complete resistance to crevice corrosion in the thread engagement zone and under nut bearing faces — the most vulnerable areas on a stud bolt in immersed seawater service.
Nb (3.15–4.15%) — Sensitisation Prevention
Niobium ties up carbon and prevents intergranular carbide precipitation during welding or elevated-temperature service. Inconel 625 studs retain full corrosion resistance in the heat-affected zone of welded assemblies without post-weld heat treatment.
Solid-Solution Strengthening — No Age Hardening
Unlike age-hardened alloys such as Inconel 718, alloy 625 achieves its 758 MPa tensile strength through solid-solution mechanisms alone. This eliminates the risk of hydrogen embrittlement associated with high-hardness precipitation-hardened studs in sour-service environments.

Fastener Performance

Inconel 625 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Inconel 625 Studs per ASTM. Inconel 625 studs achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud Bolt Torque Reference - Metric (Lubricated & Dry)

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12856831
M1620516475
M20410328120
M24715572174
M3014301144278
M3624901992404
M4239803184558
M4859004720732
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or Bostik Never-Seez Pure Nickel). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloy studs.

Industry Applications

Inconel 625 Studs Applications — Industries & End Uses

Inconel 625 Studs from RealBolt are specified across oil and gas, aerospace, chemical processing, and power generation where excellent corrosion resistance and 760 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Inconel 625 stud bolt sets are the standard specification for ASME B16.5 and B16.47 flanged connections on subsea wellheads, BOP stacks, Christmas tree assemblies, and topside sour-service piping. Fully compliant with NACE MR0175/ISO 15156 at hardness =35 HRC. Approved under Shell DEP and ExxonMobil EMSP specifications.
Double-end and fully threaded studs for offshore platform structural joints, splash-zone pipe clamps, marine heat exchanger channel covers, and riser support connections where continuous seawater exposure demands PREN 51+ performance. No coating or cathodic protection required for ambient-temperature seawater immersion.
Stud bolt sets for pressure vessel nozzle connections, reactor closure flanges, and heat exchanger channel covers (TEMA Class B/C) in phosphoric acid, hydrofluoric acid, organic acid, and mixed halide environments. Specified where duplex stainless and super duplex grades have reached their corrosion resistance limits.
Inconel 625 studs are used in aircraft exhaust manifold connections, thrust reverser attachment points, and nacelle structural joints requiring simultaneous oxidation resistance to 980°C and high fatigue strength under cyclic thermal loading. Manufactured to AMS 5666 where required.

Inconel 625 Studs Standards & International Certifications

Inconel 625 Studs from RealBolt Engineering Industries are manufactured to internationally recognised fastener dimensional standards covering thread form, tolerances, strength grades, and quality requirements. Every batch ships with EN 10204 MTC 3.1/3.2, PMI (XRF), NACE MR0175/ISO 15156, and NABL-accredited lab reports — available on request for all orders.
Standards
DIN 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1364 IS 1367
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Inconel 625 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Inconel 625 Studs — for competitive pricing, EN 10204 MTC 3.1/3.2 documentation, and fast Mumbai dispatch. Standard sizes are ex-stock; custom dimensions accepted with 2–3 week lead time. Request your quote today.
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Answers for Buyers

Inconel 625 Studs — Frequently Asked Questions

Browse expert answers to common questions about Inconel 625 Studs from RealBolt — covering ASTM standards, max service temperature, corrosion resistance, available sizes, lead times, and MTC certification. Contact our technical team directly for project-specific guidance on Inconel 625 studs selection and pricing.
Inconel 625 studs are available in three standard configurations: fully threaded studs (DIN 976-1 / ASME B18.31.2), double-end studs with equal thread lengths, and tap-end studs with one short and one long threaded end. ASME B16.5 flange stud bolts with heavy hex nuts are supplied as matched sets for Class 150 through Class 2500 flanges. Custom configurations including reduced shank, waisted shank, and metric-to-inch cross-thread studs are available on request with 15 working day lead time.
Inconel 625 studs retain useful mechanical properties up to approximately 980°C in oxidising atmospheres. At 650°C, tensile strength remains above 550 MPa. However, prolonged exposure between 650°C and 750°C can cause precipitation of the delta phase, which reduces ductility over time. For continuous service above 700°C, Inconel 718 or Waspaloy studs may be more appropriate. Consult our engineering team for high-temperature application selection.
Yes – Inconel 625 studs are listed in NACE MR0175/ISO 15156-3 Table A.3 for use in H2S-containing sour service environments. Compliance requires hardness =35 HRC (220 HB maximum), which is inherent in the annealed condition of alloy 625. Each batch is supplied with a hardness survey report. Cold-worked or work-hardened material is not acceptable for sour service and is not supplied without explicit customer instruction and engineering review.
Yes – we supply complete stud and nut sets with Inconel 625 heavy hex nuts (ASTM B446 / ASME B18.2.2) or Inconel 625 hex nuts (DIN 934) as matched heats under a single EN 10204 3.1 MTC. For ASME B16.5 flange assemblies, sets are supplied as two heavy hex nuts per stud bolt. Mixed-material sets pairing Inconel 625 studs with Monel 400 or Hastelloy C276 nuts are available for specific galvanic compatibility requirements.

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  • Ahmedabad
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  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
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  • Jamnagar
  • Jamshedpur
  • Ludhiana
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