+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

Incoloy 925 Studs Manufacturer & Exporter in India

Explore Incoloy 925 Studs Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
Request a Quote
View Products

-196

Min Temp

870

Max Temp

🌡

870

Suitable for continuous service up to approximately 870°C under typical operating conditions.

⚡

620

Typical tensile strength around 620 MPa depending on product form and heat treatment.

🛡

Very Good

Very Good corrosion resistance in a wide range of industrial environments.

⚖

8

Typical density is approximately 8.0 g/cm³.

Product Overview

What are Incoloy 925 Studs?

Incoloy 925 studs are high-strength nickel-iron-chromium alloy fasteners manufactured from UNS N09925 bar stock in accordance with ASTM B805. This precipitation-hardenable alloy is engineered for exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion in aggressive chloride and sour (H2S) environments. The addition of molybdenum, copper, and titanium provides a unique combination of mechanical strength and corrosion resistance, making Incoloy 925 studs the preferred choice for critical bolted joints in oil & gas, marine, and chemical processing applications.

Incoloy 925 studs are NACE MR0175/ISO 15156 compliant for sour service and are widely specified for subsea wellhead, downhole, and topside equipment where both high strength and resistance to sulfide stress cracking are mandatory.

Quick Specifications

MaterialIncoloy 925
UNS NumberN09925
DIN Number2.4858
Material StandardASTM B805
Stud Standard (Metric)DIN 976 / ISO 898-1
Stud Standard (Inch)ASME B16.5 / B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M72 / ¼"-3"
Tensile Strength760 MPa (110 ksi) min
Yield Strength517 MPa (75 ksi) min
HardnessMax 35 HRC / 300 HB
? All material certified by NABL-accredited laboratory. PMI and hardness survey available on request.

Complete the Fastener Set

Other Incoloy 925 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Incoloy 925 fastener range from certified iron-nickel-chromium alloy bar stock, including Incoloy 925 Bolts, Incoloy 925 Nuts, Incoloy 925 Screws, Incoloy 925 Washers, and Incoloy 925 Threaded Rods. All Incoloy 925 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Incoloy 925 Bolts
Incoloy 925 Nuts
Incoloy 925 Screws
Incoloy 925 Washers
Incoloy 925 Threaded Rods

Technical Data

Incoloy 925 Studs Dimensions, Sizes & Thread Standards

Incoloy 925 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (metric) / ASME B16.5 (inch). Custom cut lengths available in 5mm increments. Inch dimensions per B16.5/B18.31.2 for flange and general bolting. All Incoloy 925 studs dimensions are verified against applicable DIN, ISO, and ASME

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.01820200
M81.252225250
M101.52630300
M121.753035400
M162.03840500
M202.54450600
M243.05460600
M303.56670800
M364.078801000
M424.5901001000
M485.01021201200
M565.51141401500
M646.01261602000
M726.01381802000

Dimensional & Material Standards

StandardCoversThread
DIN 976Threaded rods & studsMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous thread studsUNC/UNF
ISO 898-1Mechanical propertiesMetric
MSS SP-75High-pressure studsUNC
Material StandardRequirement
ASTM B805Bar/rod - UNS N09925
ASTM F467Fastener mechanical
NACE MR0175Sour service =35 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 925 Chemical Composition

Incoloy 925 Studs are produced from an iron-nickel-chromium alloy with controlled nickel (30–46%), chromium (19–23%), and molybdenum content per ASTM. Nickel and chromium together resist high-temperature oxidation to 1093°C in 800H grades, while molybdenum and copper additions in Incoloy 825 provide sulfuric and phosphoric acid resistance.

Chemical Composition per ASTM B805

ElementComposition (%)
Nickel (Ni)38.0-46.0%
Chromium (Cr)19.5-23.5%
Iron (Fe)22.0-27.0%
Molybdenum (Mo)2.5-3.5%
Copper (Cu)1.5-3.0%
Titanium (Ti)1.9-2.4%
Aluminium (Al)0.1% max
Manganese (Mn)1.0% max
Silicon (Si)0.5% max
Carbon (C)0.03% max
Sulfur (S)0.03% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Incoloy 925 Alloy Composition Matters for Studs

Ni-Cr-Fe Matrix — Sour Service Resistance
The balanced nickel-chromium-iron matrix of Incoloy 925 provides outstanding resistance to sulfide stress cracking and chloride-induced corrosion, making it ideal for sour gas and seawater-exposed bolted joints.
Mo & Cu — Pitting & Acid Resistance
Molybdenum and copper additions enhance resistance to pitting, crevice corrosion, and attack by reducing acids, ensuring long-term integrity of stud bolts in aggressive chemical and marine environments.
Ti — Precipitation Hardening
Titanium enables precipitation hardening, delivering high tensile and yield strength without compromising ductility or corrosion resistance, critical for high-load flange and pressure vessel connections.

