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Nimonic 263 Studs Manufacturer & Exporter in India

Explore Nimonic 263 Studs 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 Studs?

Nimonic 263 studs are high-strength, nickel-cobalt-chromium-molybdenum alloy fasteners manufactured from UNS N07263 bar stock conforming to ASTM B637. Designed for service in high-temperature environments up to 800°C, these studs offer a unique combination of oxidation resistance, creep strength, and excellent weldability. The alloy’s controlled additions of titanium and aluminum enable precipitation hardening, delivering superior mechanical properties for critical bolted joints.

Nimonic 263 studs are widely specified in gas turbine, petrochemical, and power generation applications where both high temperature and aggressive environments demand reliable, long-term fastener performance. All material is supplied with full traceability and test certification.

Quick Specifications

MaterialNimonic 263
UNS NumberN07263
DIN Number2.4650
Material StandardASTM B637
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"-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 Bolts, Nimonic 263 Nuts, Nimonic 263 Screws, Nimonic 263 Washers, 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 Bolts
Nimonic 263 Nuts
Nimonic 263 Screws
Nimonic 263 Washers
Nimonic 263 Threaded Rods

Technical Data

Nimonic 263 Studs Dimensions, Sizes & Thread Standards

Nimonic 263 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (metric threaded rods and studs), ISO 898-1, and ASME B16.5/B18.31.2 for inch series. Custom cut lengths and thread forms available on request. All Nimonic 263 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Dimensions - Metric (DIN 976)

Size (M)Pitch (mm)Thread Length (mm)Min L (mm)Max L (mm)
M61.01820200
M81.252225300
M101.52630400
M121.753035500
M162.03840600
M202.54450800
M243.054601000
M303.566701200
M364.078801500
M424.5901001800
M485.01021202000
M565.51141402500
M646.01261603000
M726.01381803500

Dimensional & Material Standards

StandardCoversThread
DIN 976Threaded rods & studsMetric
ISO 898-1Mechanical propertiesMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous thread studsUNC/UNF
BS 4882Petrochemical stud boltsMetric/UNC
Material StandardRequirement
ASTM B637Bar/rod - UNS N07263
AMS 5872Forging/fastener stock
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 263 Chemical Composition

Nimonic 263 Studs 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 max
Copper (Cu)0.2 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 263 Alloy Composition Matters for Studs

Cr + Co (19–21%) — Oxidation & Hot Corrosion Resistance
Chromium and cobalt provide Nimonic 263 studs with outstanding resistance to oxidation and hot corrosion at temperatures up to 800°C, making them ideal for gas turbine and exhaust flange connections.
Mo (5.6–6.1%) — Creep Strength
Molybdenum enhances the alloy’s creep resistance, ensuring stud bolts retain preload and mechanical integrity during long-term high-temperature service.
Ti + Al — Precipitation Hardening
Titanium and aluminum enable age-hardening, delivering high tensile and yield strength for critical bolted joints in pressure vessels and turbine assemblies.

Fastener Performance

Nimonic 263 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 263 Studs per ASTM. Nimonic 263 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)
M121108838
M1626020885
M20520416136
M24900720198
M3018001440315
M3631002480457
M4249503960630
M4873505880830
?? 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

Nimonic 263 Studs Applications — Industries & End Uses

Nimonic 263 Studs 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 studs are the fastener of choice for gas turbine casings, exhaust manifolds, and combustor flange joints. Their high-temperature strength and oxidation resistance ensure reliable sealing and preload retention in turbine and engine assemblies operating up to 800°C.
Stud bolts for high-pressure vessel closures, reformer tube sheets, and heat exchanger channel covers in hydrogen, ammonia, and syngas plants. Nimonic 263’s resistance to carburization and nitridation makes it ideal for aggressive process environments.
Used in jet engine afterburner assemblies, mounting brackets, and structural joints where both fatigue strength and oxidation resistance are critical. AMS 5872 and ASTM B637 compliance ensures suitability for aerospace applications.
Studs for heat recovery steam generator (HRSG) ducting, superheater header connections, and high-temperature boiler flange joints. Nimonic 263 maintains mechanical properties under thermal cycling and steam exposure.

Nimonic 263 Studs Standards & International Certifications

Nimonic 263 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, AMS material certification, heat treatment records, and first article inspection report (FAIR) — available on request for all orders.
Standards
DIN 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

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

Nimonic 263 Studs — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 263 Studs 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 studs selection and pricing.
Nimonic 263 studs are available to DIN 976 (metric threaded rods and studs), ISO 898-1 (mechanical properties), ASME B16.5 (flange stud bolts), and ASME B18.31.2 (inch continuous thread studs). Custom thread forms such as BSW, BSF, and Whitworth can be supplied on request with short lead times.
Always use a nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on Nimonic 263 studs. Apply to threads and nut bearing faces to prevent galling and seizing. Do not use copper-based or zinc-based anti-seize, as these can cause galvanic corrosion with nickel alloys.
Yes – Nimonic 263 offers excellent resistance to hydrogen embrittlement, nitridation, and carburization, making it suitable for hydrogen reformers, ammonia plants, and syngas process equipment. All material is supplied with full traceability and test certification.
No MOQ for standard sizes (M12-M36) held in stock – we supply from single pieces for urgent maintenance. Custom sizes and non-standard thread forms typically require a 10 kg minimum. Quantity 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