Nimonic 80A Nuts Manufacturer & Exporter in India

Explore Nimonic 80A Nuts Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.

-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 Nuts?

Nimonic 80A nuts are high-strength, nickel-chromium alloy fasteners manufactured from UNS N07080 bar or forgings, conforming to ASTM B637 and BS HR1 standards. This precipitation-hardened alloy is strengthened by titanium and aluminium additions, providing exceptional mechanical properties at elevated temperatures up to 815°C (1500°F).

Nimonic 80A nuts are widely specified for gas turbine, aerospace, and high-temperature bolting applications where resistance to oxidation, creep, and stress rupture is critical. Their stable microstructure and controlled hardness ensure reliable clamping force in the most demanding thermal cycling environments.

Quick Specifications

Material	Nimonic 80A
UNS Number	N07080
DIN Number	2.4952 / 2.4631
Material Standard	ASTM B637 / BS HR1
Nut Standard (Metric)	DIN 934 / ISO 4032
Nut Standard (Inch)	ASME B18.2.2
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M6-M64 / ¼"-2½"
Tensile Strength	965 MPa (140 ksi) min
Yield Strength	690 MPa (100 ksi) min
Hardness	Max 35 HRC / 320 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 Screws, Nimonic 80A Washers, 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 Screws

Nimonic 80A Washers

Nimonic 80A Studs

Nimonic 80A Threaded Rods

Technical Data

Nimonic 80A Nuts Dimensions, Sizes & Thread Standards

Nimonic 80A Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread pitches and heights available. Inch dimensions per ASME B18.2.2. All Nimonic 80A nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards before dispatch from

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)	Pitch (mm)	A/F (mm)	Height (mm)
M6	1.0	10	5.0
M8	1.25	13	6.5
M10	1.5	17	8.0
M12	1.75	19	10.0
M16	2.0	24	13.0
M20	2.5	30	16.0
M24	3.0	36	19.0
M30	3.5	46	24.0
M36	4.0	55	29.0
M42	4.5	65	34.0
M48	5.0	75	38.0
M56	5.5	85	45.0
M64	6.0	95	51.0

Dimensional & Material Standards

Standard	Covers	Thread
DIN 934	Hex nuts	Metric
ISO 4032	Hex nuts	Metric
ASME B18.2.2	Hex & heavy hex nuts	UNC/UNF
BS 1768	Hex nuts (inch)	BSW/BSF

Material Standard	Requirement
ASTM B637	Bar/forgings - UNS N07080
BS HR1	Forged nuts
AMS 5829	Aerospace fasteners
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

Nimonic 80A Chemical Composition

Nimonic 80A Nuts 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

Element	Composition (%)
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
Silicon (Si)	1.0 max
Manganese (Mn)	1.0 max
Iron (Fe)	Balance
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 Nuts

Ti + Al — Precipitation Strengthening

Titanium and aluminium additions enable ?' precipitation hardening, giving Nimonic 80A nuts their high strength and resistance to creep at temperatures up to 815°C, essential for turbine and exhaust flange joints.

Cr — Oxidation Resistance

Chromium content ensures a stable oxide layer, protecting nuts from scaling and oxidation in high-temperature service, especially in gas turbines and heat exchangers.

Low Carbon & Boron — Grain Boundary Stability

Strict control of carbon and boron prevents grain boundary embrittlement, ensuring nuts retain ductility and toughness after long-term exposure to high temperatures.

Fastener Performance

Nimonic 80A Nuts Mechanical Properties & Torque Reference

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

Nut Size	Recommended Torque (Nm)	Clamp Load (kN)
M12	80	35
M16	200	70
M20	400	110
M24	700	160
M30	1400	260
M36	2400	380
M42	3800	540
M48	5600	720

?? 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 Nuts Applications — Industries & End Uses

Nimonic 80A Nuts 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.

Aerospace & Gas Turbine Engines

Exhaust & Turbine Flanges

Nimonic 80A nuts are the preferred choice for securing turbine casings, exhaust flanges, and combustion chamber assemblies in jet engines and land-based gas turbines. Their high-temperature strength and oxidation resistance ensure reliable service in cyclic thermal environments.

Power Generation – Steam & Gas Turbines

Nimonic 80A nuts are used in bolted joints for steam and gas turbine casings, HRSG ductwork, and high-temperature piping systems where creep resistance and long-term stability are essential.

Petrochemical & Process Plants

These nuts are specified for high-temperature reactors, reformer tube sheets, and heat exchanger closures in ammonia, hydrogen, and syngas plants, where stainless steel fasteners would fail due to creep or oxidation.

Motorsport & Performance Exhausts

Nimonic 80A Nuts Standards & International Certifications

Nimonic 80A Nuts 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 934 ISO 4032 ASME B18.2.2 IS 1367

Certifications

DIN 2.4952DIN 2.4631EN 10269

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

Partner with RealBolt — India’s leading manufacturer of certified Nimonic 80A Nuts — 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.

Answers for Buyers

Nimonic 80A Nuts — Frequently Asked Questions

Browse expert answers to common questions about Nimonic 80A Nuts 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 nuts selection and pricing.

Free technical consultation for high-temperature bolting
Mill Test Certificate included
Export documentation handled
Sample orders accepted
Rapid Quotations
Competitive Factory Pricing
Application Engineering Support
Worldwide Shipping

What standards are available for Nimonic 80A nuts?

Nimonic 80A nuts are available to DIN 934 (metric hex), ISO 4032, ASME B18.2.2 (inch hex and heavy hex), and BS 1768 (inch). Aerospace nuts can be supplied to AMS 5829 and BS HR1. Custom thread forms (BSW, BSF, UNF) are available on request with short lead times.

What anti-seize should I use on Nimonic 80A nuts?

Use nickel-based anti-seize compound (such as Molykote P-37 or Jet-Lube Pure Nickel) on threads and nut faces to prevent galling and seizing at high temperatures. Avoid copper-based anti-seize, as it can cause galvanic corrosion with nickel alloys.

Are Nimonic 80A nuts suitable for gas turbine and exhaust flange service?

Yes - Nimonic 80A nuts are specifically designed for high-temperature bolting in gas turbines, exhaust systems, and combustion chambers. Their precipitation-hardened structure ensures strength and oxidation resistance up to 815°C, making them ideal for cyclic thermal environments.

What is the minimum order quantity (MOQ) for Nimonic 80A nuts?

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Ahmedabad
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