Fastener Performance

Incoloy 925 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 925 Studs per ASTM. Incoloy 925 studs achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12957634
M1623018482
M20460368132
M24800640192
M3016001280305
M3628002240445
M4245003600610
M4867005360800
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Do not use copper-based anti-seize on nickel alloys.

Industry Applications

Incoloy 925 Studs Applications — Industries & End Uses

Incoloy 925 Studs from RealBolt are specified across petrochemical furnaces, chemical processing, nuclear, and power generation where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Incoloy 925 studs and nuts are specified for ASME B16.5/B16.47 flanged wellhead connections, subsea Christmas trees, and downhole completion equipment. Fully NACE MR0175 compliant for H2S sour service and chloride-laden environments. Used by major operators for critical flange joints and pressure vessel closures.
Stud bolts for offshore platform riser flanges, splash zone pipe supports, and marine heat exchanger assemblies where resistance to seawater pitting and crevice corrosion is essential for long-term reliability.
Stud sets for pressure vessel nozzles, heat exchanger channel covers, and reactor closures in environments containing organic acids, chlorides, and reducing acids where stainless steel fasteners fail.
Stud bolts for flue gas desulphurisation (FGD) absorber towers, HRSG ducting, and gas turbine exhaust flange connections exposed to high-chloride, acidic, and cyclic thermal conditions.

Incoloy 925 Studs Standards & International Certifications

Incoloy 925 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 Incoloy 925 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 925 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.
022-6743-7972
+91 90226 36025
Email Us

Answers for Buyers

Incoloy 925 Studs — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 925 Studs from RealBolt — covering grade differences, ASTM B408/B425 standards, oxidation limits, acid resistance, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on Incoloy 925 studs selection and pricing.
Incoloy 925 stud bolts are available to DIN 976 (metric), ASME B16.5 (inch flange studs), ASME B18.31.2 (continuous thread), and ISO 898-1 for mechanical properties. Custom thread forms (UNC, UNF, BSW, BSPP) and cut lengths are available on request with typical lead times of 2-3 weeks.
Always use a nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on Incoloy 925 studs and nuts. Apply to threads and nut bearing faces to prevent galling and facilitate disassembly. Do not use copper-based anti-seize due to galvanic corrosion risk in chloride and sour environments.
Yes – Incoloy 925 is specifically engineered for sour gas (H2S) and seawater service. It is fully NACE MR0175/ISO 15156 compliant and resists sulfide stress cracking, pitting, and crevice corrosion in chloride-rich and acidic environments. Widely used in subsea, offshore, and downhole applications.
No MOQ for standard sizes (M12-M36) held in stock – single pieces can be supplied for urgent maintenance. Custom sizes and thread forms typically require a 10 kg minimum. Flange stud sets are supplied per set with no minimum. Quantity discounts at 50, 200, and 500 pieces.

Industrial Cities We Serve:

  • Ahmedabad
  • Aurangabad
  • Bengaluru
  • Chennai
  • Coimbatore
  • Faridabad
  • Gandhidham
  • Greater Noida
  • Gurugram
  • Hazira
  • Hosur
  • Hyderabad
  • Jamnagar
  • Jamshedpur
  • Ludhiana
  • Mumbai
  • Mundra
  • Mysuru
  • Nagpur
  • Nashik
  • Navi Mumbai
  • Noida
  • Pune
  • Rajkot
  • Sanand
  • Surat
  • Thane
  • Tiruppur
  • Vadodara
  • Visakhapatnam

Countries We Export To:

  • US
  • Canada
  • Mexico
  • Germany
  • UK
  • France
  • Italy
  • Spain
  • Netherlands
  • Belgium
  • Poland
  • Sweden
  • Norway
  • Denmark
  • Turkey
  • UAE
  • Saudi Arabia
  • Qatar
  • Oman
  • Kuwait
  • Bahrain
  • South Africa
  • Egypt
  • Nigeria
  • Australia
  • New Zealand
  • Singapore
  • Malaysia
  • Indonesia
  • Thailand
  • Vietnam
  • South Korea
  • Japan
  • Brazil