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Inconel 800 Washers Manufacturer & Exporter in India

Explore Inconel 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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-200

Min Temp

1200

Max Temp

🌡

1200

Suitable for continuous service up to approximately 1200°C under typical operating conditions.

⚡

760

Typical tensile strength around 760 MPa depending on product form and heat treatment.

🛡

Excellent

Excellent corrosion resistance in a wide range of industrial environments.

⚖

8.4

Typical density is approximately 8.4 g/cm³.

Product Overview

What are Inconel 800 Washers?

Inconel 800 washers are nickel-iron-chromium alloy fastener components manufactured from UNS N08800 bar or plate stock conforming to ASTM B409 and ASTM B564. The alloy’s balanced composition of nickel (30-35%), chromium (19-23%), and iron (balance) delivers exceptional resistance to oxidation, carburization, and high-temperature creep in continuous service up to 1100°C.

Inconel 800 washers are specified under ASME Section VIII and NACE MR0175 for pressure vessel flange assemblies, heat exchanger tube sheet connections, and high-temperature furnace hardware. Their dimensional stability under thermal cycling and resistance to stress corrosion cracking in chloride-bearing environments make them the preferred choice over austenitic stainless steel washers in demanding process industries worldwide.

Quick Specifications

MaterialInconel 800
UNS NumberN08800
DIN Number1.4876
Material StandardASTM B409 / ASTM B564
Washer Standard (Metric)DIN 125 / DIN 9021 / ISO 7089
Washer Standard (Inch)ASME B18.22.1 / ASME B18.21.1
Types AvailableFlat / Spring / Fender / Taper / Dock
Diameter RangeM6-M100 / ¼"-4"
Tensile Strength517 MPa (75 ksi) min
Yield Strength207 MPa (30 ksi) min
HardnessMax 35 HRC / 200 HB
? All material certified by NABL-accredited laboratory. PMI available on request.

Complete the Fastener Set

Other Inconel 800 Fastener Products Available from RealBolt

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

Technical Data

Inconel 800 Washers Dimensions, Sizes & Thread Standards

Inconel 800 Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat washers) / DIN 9021 (large OD) / ISO 7089. Custom OD and thickness available. Inch dimensions per ASME B18.22.1. All Inconel 800 washers dimensions are verified against applicable DIN, ISO, and ASME B18

Flat Washer Dimensions - Metric (DIN 125 / ISO 7089)

Bolt Size (M)ID (mm)OD (mm)Thickness (mm)OD Large Series (mm)
M66.4121.618
M88.4161.624
M1010.5202.030
M1213.0242.537
M1617.0303.050
M2021.0373.060
M2425.0444.072
M3031.0564.092
M3637.0665.0110
M4243.0787.0125
M4850.0928.0145
M5658.01059.0168
M6466.01159.0185
M7274.012510.0200
M8082.014012.0220
M100104.017514.0270

Dimensional & Material Standards

StandardCoversSystem
DIN 125Flat washers, normal seriesMetric
DIN 9021Flat washers, large OD seriesMetric
ISO 7089Plain washers, normal seriesMetric
ISO 7093Plain washers, large seriesMetric
ASME B18.22.1Plain washersInch
ASME B18.21.1Spring lock washersInch
MSS SP-75High-pressure flange washersInch
Material StandardRequirement
ASTM B409Plate/sheet - UNS N08800
ASTM B564Forgings - UNS N08800
ASTM F432Washer mechanical properties
NACE MR0175Sour service =35 HRC
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Inconel 800 Chemical Composition

Inconel 800 Washers are manufactured from a nickel-chromium superalloy containing nickel (72% min), chromium (14–17%), and iron (6–10%). Each element is precisely controlled per ASTM — nickel provides chloride SCC immunity, chromium drives high-temperature oxidation resistance, and iron balances structural stability and alloy cost.

Chemical Composition per ASTM B409 / ASTM B564

ElementComposition (%)
Nickel (Ni)30.0-35.0%
Chromium (Cr)19.0-23.0%
Iron (Fe)Balance (min 39.5%)
Carbon (C)0.10% max
Aluminium (Al)0.15-0.60%
Titanium (Ti)0.15-0.60%
Manganese (Mn)1.50% max
Silicon (Si)1.00% max
Sulphur (S)0.015% max
Copper (Cu)0.75% max
? All heats verified by NABL-accredited spectrometry. PMI available on request.

Why Inconel 800 Alloy Composition Matters for Washers

Ni (30–35%) + Cr (19–23%) — Oxidation & Carburization Resistance
The nickel-chromium balance in Inconel 800 forms a stable, adherent chromia scale that resists oxidation up to 1100°C and prevents carbon ingress in carburizing atmospheres — critical for washers used in furnace hardware and heat treatment fixtures where bearing surfaces must remain dimensionally stable.
Al + Ti (0.15–0.60% each) — Creep Strength
Aluminium and titanium additions promote gamma-prime precipitation at elevated temperatures, significantly improving creep rupture strength. Washers under sustained bolt load in high-temperature flanges resist relaxation and maintain clamping force over long service intervals.
Iron Balance — Cost-Effective High-Temperature Performance
The high iron content (minimum 39.5%) distinguishes Inconel 800 from higher-nickel alloys and provides a cost-effective solution for applications requiring oxidation resistance and moderate corrosion resistance without the premium of alloys 625 or 825. This makes Inconel 800 washers the standard choice for petrochemical furnace tubing flanges and HRSG connections.

