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Incoloy 925 Nuts Manufacturer & Exporter in India

Explore Incoloy 925 Nuts 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 Nuts?

Incoloy 925 nuts are high-strength, corrosion-resistant fasteners manufactured from nickel-iron-chromium alloy UNS N09925, conforming to ASTM B805. This precipitation-hardenable alloy is engineered for exceptional resistance to stress corrosion cracking, pitting, and crevice corrosion in aggressive environments containing chlorides, sulfides, and acids.

Incoloy 925 nuts are widely specified for critical bolted joints in oil & gas, marine, and chemical processing industries, especially where sour (H2S) service and high mechanical strength are required. The alloy’s balanced composition of nickel, chromium, molybdenum, copper, and titanium ensures reliable performance in both subsea and topside applications.

Quick Specifications

MaterialIncoloy 925
UNS NumberN09925
DIN Number2.4858
Material StandardASTM B805
Nut Standard (Metric)DIN 934 / ISO 4032
Nut Standard (Inch)ASME B18.2.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength760 MPa (110 ksi) min
Yield Strength450 MPa (65 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 Screws, 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 Screws
Incoloy 925 Washers
Incoloy 925 Studs
Incoloy 925 Threaded Rods

Technical Data

Incoloy 925 Nuts Dimensions, Sizes & Thread Standards

Incoloy 925 Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread pitches and heavy hex patterns available. Inch dimensions per ASME B18.2.2. All Incoloy 925 nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards before

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)Pitch (mm)A/F (mm)Height (mm)
M61.0105.0
M81.25136.5
M101.5178.0
M121.751910.0
M162.02413.0
M202.53016.0
M243.03619.0
M303.54624.0
M364.05529.0
M424.56534.0
M485.07538.0
M565.58545.0
M646.09551.0

Dimensional & Material Standards

StandardCoversThread
DIN 934Hex nutsMetric
ISO 4032Hex nutsMetric
ASME B18.2.2Hex & heavy hex nutsUNC/UNF
ISO 2320Prevailing torque nutsMetric
ASME B16.5Flange nutsUNC
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 Nuts 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)22.0% min
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 Nuts

Ni + Cr — Corrosion & SCC Resistance
The high nickel and chromium content in Incoloy 925 provides outstanding resistance to chloride-induced stress corrosion cracking and pitting, making these nuts ideal for sour gas and marine environments.
Mo + Cu — Acid & Reducing Media Protection
Molybdenum and copper enhance resistance to reducing acids and localized corrosion, ensuring reliable nut performance in chemical process and oilfield applications.
Ti — Precipitation Hardening
Titanium enables precipitation hardening, delivering high mechanical strength and maintaining ductility even after long-term service at elevated temperatures.

Fastener Performance

Incoloy 925 Nuts Mechanical Properties & Torque Reference

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

Nut SizeProof Load (kN)Recommended Torque (Nm)
M1262110
M16120270
M20190540
M24275950
M304301900
M366203200
M428505000
M4811507200
?? Anti-galling: Always use nickel-based anti-seize on Incoloy 925 nuts. Lubricated torque values assume K=0.15. Avoid copper-based lubricants to prevent galvanic corrosion.

Industry Applications

Incoloy 925 Nuts Applications — Industries & End Uses

Incoloy 925 Nuts 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 nuts are the preferred choice for subsea Christmas tree assemblies, wellhead flanges, and BOP stacks where NACE MR0175 compliance and resistance to H2S-induced stress corrosion cracking are critical. Used in conjunction with Incoloy 925 stud bolts for complete sour service integrity.
Hex nuts and heavy hex nuts for splash zone connections, riser clamps, and marine pump assemblies where resistance to pitting, crevice corrosion, and seawater exposure is required for long-term reliability.
Flange nut sets for pressure vessel closures, heat exchanger channel covers, and reactor nozzles in environments containing sulfuric, phosphoric, or organic acids where stainless steel fasteners fail.
Nuts for flue gas desulphurisation (FGD) absorber towers, HRSG ducting, and gas turbine exhaust flange assemblies where high strength and resistance to chloride-laden condensate are essential.

Incoloy 925 Nuts Standards & International Certifications

Incoloy 925 Nuts 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 934 ISO 4032 ASME B18.2.2 IS 1364 IS 1367
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 925 Nuts — 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
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Answers for Buyers

Incoloy 925 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 925 Nuts 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 nuts selection and pricing.
Incoloy 925 hex nuts are available to DIN 934 (metric), ISO 4032, and ASME B18.2.2 (inch hex and heavy hex). Prevailing torque and flange nuts can be supplied to ISO 2320 and ASME B16.5. Custom thread forms (UNC, UNF, BSW, BSF) are available on request with short lead times.
Use nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on all Incoloy 925 nuts and bolts. Apply to threads and bearing surfaces to prevent galling. Do not use copper-based anti-seize to avoid galvanic corrosion in chloride or sour environments.
Yes – Incoloy 925 nuts are fully compliant with NACE MR0175/ISO 15156 for sour service. Their high nickel and chromium content, combined with precipitation hardening, provides excellent resistance to H2S-induced stress corrosion cracking and sulfide stress cracking.
No MOQ for standard sizes (M12-M36) available ex-stock – we supply from single pieces for urgent requirements. Custom sizes or non-standard threads have an MOQ of 10 kg. Price breaks are available at 50 pcs, 200 pcs, and 500 pcs.

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