Does RAYCHIN provide material certificates for Nimonic fasteners?

Yes, RAYCHIN LIMITED provides EN 10204 3.1 / 3.2 certificates, PMI reports, and mechanical test results.

Nimonic Fasteners – The Complete Guide to Nickel-Chromium Superalloy Bolts, Nuts & Studs

Name: Nimonic Fasteners
Brand: RAYCHIN LIMITED
Availability: InStock

Published by RAYCHIN LIMITED · Special Alloy Fastener Manufacturer & Global Supplier

When turbine engines and high-temperature industrial processes demand fasteners that retain strength at extreme temperatures, Nimonic fasteners are the proven choice. RAYCHIN LIMITED supplies the complete range of Nimonic 75, 80A, 90, 105, and 263 bolts, nuts, washers, stud bolts, and custom-machined parts. This guide provides the technical depth engineers need to specify the correct Nimonic grade for critical hot-section applications.

✔ BS HR Series / AMS Certified  |  
            ✔ High-Temperature Strength to 950°C  |  
            ✔ Excellent Creep & Oxidation Resistance  |  
            ✔ Aerospace & Power Generation Proven

Product Range

Nimonic 80A Bolts

Most widely used Nimonic grade for high-temperature bolting. Excellent creep-rupture strength to 815°C.

Nimonic 90 Bolts

Higher cobalt content for improved high-temperature strength. For turbine engine fasteners.

Nimonic 75 Bolts

Solid-solution strengthened. Excellent oxidation resistance and formability for moderate loads.

Nimonic 105 Bolts

Highest strength grade for demanding turbine applications. Age-hardenable.

Nimonic Stud Bolts

Double-end and fully threaded studs for high-temperature flange connections.

Custom Nimonic Parts

Special threads, non-standard heads, and precision-machined components per drawing.

Material Grades & Typical Composition

Grade	Ni	Cr	Co	Ti	Al
Nimonic 75	Bal	~20%	–	~0.4%	–
Nimonic 80A	Bal	18–21%	–	1.8–2.7%	1.0–1.8%
Nimonic 90	≥54%	18–21%	15–21%	2–3%	1–2%
Nimonic 105	Bal	14.5%	20%	1.2%	4.5%
Nimonic 263	Bal	~20%	~20%	~2.4%	~0.5%

Key Properties

High-Temperature Strength: Retains mechanical properties up to 950°C depending on grade.
Creep Resistance: Excellent creep-rupture strength for long-term high-temperature service.
Oxidation Resistance: Chromium content provides excellent oxidation resistance at elevated temperatures.
Age Hardenability: Grades 80A, 90, 105, and 263 achieve high strength through precipitation hardening.

Applications

Aerospace: Turbine blades, combustion chamber components, and exhaust systems.
Power Generation: Gas turbine hot-section fasteners and steam turbine bolting.
Industrial Heating: High-temperature furnace components and heat-treating fixtures.
Automotive: Turbocharger components and exhaust valves in high-performance engines.

Quality Assurance

EN 10204 3.1 / 3.2 Material Test Certificates
Positive Material Identification (PMI)
Mechanical testing: tensile, yield, elongation, stress rupture
Hardness verification
Third-party inspection available

Frequently Asked Questions

What is Nimonic alloy?

Nimonic is a family of nickel-chromium superalloys designed for high-temperature strength, oxidation resistance, and creep performance in aerospace and power generation.

What are the common Nimonic grades for fasteners?

Nimonic 75, 80A, 90, 105, and 263. Grades 80A and 90 are the most widely used for high-temperature bolting.

Which standards cover Nimonic fasteners?

BS HR 1, HR 2, HR 501, HR 601, and AMS specifications depending on grade.

Does RAYCHIN provide material certificates?

Yes, EN 10204 3.1 / 3.2 and mechanical test reports are standard.

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