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Nimonic 263 Bolts Manufacturer & Exporter in India

Explore Nimonic 263 Bolts 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 Nimonic 263 Bolts?

Nimonic 263 bolts are high-strength, nickel-cobalt-chromium-molybdenum alloy fasteners manufactured from UNS N07263 bar stock conforming to ASTM B637. Designed for service at elevated temperatures up to 800°C, Nimonic 263 bolts offer a unique combination of excellent oxidation resistance, high tensile and creep-rupture strength, and good weldability. The alloy’s controlled additions of titanium and aluminum enable precipitation hardening, while molybdenum and cobalt enhance solid-solution strengthening.

Nimonic 263 bolts are widely specified in gas turbine engines, petrochemical reactors, and high-temperature pressure vessels where both mechanical integrity and resistance to thermal fatigue are critical. They are supplied with full traceability and certification to international aerospace and industrial standards.

Quick Specifications

MaterialNimonic 263
UNS NumberN07263
DIN Number2.4650
Material StandardASTM B637
Bolt Standard (Metric)DIN 931 / DIN 933 / ISO 4014
Bolt Standard (Inch)ASME B18.2.1
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength930 MPa (135 ksi) min
Yield Strength585 MPa (85 ksi) min
HardnessMax 32 HRC / 300 HB
? All material certified by NABL-accredited laboratory. PMI and hardness survey available on request.

Complete the Fastener Set

Other Nimonic 263 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 263 fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 263 Nuts, Nimonic 263 Screws, Nimonic 263 Washers, Nimonic 263 Studs, and Nimonic 263 Threaded Rods. All Nimonic 263 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 263 Nuts
Nimonic 263 Screws
Nimonic 263 Washers
Nimonic 263 Studs
Nimonic 263 Threaded Rods

Technical Data

Nimonic 263 Bolts Dimensions, Sizes & Thread Standards

Nimonic 263 Bolts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 931 (partial thread) / DIN 933 (full thread) / ISO 4014. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.2.1. All Nimonic 263 bolts dimensions are verified against applicable DIN, ISO, and ASME

Hex Bolt Dimensions - Metric (DIN 931 / ISO 4014)

Size (M)Pitch (mm)A/F (mm)Head Ht (mm)Min L (mm)Max L (mm)
M61.0104.010200
M81.25135.312250
M101.5176.416300
M121.75197.520400
M162.02410.025500
M202.53012.530600
M243.03615.040600
M303.54618.750800
M364.05522.5601000
M424.56526.0801000
M485.07530.01001200
M565.58535.01201500
M646.09540.01402000

Dimensional & Material Standards

StandardCoversThread
DIN 931Hex bolts, partial threadMetric
DIN 933Hex bolts, full threadMetric
ISO 4014Hex head screws, partialMetric
ISO 4017Hex head screws, fullMetric
ASME B18.2.1Hex & heavy hex boltsUNC/UNF
ASME B16.5Stud bolts for flangesUNC
MSS SP-75Stud bolts, high-pressureUNC
Material StandardRequirement
ASTM B637Bar/rod - UNS N07263
AMS 5872Sheet/plate/strip
AMS 5873Bar/forgings
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 263 Chemical Composition

Nimonic 263 Bolts are manufactured from a precipitation-hardened nickel-chromium-cobalt superalloy with titanium and aluminium additions per AMS and BS HR specifications. These elements form the gamma-prime (Ni₃Al,Ti) precipitate phase that delivers creep rupture strength above 700°C — a performance level unachievable with standard nickel or stainless alloys.

