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Nimonic 90 Screws Manufacturer & Exporter in India

Explore Nimonic 90 Screws 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 90 Screws?

Nimonic 90 screws are high-performance nickel-chromium-cobalt alloy fasteners engineered for extreme temperature and stress environments. Manufactured from UNS N07090 bar stock to ASTM B637, these screws are precipitation-hardened to achieve exceptional tensile and creep-rupture strength up to 920°C. The alloy’s balanced additions of titanium and aluminium enable ?’ phase strengthening, while chromium and cobalt provide oxidation and corrosion resistance in aggressive atmospheres.

Nimonic 90 screws are widely specified in gas turbine engines, nuclear reactors, and high-temperature bolted joints where conventional stainless steel or Inconel fasteners would fail due to thermal fatigue or loss of strength. Each batch is supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialNimonic 90
UNS NumberN07090
DIN Number2.4632
Material StandardASTM B637
Screw Standard (Metric)DIN 912 / DIN 7991 / ISO 4762
Screw Standard (Inch)ASME B18.3
Thread FormISO Metric / UNC / UNF
Diameter RangeM3-M48 / 1/8"-2"
Tensile Strength965 MPa (140 ksi) min
Yield Strength690 MPa (100 ksi) min
HardnessMax 38 HRC / 350 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 Bolts, Nimonic 90 Nuts, 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 Bolts
Nimonic 90 Nuts
Nimonic 90 Washers
Nimonic 90 Studs
Nimonic 90 Threaded Rods

Technical Data

Nimonic 90 Screws Dimensions, Sizes & Thread Standards

Nimonic 90 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap), DIN 7991 (countersunk), ISO 4762 (hex socket). Custom lengths in 5mm increments. Inch dimensions available per ASME B18.3. All Nimonic 90 screws dimensions are verified against applicable DIN, ISO, and ASME

Socket Head Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)Pitch (mm)Head Dia (mm)Head Ht (mm)Hex Socket (mm)Min L (mm)Max L (mm)
M30.55.53.02.5650
M40.77.04.03.0860
M50.88.55.04.01070
M61.010.06.05.01280
M81.2513.08.06.016100
M101.516.010.08.020120
M121.7518.012.010.025150
M162.024.016.014.030200
M202.530.020.017.040250
M243.036.024.019.050300
M303.545.030.022.060400
M364.054.036.027.080500
M424.563.042.032.0100600
M485.072.048.036.0120700

Dimensional & Material Standards

StandardCoversThread
DIN 912Socket head cap screwsMetric
DIN 7991Countersunk socket screwsMetric
ISO 4762Hex socket head screwsMetric
ASME B18.3Socket cap, button, flat headUNC/UNF
ISO 4026Socket set screwsMetric
ISO 4027Socket set screws with pointMetric
Material StandardRequirement
ASTM B637Bar/rod - UNS N07090
AMS 5829Forging/fastener stock
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 90 Chemical Composition

Nimonic 90 Screws 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
Silicon (Si)1.0% max
Manganese (Mn)1.0% max
Zirconium (Zr)0.2% max
Boron (B)0.02% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 90 Alloy Composition Matters for Screws

?' Precipitation Strengthening
Titanium and aluminium additions form a ?' phase, dramatically increasing high-temperature strength and creep resistance. This is critical for Nimonic 90 screws in turbine and exhaust assemblies.
Cobalt & Chromium — Oxidation Resistance
Cobalt and chromium provide a stable oxide layer, protecting screws from scaling and corrosion at temperatures up to 920°C, far beyond stainless steel capabilities.
Low Iron Content
Strict iron limits prevent embrittlement and maintain ductility under thermal cycling, ensuring Nimonic 90 screws retain integrity in cyclic service.

Fastener Performance

Nimonic 90 Screws Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 90 Screws per ASTM. Nimonic 90 screws achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Screw SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M614118.5
M8342715.5
M10685424.5
M121209635.5
M1629523662.5
M2058046498.5
M241000800142.5
?? 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 90 Screws Applications — Industries & End Uses

Nimonic 90 Screws 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.
Nuclear & Power Generation
Aerospace & Defence
Gas turbine combustor assemblies, turbine blade retainers, and afterburner hardware rely on Nimonic 90 screws for their ability to maintain preload and resist creep at 700-920°C. Used in Rolls-Royce, GE, and Siemens engine platforms.
Critical bolted joints in chemical reactors, reformer tube sheets, and high-temperature heat exchangers use Nimonic 90 screws for their resistance to carburisation, nitridation, and chloride attack.

Nimonic 90 Screws Standards & International Certifications

Nimonic 90 Screws 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 912 DIN 913 DIN 914 DIN 915 DIN 916 DIN 6912 DIN 7984 ISO 4762 ISO 10642 ISO 14579 ASME B18.3 EN ISO 4762 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 90 Screws — 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 90 Screws — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 90 Screws 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 screws selection and pricing.
Nimonic 90 socket head screws are available to DIN 912 (metric), ISO 4762, DIN 7991 (countersunk), and ASME B18.3 (inch). Socket set screws per ISO 4026/4027 are also available. Custom thread forms (BSW, BSF, Whitworth) can be supplied on request with a typical lead time of 2-3 weeks.
Use nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on threads and under the screw head. Reduce torque values by 20% for lubricated assembly. Do not use copper-based anti-seize on nickel alloys to avoid galvanic corrosion.
Yes – Nimonic 90 screws are engineered for continuous service up to 920°C, retaining high tensile and creep strength. They are widely used in turbine and exhaust assemblies where temperatures exceed 800°C. For applications above 900°C, consult our engineering team for specific recommendations.
No formal MOQ for standard sizes (M6-M24) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes or non-standard threads typically require a 5 kg 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