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Chromium Copper C18200 Washers Manufacturer & Exporter in India

Explore Chromium Copper C18200 Washers Manufacturer & Exporter in India manufactured for demanding industrial applications with reliable strength, corrosion resistance and compliance with international standards.
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-100

Min Temp

260

Max Temp

🌡

260

Suitable for continuous service up to approximately 260°C under typical operating conditions.

⚡

220

Typical tensile strength around 220 MPa depending on product form and heat treatment.

🛡

Good

Good corrosion resistance in a wide range of industrial environments.

⚖

8.96

Typical density is approximately 8.96 g/cm³.

Product Overview

What are Chromium Copper C18200 Washers?

Chromium Copper C18200 washers are high-conductivity copper alloy flat washers manufactured from UNS C18200 bar or sheet, conforming to ASTM B152 and ASTM B470. This alloy contains approximately 0.6-1.2% chromium, which is precipitation-hardened to deliver a unique combination of high electrical and thermal conductivity with excellent mechanical strength and wear resistance.

Chromium Copper C18200 washers are widely specified for electrical contacts, resistance welding electrodes, and high-temperature bolted joints where both conductivity and strength are critical. They are non-magnetic, corrosion-resistant, and maintain their properties at elevated temperatures, making them ideal for demanding industrial and electrical applications.

Quick Specifications

MaterialChromium Copper
UNS NumberC18200
DIN Number2.1293
Material StandardASTM B152 / ASTM B470
Washer Standard (Metric)DIN 125 / DIN 9021 / ISO 7089
Washer Standard (Inch)ASME B18.22.1
TypeFlat, Spring, Belleville, Tab
Size RangeM3-M64 / 1/8"-2.5"
Tensile Strength= 415 MPa (60 ksi)
Yield Strength= 345 MPa (50 ksi)
Hardness80-120 HB
? All material certified by NABL-accredited laboratory. Electrical conductivity tested per ASTM B193.

Complete the Fastener Set

Other Chromium Copper C18200 Fastener Products Available from RealBolt

RealBolt also manufactures the complete Chromium Copper C18200 fastener range from certified copper alloy bar stock, including Chromium Copper C18200 Bolts, Chromium Copper C18200 Nuts, Chromium Copper C18200 Screws, Chromium Copper C18200 Studs, and Chromium Copper C18200 Threaded Rods. All Chromium Copper C18200 fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Chromium Copper C18200 Bolts
Chromium Copper C18200 Nuts
Chromium Copper C18200 Screws
Chromium Copper C18200 Studs
Chromium Copper C18200 Threaded Rods

Technical Data

Chromium Copper C18200 Washers Dimensions, Sizes & Thread Standards

Chromium Copper C18200 Washers are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 125 (flat), DIN 9021 (large OD), ISO 7089 (plain), and ASME B18.22.1 (inch). Custom OD/ID and thickness available on request. All Chromium Copper C18200 washers dimensions are verified against applicable DIN, ISO, and ASME

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

Size (M)Inner Dia (mm)Outer Dia (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

Dimensional & Material Standards

StandardCoversType
DIN 125Flat washersMetric
DIN 9021Large OD washersMetric
ISO 7089Plain washersMetric
ASME B18.22.1Plain & lock washersInch
DIN 127Spring washersMetric
DIN 6796Belleville washersMetric
Material StandardRequirement
ASTM B152Plate/sheet - UNS C18200
ASTM B470Forgings - UNS C18200
EN 12163Rod/bar - CW106C
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Chromium Copper C18200 Chemical Composition

Chromium Copper C18200 Washers are produced from either tin-stabilized Naval Brass C46400 or aluminium-nickel-iron Aluminium Bronze C63000, with elemental limits per ASTM and MIL-B-24059. Tin (0.5–1%) in Naval Brass prevents dezincification in seawater; aluminium and nickel additions in Al Bronze C63000 provide non-sparking ATEX Zone 1 compliance.

Chemical Composition per ASTM B152 / B470

ElementComposition (%)
Copper (Cu)Balance
Chromium (Cr)0.6-1.2
Iron (Fe)0.10 max
Silicon (Si)0.10 max
Nickel (Ni)0.20 max
Zinc (Zn)0.05 max
Lead (Pb)0.02 max
Total Impurities0.50 max
? All heats verified by NABL-accredited spectrometry. Electrical conductivity tested per ASTM B193.

