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Incoloy 925 Screws Manufacturer & Exporter in India

Explore Incoloy 925 Screws Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-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 Screws?

Incoloy 925 screws are high-strength nickel-iron-chromium alloy fasteners manufactured from UNS N09925 bar stock, conforming to ASTM B805. The alloy is precipitation-hardenable, with additions of molybdenum, copper, titanium, and aluminum, providing excellent resistance to stress corrosion cracking, pitting, and crevice corrosion in aggressive environments, especially those containing sulfides and chlorides.

Incoloy 925 screws are widely specified for critical bolted joints in oil & gas, marine, and chemical processing industries, where both high mechanical strength and resistance to sour gas (H2S) and chloride-induced corrosion are essential. All fasteners are supplied with full traceability and NACE MR0175/ISO 15156 compliance for sour service applications.

Quick Specifications

MaterialIncoloy 925
UNS NumberN09925
DIN Number2.4858
Material StandardASTM B805
Screw Standard (Metric)DIN 912 / DIN 933 / ISO 4762
Screw Standard (Inch)ASME B18.3 / B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
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 Washers, Incoloy 925 Studs, 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 Washers
Incoloy 925 Studs
Incoloy 925 Threaded Rods

Technical Data

Incoloy 925 Screws Dimensions, Sizes & Thread Standards

Incoloy 925 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap), DIN 933 (full thread hex), ISO 4762. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.3 and B18.2.1. All Incoloy 925 screws dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Socket Head Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)Pitch (mm)Head Dia (mm)Head Ht (mm)Hex Socket (mm)Min L (mm)Max L (mm)
M61.0106.0510100
M81.25138.0612120
M101.51610.0816150
M121.751812.01020200
M162.02416.01425250
M202.53020.01730300
M243.03624.01940350
M303.54530.02250400
M364.05436.02760500
M424.56342.03280600
M485.07248.036100700
M565.58556.041120800
M646.09564.046140900

Dimensional & Material Standards

StandardCoversThread
DIN 912Socket head cap screwsMetric
DIN 933Hex screws, full threadMetric
ISO 4762Socket head cap screwsMetric
ASME B18.3Socket cap screwsUNC/UNF
ASME B18.2.1Hex screwsUNC/UNF
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 Screws 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)42.0-46.0%
Chromium (Cr)19.5-22.5%
Iron (Fe)Balance
Molybdenum (Mo)2.5-3.5%
Copper (Cu)1.5-3.0%
Titanium (Ti)1.9-2.4%
Aluminum (Al)0.1-0.5%
Manganese (Mn)1.0% max
Silicon (Si)0.5% max
Carbon (C)0.03% max
Sulfur (S)0.01% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Incoloy 925 Alloy Composition Matters for Screws

Ni-Cr-Fe Matrix — Corrosion & Strength
The nickel-iron-chromium base provides Incoloy 925 screws with a unique combination of high strength and resistance to both reducing and oxidizing acids, as well as chloride stress corrosion cracking.
Mo & Cu — Pitting and Sulfide Resistance
Molybdenum and copper enhance resistance to pitting, crevice corrosion, and attack by hydrogen sulfide, making these screws ideal for sour gas and marine applications.
Ti & Al — Precipitation Hardening
Titanium and aluminum enable precipitation hardening, delivering high yield and tensile strength without compromising ductility or corrosion resistance.

Fastener Performance

Incoloy 925 Screws Mechanical Properties & Torque Reference

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

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M8322513
M10645121
M121108831
M1627021662
M2054043297
M24930744140
M3018501480225
M3632002560325
?? 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 Incoloy 925 screws.

Industry Applications

Incoloy 925 Screws Applications — Industries & End Uses

Incoloy 925 Screws 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 screws are widely used in downhole tools, completion equipment, and subsea valve assemblies where resistance to H2S, CO2, and chlorides is critical. NACE MR0175 compliance ensures safe use in sour gas wells and offshore production systems.
Socket head and hex screws for marine riser flanges, splash zone supports, and seawater-cooled heat exchangers where pitting and crevice corrosion resistance is essential for long-term reliability.
Used in reactor closures, pressure vessel nozzles, and heat exchanger channel covers exposed to organic acids, chlorides, and mixed halide streams where stainless steel fasteners fail.
Screws for flue gas desulphurisation (FGD) scrubber internals, HRSG ducting, and gas turbine exhaust hardware where high strength and resistance to acidic condensates are required.

Incoloy 925 Screws Standards & International Certifications

Incoloy 925 Screws 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 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 6912 ISO 4762 ISO 10642 ASME B18.3 EN ISO 4762 IS 1367
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 925 Screws — 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

Incoloy 925 Screws — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 925 Screws 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 screws selection and pricing.
Incoloy 925 screws are available to DIN 912 (socket head cap), DIN 933 (hex full thread), ISO 4762, and ASME B18.3 (inch socket cap) or B18.2.1 (inch hex). Custom thread forms (UNC, UNF, BSW, BSF) and special lengths are available on request with a typical lead time of 2-3 weeks.
Use nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on all Incoloy 925 screw threads and bearing surfaces. This prevents galling and ensures correct preload. Do not use copper-based anti-seize due to galvanic corrosion risk in chloride or sour environments.
Yes – Incoloy 925 is specifically designed for sour gas (H2S) and marine environments, offering excellent resistance to sulfide stress cracking, pitting, and crevice corrosion. All screws are supplied to NACE MR0175/ISO 15156 requirements for oil & gas and offshore use.
No MOQ for standard sizes (M8-M24) held in stock – we supply from single pieces for urgent maintenance. Custom sizes or non-standard threads typically require a 10 kg minimum. Quantity price breaks are available 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