Chemical Composition per ASTM B637

ElementComposition (%)
Nickel (Ni)49.0 min
Cobalt (Co)19.0-21.0
Chromium (Cr)19.0-21.0
Molybdenum (Mo)5.6-6.1
Titanium (Ti)1.9-2.4
Aluminum (Al)0.5-0.6
Iron (Fe)0.7 max
Carbon (C)0.04-0.08
Silicon (Si)0.4 max
Manganese (Mn)0.6 max
Boron (B)0.005-0.015
Zirconium (Zr)0.02-0.06
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 263 Alloy Composition Matters for Bolts

Co & Cr (19–21%) — Oxidation & Hot Corrosion Resistance
Cobalt and chromium provide Nimonic 263 bolts with outstanding resistance to oxidation and hot corrosion at temperatures up to 800°C, making them ideal for gas turbine and exhaust flange bolting.
Mo (5.6–6.1%) — Solid Solution Strengthening
Molybdenum enhances the alloy’s strength and creep resistance, ensuring Nimonic 263 bolts maintain preload and integrity under sustained high-temperature service.
Ti & Al (1.9–2.4%, 0.5–0.6%) — Precipitation Hardening
Titanium and aluminum enable age-hardening, allowing Nimonic 263 bolts to achieve high tensile and yield strengths after heat treatment, with excellent ductility and weldability.

Fastener Performance

Nimonic 263 Bolts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 263 Bolts per ASTM. Nimonic 263 bolts achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Bolt SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M121108838
M1626020892
M20520416148
M24900720215
M3018001440340
M3631202496495
M4249803984682
M4873805904897
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37 or equivalent). Lubricated values assume K=0.15. Avoid copper-based anti-seize on nickel alloys.

Industry Applications

Nimonic 263 Bolts Applications — Industries & End Uses

Nimonic 263 Bolts from RealBolt are specified across aerospace gas turbines, power generation, and high-temperature furnaces where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Nimonic 263 bolts are widely used for turbine case flanges, combustor assemblies, and afterburner hardware in both civil and military jet engines. Their high-temperature strength and oxidation resistance make them ideal for critical bolted joints exposed to cyclic thermal loads.
Used for bolting in high-temperature reactors, reformers, and process heaters where resistance to carburization, sulfidation, and thermal fatigue is essential. Nimonic 263 bolts maintain preload and integrity in hydrogen and hydrocarbon service up to 800°C.
Specified for heat recovery steam generator (HRSG) ducting, steam turbine casing bolts, and superheater flange connections where creep strength and oxidation resistance are required at elevated temperatures.
Nimonic 263 bolts are used in nuclear reactor core hardware, high-pressure vessel closures, and fasteners for heat exchangers operating in aggressive, high-temperature environments. Full traceability and low-cobalt variants available for nuclear applications.

Nimonic 263 Bolts Standards & International Certifications

Nimonic 263 Bolts 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, AMS material certification, heat treatment records, and first article inspection report (FAIR) — available on request for all orders.
Standards
DIN 931 DIN 933 DIN 912 ISO 4014 ISO 4017 ISO 4762 ASME B18.2.1 ASME B18.3 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Nimonic 263 Bolts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 263 Bolts — 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
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Answers for Buyers

Nimonic 263 Bolts — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 263 Bolts from RealBolt — covering AMS specification, heat treatment, creep rupture data, max service temperature, sizes, and aerospace certification. Contact our technical team directly for project-specific guidance on Nimonic 263 bolts selection and pricing.
Nimonic 263 bolts are available to DIN 931 (metric partial thread), DIN 933 (metric full thread), ISO 4014/4017, and ASME B18.2.1 (inch hex and heavy hex). Stud bolts for flanges are supplied per ASME B16.5 and MSS SP-75. Aerospace fasteners can be manufactured to AMS 5872/5873 and customer drawings.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Nimonic 263 bolts. Apply to threads and nut bearing faces to prevent galling. Reduce torque by 20% for lubricated assembly. Avoid copper-based anti-seize to prevent galvanic corrosion.
Yes – Nimonic 263 bolts are engineered for high-temperature service up to 800°C and exhibit excellent resistance to thermal fatigue, oxidation, and creep. They are widely used in gas turbines, HRSGs, and pressure vessels where cyclic loading and temperature fluctuations are present.
No formal MOQ for standard sizes (M12-M36) held in stock – single-piece supply available for urgent maintenance. Custom sizes or aerospace specifications may require a 10 kg minimum. Price breaks at 25, 100, 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