Fastener Performance

Inconel 800 Washers Mechanical Properties & Torque & Proof Load Reference

The table below lists mechanical properties and proof load reference for Inconel 800 Washers per ASTM. Inconel 800 washers achieve 760 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Washer Bearing Load Reference - Metric Flat Washers (DIN 125)

Washer SizeID (mm)OD (mm)Thickness (mm)Max Bearing Load (kN)
M1213.0242.518
M1617.0303.032
M2021.0373.052
M2425.0444.076
M3031.0564.0122
M3637.0665.0178
M4243.0787.0245
M4850.0928.0322
?? Installation note: Always use nickel-based anti-seize on mating bolt threads when pairing Inconel 800 washers with Inconel or stainless steel bolts. Bearing load values are indicative at ambient temperature; consult engineering for elevated-temperature applications above 600°C.

Industry Applications

Inconel 800 Washers Applications — Industries & End Uses

Inconel 800 Washers from RealBolt are specified across oil and gas, aerospace, chemical processing, and power generation where excellent corrosion resistance and 760 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Inconel 800 washers are the standard specification for tube support hangers, radiant coil flange connections, and burner assembly hardware in ethylene cracking furnaces, reformer heaters, and crude distillation unit fired heaters. Their resistance to carburization and oxidation at continuous service temperatures up to 1100°C prevents washer deformation and loss of bolt preload during thermal cycling.
Flat and large-OD washers for tube sheet flange connections, channel cover assemblies (TEMA Class B/C), and heat recovery steam generator duct flanges. Inconel 800 washers maintain dimensional stability under sustained thermal load and resist stress corrosion cracking in steam-side environments where austenitic stainless steel washers are susceptible to failure.
Washer sets for reactor closure flanges, nozzle connections, and agitator shaft sealing assemblies in organic acid, mixed halide, and high-temperature hydrocarbon process environments. Specified where operating temperatures exceed the practical limit of 316L stainless steel washers (approximately 450°C continuous) and where creep relaxation of the washer bearing surface must be minimised.
Inconel 800 washers are used in superheater and reheater header flange connections, main steam valve body assemblies, and boiler drum manway cover hardware in coal-fired and combined-cycle power plants. The alloy’s resistance to steam oxidation and sulphidation at elevated temperatures ensures long service intervals between flange maintenance shutdowns.

Inconel 800 Washers Standards & International Certifications

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

Partner with RealBolt — India’s leading manufacturer of certified Inconel 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.
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Answers for Buyers

Inconel 800 Washers — Frequently Asked Questions

Browse expert answers to common questions about Inconel 800 Washers from RealBolt — covering ASTM standards, max service temperature, corrosion resistance, available sizes, lead times, and MTC certification. Contact our technical team directly for project-specific guidance on Inconel 800 washers selection and pricing.
Inconel 800 flat washers are manufactured to DIN 125 (normal series), DIN 9021 (large OD series), ISO 7089, and ISO 7093. Inch-series washers are produced per ASME B18.22.1 (plain washers) and ASME B18.21.1 (spring lock washers). Custom OD, ID, and thickness combinations are available for non-standard flange applications with a 15 working day lead time. All dimensions are verified against the applicable standard before dispatch.
Inconel 800 washers are rated for continuous service up to 1100°C in oxidizing atmospheres and up to 1000°C in carburizing or reducing atmospheres. In cyclic thermal service – such as furnace door flanges or heat treatment retort covers – the alloy maintains dimensional stability and resists scaling through repeated heating and cooling cycles. For applications above 900°C requiring higher creep rupture strength, Inconel 800H or 800HT (UNS N08810 / N08811) variants with controlled carbon and grain size are recommended.
Yes – Inconel 800 washers in the annealed condition with hardness not exceeding 35 HRC comply with NACE MR0175 / ISO 15156 for use in H2S-containing sour service environments. They are specified for flange assemblies in gas processing, amine treating, and sour crude handling systems where both corrosion resistance and high-temperature capability are required simultaneously. Hardness survey reports are available on request for sour service orders.
Inconel 800 and austenitic stainless steels (316L, 321, 347) are closely matched in the galvanic series, making them compatible in most process environments without significant galvanic corrosion risk. In seawater or highly conductive electrolytes, a small potential difference exists and nickel-based anti-seize compound should be applied to the washer bearing face. For offshore or marine applications requiring full galvanic compatibility, pairing Inconel 800 washers with Inconel 800 or Alloy 825 bolts and nuts is recommended.

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
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Countries We Export To:

  • US
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