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Nimonic 75 Studs Manufacturer & Exporter in India

Explore Nimonic 75 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 75 Studs?

Nimonic 75 studs are high-temperature nickel-chromium alloy fasteners manufactured from UNS N06075 bar stock, conforming to ASTM B637. Designed for exceptional oxidation and scaling resistance up to 1100°C, these studs are widely used in gas turbine, furnace, and petrochemical applications where both mechanical strength and thermal stability are critical.

With a nominal composition of 80% nickel and 20% chromium, Nimonic 75 studs offer excellent resistance to corrosion and stress-rupture cracking in aggressive environments. They are specified for bolted joints in heat exchangers, exhaust manifolds, and high-temperature vessel closures, ensuring reliable performance under cyclic thermal loads.

Quick Specifications

MaterialNimonic 75
UNS NumberN06075
DIN Number2.4951
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-M64 / ¼"-2½"
Tensile Strength780 MPa (113 ksi) min
Yield Strength340 MPa (49 ksi) min
HardnessMax 95 HRB / 210 HB
? All material certified by NABL-accredited laboratory. PMI and heat traceability available on request.

Complete the Fastener Set

Other Nimonic 75 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 75 fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 75 Bolts, Nimonic 75 Nuts, Nimonic 75 Screws, Nimonic 75 Washers, and Nimonic 75 Threaded Rods. All Nimonic 75 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 75 Bolts
Nimonic 75 Nuts
Nimonic 75 Screws
Nimonic 75 Washers
Nimonic 75 Threaded Rods

Technical Data

Nimonic 75 Studs Dimensions, Sizes & Thread Standards

Nimonic 75 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (full thread) / ISO 898-1. Custom cut lengths in 5mm increments. Inch dimensions available per ASME B16.5 and B18.31.2. All Nimonic 75 studs dimensions are verified against 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)
M61.0Full20200
M81.25Full25250
M101.5Full30300
M121.75Full35400
M162.0Full40500
M202.5Full50600
M243.0Full60800
M303.5Full701000
M364.0Full801200
M424.5Full901500
M485.0Full1001800
M565.5Full1202000
M646.0Full1402500

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 4439Threaded rodsMetric
Material StandardRequirement
ASTM B637Bar/rod - UNS N06075
AMS 5598Sheet/strip for fasteners
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 75 Chemical Composition

Nimonic 75 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)Min 72.0
Chromium (Cr)19.0-21.0
Iron (Fe)5.0 max
Titanium (Ti)0.2-0.6
Carbon (C)0.08 max
Manganese (Mn)1.0 max
Silicon (Si)1.0 max
Copper (Cu)0.5 max
Sulphur (S)0.015 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 75 Alloy Composition Matters for Studs

Cr (19–21%) — Oxidation Resistance
Chromium forms a stable oxide layer, protecting Nimonic 75 studs from scaling and oxidation at temperatures up to 1100°C, making them ideal for furnace and turbine bolting.
Ti (0.2–0.6%) — Creep Strength
Titanium additions improve creep rupture strength, ensuring Nimonic 75 studs maintain preload and integrity during long-term high-temperature service.
Low Carbon — Weldability
Low carbon content minimizes carbide precipitation, allowing Nimonic 75 studs to be welded or tack-welded in assemblies without loss of corrosion resistance.

Fastener Performance

Nimonic 75 Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 75 Studs per ASTM. Nimonic 75 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)
M12907234
M1622017680
M20440352128
M24760608185
M3015201216295
M3626502120430
M4242003360590
M4862004960780
?? 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 75 Studs Applications — Industries & End Uses

Nimonic 75 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 75 studs are widely used in gas turbine engine casings, combustion chambers, and exhaust assemblies due to their ability to retain strength and resist oxidation at elevated temperatures. They are specified in Rolls-Royce, GE, and Pratt & Whitney engine designs for critical bolted joints.
Studs for heat exchanger closures, furnace doors, and reactor vessel flanges in petrochemical plants where high-temperature corrosion and scaling resistance are essential. Nimonic 75 is preferred for bolting in reformer and cracker units.
Used in heat recovery steam generator (HRSG) ductwork, boiler manways, and superheater header connections where thermal cycling and high-temperature oxidation are present. Nimonic 75 studs ensure reliable sealing and joint integrity.
Specified for furnace shell bolting, kiln door fasteners, and radiant tube supports in steel, glass, and ceramic industries. The alloy’s stability at 1100°C prevents bolt loosening and scaling.

Nimonic 75 Studs Standards & International Certifications

Nimonic 75 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 75 Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 75 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 75 Studs — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 75 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 75 studs selection and pricing.
Nimonic 75 studs are available to DIN 976 (metric full thread), ISO 898-1 (mechanical properties), ASME B16.5 (flange studs), and ASME B18.31.2 (inch continuous thread). Custom thread forms such as BSW, BSF, and Whitworth can be supplied on request with a typical lead time of 2-3 weeks.
Always use a nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on Nimonic 75 studs to prevent galling and facilitate disassembly after high-temperature service. Avoid copper-based anti-seize to prevent galvanic corrosion. Lubricated torque values should be reduced by 20% compared to dry assembly.
Yes – Nimonic 75 studs are engineered for continuous service up to 1100°C, maintaining mechanical strength and resisting oxidation and scaling. They are widely specified for gas turbines, furnaces, and petrochemical reactors where thermal cycling and creep resistance are critical.
No formal MOQ for standard metric sizes (M12-M36) held in stock – we supply from single pieces for urgent maintenance. Custom sizes or non-standard threads typically require a 10 kg minimum. Flange stud sets for ASME B16.5 are supplied per set with no minimum. Quantity discounts apply 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