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Incoloy 800 Washers Manufacturer & Exporter in India

Explore Incoloy 800 Washers 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 Incoloy 800 Washers?

Incoloy 800 washers are high-temperature nickel-iron-chromium alloy flat, spring, and lock washers manufactured from UNS N08800 bar or plate, conforming to ASTM B409 and B408. Designed for use in environments requiring resistance to oxidation, carburization, and chloride stress corrosion cracking, Incoloy 800 washers maintain mechanical integrity at temperatures up to 1100°C.

These washers are widely specified for bolted joints in heat exchangers, furnace equipment, and petrochemical processing plants, where standard stainless steel washers would fail due to thermal cycling or aggressive media. Incoloy 800 washers are available in all standard DIN, ISO, and ASME dimensions, with full traceability and certification.

Quick Specifications

MaterialIncoloy 800
UNS NumberN08800
DIN Number1.4876
Material StandardASTM B409 / B408
Washer Standard (Metric)DIN 125 / DIN 127 / DIN 9021
Washer Standard (Inch)ASME B18.22.1
TypeFlat, Spring, Lock, Tab, Belleville
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength450 MPa (65 ksi) min
Yield Strength205 MPa (30 ksi) min
HardnessMax 85 HRB / 180 HB
? All material certified by NABL-accredited laboratory. PMI and hardness testing available on request.

Complete the Fastener Set

Other Incoloy 800 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Incoloy 800 fastener range from certified iron-nickel-chromium alloy bar stock, including Incoloy 800 Bolts, Incoloy 800 Nuts, Incoloy 800 Screws, Incoloy 800 Studs, and Incoloy 800 Threaded Rods. All Incoloy 800 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Incoloy 800 Bolts
Incoloy 800 Nuts
Incoloy 800 Screws
Incoloy 800 Studs
Incoloy 800 Threaded Rods

Technical Data

Incoloy 800 Washers Dimensions, Sizes & Thread Standards

Incoloy 800 Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat), DIN 127 (spring), DIN 9021 (large OD), and ASME B18.22.1. Custom thicknesses and outside diameters available. Inch sizes per ASME and BS standards. All Incoloy 800 washers dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Flat Washer Dimensions - Metric (DIN 125)

Size (M)ID (mm)OD (mm)Thickness (mm)
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
M8081.014010.0
M100101.018012.0

Dimensional & Material Standards

StandardCoversType
DIN 125Flat washersMetric
DIN 127Spring lock washersMetric
DIN 9021Large OD washersMetric
ASME B18.22.1Plain & lock washersInch
BS 4320Form A-G washersMetric/Inch
Material StandardRequirement
ASTM B409Plate/sheet - UNS N08800
ASTM B408Bar/rod - UNS N08800
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Incoloy 800 Chemical Composition

Incoloy 800 Washers are produced from an iron-nickel-chromium alloy with controlled nickel (30–46%), chromium (19–23%), and molybdenum content per ASTM. Nickel and chromium together resist high-temperature oxidation to 1093°C in 800H grades, while molybdenum and copper additions in Incoloy 825 provide sulfuric and phosphoric acid resistance.

Chemical Composition per ASTM B409/B408

ElementComposition (%)
Nickel (Ni)30.0-35.0%
Chromium (Cr)19.0-23.0%
Iron (Fe)39.5% min
Carbon (C)0.10% max
Aluminium (Al)0.15-0.60%
Titanium (Ti)0.15-0.60%
Manganese (Mn)1.5% max
Silicon (Si)1.0% max
Copper (Cu)0.75% max
Sulfur (S)0.015% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Incoloy 800 Alloy Composition Matters for Washers

High Nickel & Chromium — Oxidation Resistance
The high nickel and chromium content in Incoloy 800 provides outstanding resistance to oxidation and carburization at elevated temperatures, ensuring washer integrity in furnace and heat exchanger assemblies.
Al + Ti Stabilization — Prevents Sensitization
Aluminium and titanium additions stabilize the alloy against intergranular corrosion, even after long-term exposure to high temperatures, making Incoloy 800 washers ideal for cyclic thermal service.
Iron Balance — Mechanical Strength
The iron-rich matrix delivers mechanical strength and ductility, allowing Incoloy 800 washers to maintain preload and resist deformation under high bolt loads and thermal cycling.

Fastener Performance

Incoloy 800 Washers Mechanical Properties & Torque Reference

The table below lists mechanical properties and torque reference for Incoloy 800 Washers per ASTM. Incoloy 800 washers achieve 620 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Bolt SizeRecommended Washer OD (mm)Recommended Washer Thickness (mm)
M12242.5
M16303.0
M20373.0
M24444.0
M30564.0
M36665.0
M42786.0
M48926.0
?? Washer Selection: Always match washer OD and thickness to bolt size and application load. For high-temperature bolting, consult engineering for optimal washer type and dimensions.

Industry Applications

Incoloy 800 Washers Applications — Industries & End Uses

Incoloy 800 Washers from RealBolt are specified across petrochemical furnaces, chemical processing, nuclear, and power generation where very good corrosion resistance and 620 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Incoloy 800 washers are widely used in bolted joints for ethylene cracking furnaces, reformer tube supports, and heat exchanger assemblies in petrochemical plants. Their resistance to carburization and chloride stress corrosion cracking ensures long-term reliability in high-temperature, aggressive process environments.
Flat and spring washers made from Incoloy 800 are specified for superheater header connections, HRSG ductwork, and steam generator bolting where thermal cycling and oxidation resistance are critical for maintaining joint integrity.
Incoloy 800 washers are ideal for securing furnace linings, radiant tube supports, and heat treatment baskets, providing excellent mechanical stability and oxidation resistance at temperatures exceeding 1000°C.
Used in reactors, acid gas scrubbers, and pressure vessel closures, Incoloy 800 washers prevent bolt relaxation and joint leakage in environments containing nitric acid, organic acids, and mixed halides.

Incoloy 800 Washers Standards & International Certifications

Incoloy 800 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, PMI (XRF), NACE MR0175/ISO 15156, and NABL-accredited lab reports — available on request for all orders.
Standards
DIN 125A DIN 126 DIN 127 DIN 128 ISO 7089 ISO 7090 ASME B18.21.1 EN ISO 7089 IS 5372 IS 1367
Certifications
ISO 9001:2015NACE MR0175NABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Incoloy 800 Washers from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Incoloy 800 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
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Answers for Buyers

Incoloy 800 Washers — Frequently Asked Questions

Browse expert answers to common questions about Incoloy 800 Washers from RealBolt — covering grade differences, ASTM B408/B425 standards, oxidation limits, acid resistance, sizes, and MTC documentation. Contact our technical team directly for project-specific guidance on Incoloy 800 washers selection and pricing.
Incoloy 800 washers are available to DIN 125 (flat), DIN 127 (spring lock), DIN 9021 (large OD), ASME B18.22.1 (inch plain and lock), and BS 4320 (Form A-G). Custom dimensions and special forms such as Belleville and tab washers can be supplied to drawing with short lead times.
Yes – Incoloy 800 washers are designed for continuous service up to 1100°C. They retain mechanical strength and resist scaling, carburization, and oxidation in furnace, heat exchanger, and superheater applications where standard stainless steel washers would fail.
Incoloy 800 offers excellent resistance to chloride-induced stress corrosion cracking, making it suitable for use in marine, offshore, and chemical plant environments where exposure to chlorides and high temperatures is common.
No formal MOQ for standard sizes (M6-M36) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes or special washer types have an MOQ of 10 kg or as per drawing. Quantity price breaks are available 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