+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

Nimonic 90 Bolts Manufacturer & Exporter in India

Explore Nimonic 90 Bolts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
Request a Quote
View Products

-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 90 Bolts?

Nimonic 90 bolts are high-strength, nickel-chromium-cobalt alloy fasteners manufactured from UNS N07090 bar stock conforming to ASTM B637. Designed for extreme temperature and stress environments, Nimonic 90 bolts offer exceptional creep resistance, oxidation stability, and tensile strength up to 920°C. The alloy’s precipitation hardening via titanium and aluminium ensures reliable performance in gas turbines, aerospace, and high-temperature bolted joints.

With a minimum tensile strength of 965 MPa and excellent fatigue resistance, Nimonic 90 bolts are specified for turbine casings, exhaust manifolds, and petrochemical reactors where conventional stainless steels fail. All fasteners are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialNimonic 90
UNS NumberN07090
DIN Number2.4632
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 Strength965 MPa (140 ksi) min
Yield Strength690 MPa (100 ksi) min
HardnessMax 38 HRC / 340 HB
? All material certified by NABL-accredited laboratory. PMI and hardness survey available on request.

Complete the Fastener Set

Other Nimonic 90 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 90 fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 90 Nuts, Nimonic 90 Screws, Nimonic 90 Washers, Nimonic 90 Studs, and Nimonic 90 Threaded Rods. All Nimonic 90 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 90 Nuts
Nimonic 90 Screws
Nimonic 90 Washers
Nimonic 90 Studs
Nimonic 90 Threaded Rods

Technical Data

Nimonic 90 Bolts Dimensions, Sizes & Thread Standards

Nimonic 90 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 90 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 N07090
AMS 5829Forgings & fasteners
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 90 Chemical Composition

Nimonic 90 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)= 53.0%
Chromium (Cr)18.0-21.0%
Cobalt (Co)15.0-21.0%
Titanium (Ti)2.0-3.0%
Aluminium (Al)1.0-2.0%
Iron (Fe)1.5% max
Carbon (C)0.13% max
Manganese (Mn)1.0% max
Silicon (Si)1.0% max
Zirconium (Zr)0.08-0.25%
Boron (B)0.02-0.025%
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 90 Alloy Composition Matters for Bolts

Co (15–21%) — High-Temperature Strength
Cobalt enhances the alloy’s strength and stability at elevated temperatures, making Nimonic 90 bolts ideal for turbine and exhaust applications where creep resistance is critical.
Ti + Al — Precipitation Hardening
Titanium and aluminium form gamma prime (?') precipitates, providing outstanding tensile and fatigue strength even after prolonged exposure to 920°C.
Cr (18–21%) — Oxidation Resistance
Chromium ensures a stable oxide layer, protecting Nimonic 90 bolts from scaling and oxidation in aggressive, high-temperature environments.

Fastener Performance

Nimonic 90 Bolts Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 90 Bolts per ASTM. Nimonic 90 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). Lubricated values assume K=0.15. Never use copper-based anti-seize on nickel alloys.

Industry Applications

Nimonic 90 Bolts Applications — Industries & End Uses

Nimonic 90 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 90 bolts are the industry standard for gas turbine engine casings, exhaust manifolds, and afterburner assemblies. Their high-temperature strength and oxidation resistance ensure reliable fastening in jet engines and auxiliary power units (APUs).
Used in turbine casing flanges, HRSG ducting, and high-pressure steam lines, Nimonic 90 bolts withstand thermal cycling and creep at temperatures up to 920°C, outperforming stainless steel and Inconel 718 in long-term service.
Flange bolts and stud sets for reactor closures, reformer tube sheets, and high-temperature vessel nozzles in ammonia, hydrogen, and syngas plants where resistance to carburisation and oxidation is critical.
Nimonic 90 bolts are specified for turbocharger mounting, exhaust manifold flanges, and racing engine head bolts, providing secure fastening under extreme heat and vibration.

Nimonic 90 Bolts Standards & International Certifications

Nimonic 90 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 9001:2015EN 10204 3.1/3.2NABL LabPED 2014/68/EU

Buy Nimonic 90 Bolts from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 90 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
Email Us

Answers for Buyers

Nimonic 90 Bolts — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 90 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 90 bolts selection and pricing.
Nimonic 90 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) are available on request with 15 working day lead time.
Use nickel-based anti-seize compound (Molykote P-37, Jet-Lube Pure Nickel, or Bostik Never-Seez Pure Nickel). Apply to threads and nut bearing face. Reduce torque values by 20% vs dry assembly. Never use copper-based or zinc-based anti-seize on nickel alloys – galvanic corrosion risk is high at elevated temperatures.
Yes – Nimonic 90 bolts are specifically engineered for high-temperature, high-stress environments such as gas turbines, exhaust manifolds, and afterburners. Their precipitation-hardened structure ensures long-term strength and oxidation resistance up to 920°C.
No formal MOQ for standard sizes (M8-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes have an MOQ of 10 kg minimum. Flange stud bolt sets are supplied by the set with no minimum. Quantity price breaks 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