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Copper C12200 (DHP) Washers Manufacturer & Exporter in India

Explore Copper C12200 (DHP) 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 Copper C12200 (DHP) Washers?

Copper C12200 (DHP) washers are precision flat or shaped fastener components manufactured from phosphorus-deoxidized, high residual phosphorus copper, conforming to ASTM B152 and UNS C12200. These washers are renowned for their excellent thermal and electrical conductivity, ductility, and corrosion resistance, making them ideal for electrical, plumbing, and HVAC applications.

With a minimum copper content of 99.9% and residual phosphorus for enhanced weldability, Copper C12200 washers are non-magnetic and exhibit outstanding resistance to hydrogen embrittlement. They are widely specified for use in electrical busbar assemblies, heat exchanger tube sheets, and water distribution systems where reliable sealing and conductivity are critical.

Quick Specifications

MaterialCopper C12200 (DHP)
UNS NumberC12200
DIN Number2.0090
Material StandardASTM B152
Washer Standard (Metric)DIN 125 / DIN 9021 / ISO 7089
Washer Standard (Inch)ASME B18.22.1
FormFlat, Spring, Sealing, Tab
Diameter RangeM3-M100 / 1/8"-4"
Tensile Strength210 MPa (30 ksi) min
Yield Strength69 MPa (10 ksi) min
Hardness45-80 HV (Annealed)
? All material certified by NABL-accredited laboratory. PMI and conductivity testing available on request.

Complete the Fastener Set

Other Copper C12200 (DHP) Fastener Products Available from RealBolt

RealBolt also manufactures the complete Copper C12200 (DHP) fastener range from certified copper alloy bar stock, including Copper C12200 (DHP) Bolts, Copper C12200 (DHP) Nuts, Copper C12200 (DHP) Screws, Copper C12200 (DHP) Studs, and Copper C12200 (DHP) Threaded Rods. All Copper C12200 (DHP) fastener types are produced to ASTM with full EN 10204 MTC 3.1/3.2 documentation.
Copper C12200 (DHP) Bolts
Copper C12200 (DHP) Nuts
Copper C12200 (DHP) Screws
Copper C12200 (DHP) Studs
Copper C12200 (DHP) Threaded Rods

Technical Data

Copper C12200 (DHP) Washers Dimensions, Sizes & Thread Standards

Copper C12200 (DHP) 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 thicknesses available. All Copper C12200 (DHP) washers dimensions are verified against applicable DIN, ISO, and ASME B18 standards

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

Size (M)Inner Ø (mm)Outer Ø (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
M7273.013010.0
M8081.014010.0
M100101.018012.0

Dimensional & Material Standards

StandardCoversForm
DIN 125Flat washersMetric
DIN 9021Large OD washersMetric
ISO 7089Plain washersMetric
ASME B18.22.1Plain & lock washersInch
BS 4320Metric washersMetric
Material StandardRequirement
ASTM B152Plate/sheet - UNS C12200
ASTM B62Forged copper alloy
EN 1652Copper sheet/strip
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Copper C12200 (DHP) Chemical Composition

Copper C12200 (DHP) 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

ElementComposition (%)
Copper (Cu)99.9% min
Phosphorus (P)0.015-0.040%
Silver (Ag)0.002% max
Oxygen (O)0.040% max
Other Elements0.05% max (total)
? All heats verified by NABL-accredited spectrometry. Conductivity and PMI available on request.

Why Copper C12200 (DHP) Alloy Composition Matters for Washers

High Copper Content — Conductivity
The 99.9% copper content ensures exceptional electrical and thermal conductivity, making C12200 washers ideal for electrical busbar, transformer, and switchgear assemblies.
Phosphorus — Weldability & Hydrogen Resistance
Phosphorus deoxidation improves weldability and prevents hydrogen embrittlement, allowing C12200 washers to be brazed or soldered without risk of cracking or porosity.
Low Oxygen — Corrosion Resistance
Controlled oxygen content enhances resistance to corrosion in potable water, steam, and mildly acidic environments, making these washers suitable for plumbing and HVAC systems.

Fastener Performance

Copper C12200 (DHP) Washers Mechanical Properties & Torque & Proof Load Reference

The table below lists mechanical properties and proof load reference for Copper C12200 (DHP) Washers per ASTM. Copper C12200 (DHP) 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 Torque (Nm)Max Clamp Load (kN)
M662.5
M8154.5
M10307.0
M125010.0
M1612018.0
M2024028.0
M2440042.0
?? Soft Metal: Copper washers deform under load to provide a tight seal. Do not overtighten. Use with compatible fasteners for optimal performance.

Industry Applications

Copper C12200 (DHP) Washers Applications — Industries & End Uses

Copper C12200 (DHP) 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.
Copper C12200 (DHP) washers are widely used in electrical busbar assemblies, switchgear, transformer terminals, and earthing systems. Their high conductivity ensures minimal voltage drop and reliable current transfer at bolted joints, making them essential in substations and power panels.
Flat and sealing washers in C12200 are specified for potable water fittings, pipe flanges, and valve assemblies. Their corrosion resistance and non-toxicity make them ideal for municipal water distribution, desalination plants, and HVAC systems.
Copper washers are used in tube sheet assemblies, condenser end plates, and refrigeration systems for their thermal conductivity and ability to maintain leak-tight seals under thermal cycling.
C12200 washers are used as crush washers for oil drain plugs, brake line fittings, and fuel system connections, providing reliable sealing and corrosion resistance in automotive and heavy equipment applications.

Copper C12200 (DHP) Washers Standards & International Certifications

Copper C12200 (DHP) 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 Copper C12200 (DHP) Washers from India's Leading Manufacturer — Get a Competitive Quote Today

Partner with RealBolt — India’s leading manufacturer of certified Copper C12200 (DHP) 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

Copper C12200 (DHP) Washers — Frequently Asked Questions

Browse expert answers to common questions about Copper C12200 (DHP) 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 Copper C12200 (DHP) washers selection and pricing.
Copper C12200 (DHP) washers are available to DIN 125 (flat), DIN 9021 (large OD), ISO 7089 (plain), ASME B18.22.1 (inch), and BS 4320 (metric). Custom shapes such as tab, spring, and sealing washers can be manufactured to drawing or sample with short lead times.
Yes – Copper C12200 (DHP) washers offer 97% IACS conductivity and are ideal for busbar joints, transformer terminals, and switchgear connections. Their high copper content ensures minimal resistance and reliable current transfer. Ensure surfaces are clean and free from oxide for best performance.
Absolutely. C12200 washers are non-toxic, corrosion resistant, and approved for potable water contact under international plumbing codes. They are widely used in municipal water supply, desalination, and HVAC systems for leak-tight, long-life sealing.
No MOQ for standard sizes (M6-M24) held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes or shapes have an MOQ of 5 kg or 100 pcs. Price breaks at 100, 500, and 1000 pcs for large projects.

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