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Nimonic 75 Bolts Manufacturer & Exporter in India

Explore Nimonic 75 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 75 Bolts?

Nimonic 75 bolts are high-performance fasteners manufactured from a nickel-chromium alloy (UNS N06075) designed for exceptional oxidation and scaling resistance at elevated temperatures up to 1100°C. Produced from ASTM B637 bar, these bolts are solution-annealed and air-cooled to deliver reliable mechanical strength and stability in demanding thermal environments.

With a nominal composition of 80% nickel and 20% chromium, Nimonic 75 bolts are widely specified for gas turbine, furnace, and heat treatment applications where both creep resistance and corrosion protection are critical. They are available in a full range of metric and inch sizes, conforming to international fastener standards for aerospace, power generation, and petrochemical industries.

Quick Specifications

MaterialNimonic 75
UNS NumberN06075
DIN Number2.4951
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 Strength750 MPa (109 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 Nuts, Nimonic 75 Screws, Nimonic 75 Washers, Nimonic 75 Studs, 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 Nuts
Nimonic 75 Screws
Nimonic 75 Washers
Nimonic 75 Studs
Nimonic 75 Threaded Rods

Technical Data

Nimonic 75 Bolts Dimensions, Sizes & Thread Standards

Nimonic 75 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 75 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 N06075
BS HR5Fastener mechanical
AMS 5598Sheet/strip
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 75 Chemical Composition

Nimonic 75 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)72.0 min
Chromium (Cr)19.0-21.0
Iron (Fe)5.0 max
Titanium (Ti)0.2-0.6
Carbon (C)0.08-0.15
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 Bolts

High Nickel & Chromium — Oxidation Resistance
The high nickel and chromium content in Nimonic 75 provides outstanding resistance to oxidation and scaling at temperatures up to 1100°C, making these bolts ideal for furnace and gas turbine service.
Titanium — Grain Stability
Titanium additions enhance grain boundary stability, improving creep resistance and preventing embrittlement during long-term high-temperature exposure.
Low Carbon — Weldability
Controlled carbon content ensures Nimonic 75 bolts can be welded with minimal risk of carbide precipitation, maintaining corrosion resistance in the heat-affected zone.

Fastener Performance

Nimonic 75 Bolts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 75 Bolts per ASTM. Nimonic 75 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)
M12826630
M1619515672
M20390312115
M24670536168
M3013401072267
M3623201856388
M4237002960534
M4855004400702
?? Anti-galling: Use nickel-based anti-seize (Molykote P-37). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloys.

Industry Applications

Nimonic 75 Bolts Applications — Industries & End Uses

Nimonic 75 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 75 bolts are widely used in jet engine casings, turbine exhaust assemblies, and afterburner flanges due to their ability to retain strength and resist oxidation at temperatures exceeding 1000°C. Approved to AMS 5598 and BS HR5 for aerospace fastener applications.
Hex bolts and threaded rods for furnace linings, radiant tube supports, and heat treatment baskets where resistance to scaling and thermal cycling is essential for long service life.
Stud bolts and nuts for reactor closures, high-temperature piping, and pressure vessel flanges in environments with aggressive gases and cyclic thermal loads. Nimonic 75 is preferred where stainless steels fail due to oxidation.
Bolting for steam turbine casings, gas turbine exhausts, and HRSG ductwork where high-temperature creep resistance and oxidation protection are required for reliable operation.

Nimonic 75 Bolts Standards & International Certifications

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

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 75 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
+91 90226 36025
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Answers for Buyers

Nimonic 75 Bolts — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 75 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 75 bolts selection and pricing.
Nimonic 75 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. Custom thread forms (BSW, BSF, Whitworth) can be manufactured on request with a typical lead time of 2-3 weeks.
Nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) is recommended for Nimonic 75 bolts. Apply to threads and nut bearing faces to prevent galling and seizing. Reduce torque values by 20% when lubricated. Do not use copper-based anti-seize on nickel alloys to avoid galvanic corrosion.
Yes – Nimonic 75 bolts are engineered for continuous service at temperatures up to 1100°C, retaining mechanical strength and resisting oxidation and scaling. They are widely used in gas turbines, furnaces, and heat treatment equipment where long-term thermal stability is essential.
No formal MOQ for standard sizes (M8-M36) held in stock – single-piece orders are accepted for urgent maintenance. Custom sizes or non-standard threads typically require a 10 kg minimum. 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