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Nimonic 80A Studs Manufacturer & Exporter in India

Explore Nimonic 80A 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 80A Studs?

Nimonic 80A studs are high-strength nickel-chromium alloy fasteners manufactured from UNS N07080 bar stock, conforming to ASTM B637 and BS HR1 standards. This precipitation-hardened alloy is strengthened by additions of titanium and aluminium, providing exceptional creep and oxidation resistance at temperatures up to 815°C (1500°F).

Nimonic 80A studs are widely specified for gas turbine, petrochemical, and high-temperature bolted flange connections where standard stainless steels fail due to thermal cycling, scaling, or stress relaxation. Each batch is solution treated and precipitation hardened to achieve optimal mechanical properties for critical service.

Quick Specifications

MaterialNimonic 80A
UNS NumberN07080
DIN Number2.4952 / 2.4631
Material StandardASTM B637 / BS HR1
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 Strength1050 MPa (152 ksi) min
Yield Strength690 MPa (100 ksi) min
HardnessMax 35 HRC / 320 HB
? All material certified by NABL-accredited laboratory. PMI and heat treatment charts available on request.

Complete the Fastener Set

Other Nimonic 80A Fastener Products Available from RealBolt

RealBolt also manufactures the complete Nimonic 80A fastener range from certified nickel-chromium-cobalt superalloy bar stock, including Nimonic 80A Bolts, Nimonic 80A Nuts, Nimonic 80A Screws, Nimonic 80A Washers, and Nimonic 80A Threaded Rods. All Nimonic 80A fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Nimonic 80A Bolts
Nimonic 80A Nuts
Nimonic 80A Screws
Nimonic 80A Washers
Nimonic 80A Threaded Rods

Technical Data

Nimonic 80A Studs Dimensions, Sizes & Thread Standards

Nimonic 80A Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 976 (metric threaded rods) / ASME B16.5 (flange studs) / ISO 898-1. Custom cut lengths available in 5mm increments. Inch dimensions per ASME B18.31.2. All Nimonic 80A 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
M81.252225250
M101.52630300
M121.753035400
M162.03840500
M202.54450600
M243.05460800
M303.566701000
M364.078801200
M424.5901001500
M485.01021202000
M565.51141402500
M646.01261603000

Dimensional & Material Standards

StandardCoversThread
DIN 976Threaded rods & studsMetric
ASME B16.5Stud bolts for flangesUNC
ASME B18.31.2Continuous thread studsUNC/UNF
ISO 898-1Mechanical propertiesMetric
BS 4882Petrochemical flange studsMetric/UNC
Material StandardRequirement
ASTM B637Bar/rod - UNS N07080
BS HR1Forgings & fasteners
AMS 5829High-temp fasteners
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 80A Chemical Composition

Nimonic 80A 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)69.0 min
Chromium (Cr)18.0-21.0
Cobalt (Co)2.0 max
Titanium (Ti)1.8-2.7
Aluminium (Al)1.0-1.8
Carbon (C)0.10 max
Iron (Fe)3.0 max
Manganese (Mn)1.0 max
Silicon (Si)1.0 max
Copper (Cu)0.2 max
Sulphur (S)0.015 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 80A Alloy Composition Matters for Studs

Ti + Al — Precipitation Hardening
Titanium and aluminium form gamma prime (?') precipitates, giving Nimonic 80A studs their high-temperature strength and resistance to creep, even under sustained loads at 700–800°C.
Cr (18–21%) — Oxidation Resistance
High chromium content ensures a stable oxide layer, protecting stud surfaces from scaling and oxidation in turbine and exhaust environments.
Low Carbon & Sulphur
Strict control of carbon and sulphur prevents grain boundary embrittlement, ensuring reliable performance in cyclic thermal service and after repeated tightening.

Fastener Performance

Nimonic 80A Studs Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Nimonic 80A Studs per ASTM. Nimonic 80A 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)
M121209638
M1629523685
M20590472135
M241020816195
M3020501640310
M3635502840450
M4256504520620
M4884006720820
?? 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 80A Studs Applications — Industries & End Uses

Nimonic 80A 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 80A studs are the industry standard for bolting turbine casings, exhaust manifolds, and combustion chamber flanges in gas turbines and jet engines. Their high-temperature strength and oxidation resistance prevent bolt relaxation and scaling during thermal cycling.
Used for bolting reactor closures, reformer tube sheets, and high-pressure vessel nozzles in hydrogen, ammonia, and syngas plants. Nimonic 80A studs maintain preload and resist carburisation and nitridation at process temperatures up to 800°C.
Studs for steam turbine casing joints, HRSG ductwork, and superheater header flanges where creep resistance and long-term bolt integrity are critical under cyclic loading and high temperatures.
Nimonic 80A studs are specified for aircraft engine mounting, afterburner assemblies, and missile exhaust systems where high fatigue strength and oxidation resistance are required at elevated temperatures.

Nimonic 80A Studs Standards & International Certifications

Nimonic 80A 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 80A Studs from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 80A 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 80A Studs — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 80A 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 80A studs selection and pricing.
Nimonic 80A studs are available to DIN 976 (metric threaded rods), ASME B16.5 (flange studs), ASME B18.31.2 (inch continuous thread), and BS 4882 (petrochemical flange studs). Custom thread forms (BSW, BSF, Whitworth) and cut lengths are available 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 80A 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 80A studs are engineered for continuous service up to 815°C (1500°F) and maintain their mechanical properties under cyclic thermal loading. They are widely used in gas turbines, HRSGs, and petrochemical reactors where standard stainless steel studs would fail due to creep or oxidation.
No formal MOQ for standard sizes (M10-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom diameters or cut lengths have an MOQ of 10 kg. Flange stud sets for ASME B16.5 are supplied per 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