Why Chromium Copper C18200 Alloy Composition Matters for Washers

Chromium (0.6–1.2%) — Strength & Softening Resistance
Chromium addition enables precipitation hardening, giving C18200 washers high strength and resistance to softening at elevated temperatures, ideal for resistance welding and high-load electrical joints.
High Copper Content — Conductivity
With over 98% copper, C18200 washers retain excellent electrical and thermal conductivity, ensuring minimal voltage drop and efficient heat dissipation in busbar and terminal applications.
Low Impurities — Corrosion Resistance
Strict impurity limits ensure C18200 washers resist tarnishing and corrosion, even in humid or industrial atmospheres, making them reliable for long-term service in electrical assemblies.

Fastener Performance

Chromium Copper C18200 Washers Mechanical Properties & Torque & Proof Load Reference

The table below lists mechanical properties and proof load reference for Chromium Copper C18200 Washers per ASTM. Chromium Copper C18200 washers achieve 220 MPa tensile strength, with hardness, yield, and elongation values verified by NABL-accredited testing and reported in the EN 10204 MTC.

Washer SizeRecommended Bolt Torque (Nm)Max Load (kN)
M687.5
M82012.5
M104020
M127030
M1617060
M2034095
M24580140
M301150220
?? Note: Use clean, flat surfaces for optimal conductivity. Avoid over-tightening to prevent deformation of copper washers.

Industry Applications

Chromium Copper C18200 Washers Applications — Industries & End Uses

Chromium Copper C18200 Washers from RealBolt are specified across marine hardware, ATEX hazardous areas, and naval defence where good corrosion resistance and 220 MPa tensile strength are required for reliable fastener performance. Click each industry below for detailed application examples.
Chromium Copper C18200 washers are widely used in high-current switchgear, busbar joints, and transformer terminals, where their high conductivity and mechanical strength ensure reliable, low-resistance connections under thermal cycling and vibration.
Flat and domed washers for resistance welding electrodes, arms, and holders, providing excellent wear resistance and minimal softening at elevated temperatures, ensuring consistent weld quality and long service life.
Used in bolted joints for railway electrification, traction substations, and overhead line equipment, where high conductivity and resistance to mechanical fatigue are essential for safety and reliability.
C18200 washers are specified for generator terminal connections, turbine busbars, and high-load bolted joints in power plants, supporting efficient current flow and heat dissipation.

Chromium Copper C18200 Washers Standards & International Certifications

Chromium Copper C18200 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, Lloyds Register or DNV certification, MIL specification documentation, and PMI (XRF) reports — available on request for all orders.
Standards
DIN 125A DIN 126 DIN 127 ISO 7089 ISO 7090 ASME B18.21.1 BS 4320 IS 5372 IS 1367
Certifications
ISO 9001:2015RoHS CompliantNABL LabPED 2014/68/EUMTC 3.1 / 3.2

Buy Chromium Copper C18200 Washers from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Chromium Copper C18200 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

Chromium Copper C18200 Washers — Frequently Asked Questions

Browse expert answers to common questions about Chromium Copper C18200 Washers from RealBolt — covering alloy selection, ATEX Zone 1 compliance, dezincification resistance, ASTM standard, sizes, and EN 10204 documentation. Contact our technical team directly for project-specific guidance on Chromium Copper C18200 washers selection and pricing.
Chromium Copper C18200 washers are available to DIN 125 (flat), DIN 9021 (large OD), ISO 7089 (plain), DIN 127 (spring), and ASME B18.22.1 (inch). Custom shapes such as Belleville, tab, and slotted washers can be manufactured to drawing or sample with short lead times.
Yes – C18200 washers offer =80% IACS conductivity and high mechanical strength, making them ideal for busbar joints, transformer terminals, and switchgear connections where low resistance and reliable clamping are critical.
Yes – C18200 washers retain strength and conductivity up to 400°C, making them suitable for resistance welding, furnace, and high-temperature electrical applications. For continuous service above 350°C, consult our engineering team for guidance.
No formal MOQ for standard sizes (M6-M24) held ex-stock. Custom sizes or special shapes may require a 5 kg minimum. Sample and prototype orders are accepted. Quantity price breaks at 100, 500, and 1000 pieces.

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