+912267437972

+919022636025

enquiry@real-bolt.com

Contact Us

Nimonic 80A Washers Manufacturer & Exporter in India

Explore Nimonic 80A Washers 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 80A Washers?

Nimonic 80A washers are high-performance nickel-chromium alloy flat, spring, and lock washers manufactured from UNS N07080 material conforming to ASTM B637. Designed for use in high-temperature bolted joints, these washers provide exceptional resistance to oxidation, creep, and stress relaxation up to 815°C. The alloy’s controlled additions of titanium and aluminium enable precipitation hardening, delivering superior mechanical strength and dimensional stability under cyclic thermal loads.

Nimonic 80A washers are widely specified in gas turbines, exhaust manifolds, and petrochemical reactors where conventional stainless steel washers fail due to thermal softening or scaling. All washers are supplied with full traceability and EN 10204 3.1 certification.

Quick Specifications

MaterialNimonic 80A
UNS NumberN07080
DIN Number2.4952 / 2.4631
Material StandardASTM B637
Washer Standard (Metric)DIN 125 / DIN 127 / DIN 6796
Washer Standard (Inch)ASME B18.22.1
TypeFlat, Spring, Lock, Belleville
Size RangeM3-M72 / 1/8"-3"
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 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 Studs, 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 Studs
Nimonic 80A Threaded Rods

Technical Data

Nimonic 80A Washers Dimensions, Sizes & Thread Standards

Nimonic 80A Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat), DIN 127 (spring), DIN 6796 (Belleville), and ASME B18.22.1. Custom OD/ID and thickness available. Metric and inch sizes supplied. All Nimonic 80A washers dimensions are verified against applicable DIN, ISO, and ASME B18

Flat Washer Dimensions - Metric (DIN 125)

Size (M)ID (mm)OD (mm)Thickness (mm)
M33.270.5
M66.4121.6
M88.4161.6
M1010.5202.0
M1213.0242.5
M1617.0303.0
M2021.0373.0
M2425.0444.0
M3031.0564.0
M3637.0665.0
M4243.0786.0
M4849.0926.0
M5657.01058.0
M6465.01158.0
M7273.013010.0

Dimensional & Material Standards

StandardCoversType
DIN 125Flat washersMetric
DIN 127Spring lock washersMetric
DIN 6796Belleville washersMetric
ASME B18.22.1Plain & lock washersInch
ISO 7089Flat washersMetric
ISO 7090Chamfered washersMetric
Material StandardRequirement
ASTM B637Bar/strip - UNS N07080
AMS 5829Wire/strip for washers
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Nimonic 80A Chemical Composition

Nimonic 80A Washers 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
Zirconium (Zr)0.15 max
Boron (B)0.006 max
Sulphur (S)0.015 max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Nimonic 80A Alloy Composition Matters for Washers

Cr (18–21%) — Oxidation Resistance
Chromium ensures Nimonic 80A washers resist scaling and surface degradation at temperatures up to 850°C, maintaining preload and joint integrity in turbine and exhaust assemblies.
Ti + Al (1.8–2.7% + 1.0–1.8%) — Precipitation Hardening
Titanium and aluminium enable ?' precipitation, giving Nimonic 80A washers high strength and resistance to stress relaxation under cyclic thermal loads.
Low Carbon & Boron — Grain Boundary Stability
Strict control of carbon and boron prevents grain boundary embrittlement, ensuring long-term reliability in high-stress, high-temperature bolted joints.

Fastener Performance

Nimonic 80A Washers Mechanical Properties & Creep Resistance Data

The table below lists mechanical properties and creep resistance data for Nimonic 80A Washers per ASTM. Nimonic 80A washers achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Washer SizeRecommended Bolt SizeMax Service Temp (°C)
M6M6815
M12M12815
M16M16815
M20M20815
M24M24815
M30M30815
M36M36815
?? Note: For critical bolted joints, consult engineering for washer thickness and type selection. Nimonic 80A washers are not recommended for continuous use above 815°C.

Industry Applications

Nimonic 80A Washers Applications — Industries & End Uses

Nimonic 80A Washers 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 washers are the standard for turbine casing, exhaust manifold, and combustor bolted joints in jet engines and land-based gas turbines. Their high creep resistance and oxidation stability ensure preload retention at elevated temperatures. Rolls-Royce, GE, and Siemens approved.
Used in reactor closures, reformer tube supports, and high-temperature flange joints where stainless steel washers fail due to creep or scaling. Nimonic 80A maintains joint integrity in hydrogen, ammonia, and syngas service.
Washer sets for heat recovery steam generator (HRSG) ducting, flue gas desulphurisation (FGD) internals, and gas turbine exhaust flanges where thermal cycling and acidic condensates are present.
Nimonic 80A spring and lock washers are used in racing exhaust manifolds, turbocharger flanges, and cylinder head assemblies to prevent bolt loosening under vibration and thermal shock.

Nimonic 80A Washers Standards & International Certifications

Nimonic 80A Washers 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 125A DIN 127 ISO 7089 ISO 7090 ASME B18.21.1 IS 1367
Certifications
ISO 9001:2015NABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

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

Browse expert answers to common questions about Nimonic 80A Washers 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 washers selection and pricing.
Nimonic 80A washers are supplied to DIN 125 (flat), DIN 127 (spring), DIN 6796 (Belleville), ISO 7089/7090, and ASME B18.22.1 (inch). Custom washer types and dimensions are available on request, including special chamfered and conical forms for turbine and exhaust applications.
Yes, Nimonic 80A washers are designed for continuous service up to 815°C. For applications above this temperature, consult engineering for alternative grades such as Nimonic 90 or Inconel 718. Prolonged exposure above 815°C may reduce mechanical strength and preload retention.
Nimonic 80A washers can be used with stainless steel bolts, but for high-temperature or corrosive environments, matching the washer and bolt material is recommended to prevent galvanic corrosion and ensure uniform thermal expansion.
Standard sizes (M6-M24) are available ex-stock with no MOQ. Custom sizes or special types (Belleville, heavy-duty spring) typically require a 10 kg minimum order. Price breaks are available at 100 pcs, 500 pcs, and 1000 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