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Chromium Copper C18200 Studs Manufacturer & Exporter in India

Explore Chromium Copper C18200 Studs 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 Studs?

Chromium Copper C18200 studs are high-conductivity copper alloy fasteners manufactured from UNS C18200 bar stock, conforming to ASTM B743 and RWMA Class 2 standards. 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 enhanced mechanical strength and wear resistance.

Chromium Copper C18200 studs are widely specified for resistance welding equipment, electrical contacts, and high-temperature bolted assemblies where both conductivity and strength are critical. Their excellent resistance to softening at elevated temperatures makes them ideal for demanding industrial applications.

Quick Specifications

MaterialChromium Copper C18200
UNS NumberC18200
DIN Number2.1293
Material StandardASTM B743 / RWMA Class 2
Stud Standard (Metric)DIN 938 / DIN 939 / ISO 898-1
Stud Standard (Inch)ASME B18.31.2
Thread FormISO Metric / UNC / UNF
Diameter RangeM6-M64 / ¼"-2½"
Tensile Strength415-485 MPa (60-70 ksi)
Yield Strength345 MPa (50 ksi) min
HardnessRockwell B75-B100
? All material certified by NABL-accredited laboratory. PMI and conductivity testing available on request.

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 Washers, 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 Washers
Chromium Copper C18200 Threaded Rods

Technical Data

Chromium Copper C18200 Studs Dimensions, Sizes & Thread Standards

Chromium Copper C18200 Studs are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 938 (full thread) / DIN 939 (reduced shank) / ISO 898-1. Custom lengths in 5mm increments. Inch dimensions available per ASME B18.31.2. All Chromium Copper C18200 studs dimensions conform to applicable DIN, ISO, and ASME B18 standards.

Stud Dimensions - Metric (DIN 938 / DIN 939)

Size (M)Pitch (mm)Thread Length (mm)Body Length (mm)Min L (mm)Max L (mm)
M61.0182430200
M81.25223235250
M101.5264040300
M121.75304845400
M162.0386455500
M202.5468065600
M243.0549680600
M303.566120100800
M364.0781441201000
M424.5901681401200
M485.01021921601500
M565.51182241802000
M646.01342562002500

Dimensional & Material Standards

StandardCoversThread
DIN 938Studs, full threadMetric
DIN 939Studs, reduced shankMetric
ISO 898-1Mechanical propertiesMetric
ASME B18.31.2Continuous thread studsUNC/UNF
ASTM B16Stud bolts for flangesUNC
Material StandardRequirement
ASTM B743Bar/rod - UNS C18200
RWMA Class 2Resistance welding
EN 10204 3.1Mill test certificate
EN 10204 3.2TPI-witnessed MTC

Material Chemistry

Chromium Copper C18200 Chemical Composition

Chromium Copper C18200 Studs 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 B743

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. Conductivity and PMI available on request.

Why Chromium Copper C18200 Alloy Composition Matters for Studs

Cr (0.6–1.2%) — Strength & Softening Resistance
Chromium additions allow C18200 studs to retain high strength and resist softening up to 500°C, making them ideal for high-temperature bolted joints and resistance welding applications.
High Copper Content — Conductivity
With over 98% copper, C18200 studs provide excellent electrical and thermal conductivity, essential for current-carrying fasteners and heat transfer assemblies.
Low Impurities — Weldability & Reliability
Strict impurity limits ensure reliable weldability and prevent embrittlement, supporting long service life in demanding electrical and mechanical environments.

Fastener Performance

Chromium Copper C18200 Studs Mechanical Properties & Torque Reference

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

Stud SizeDry (Nm)Lubricated (Nm)Clamp Load (kN)
M12554422
M161108840
M2022017662
M2438030490
M30750600145
M3613001040210
M4220001600280
M4830002400370
?? Anti-seize: Use silver-based or copper-based anti-seize for best thread protection. Lubricated values assume K=0.16. Avoid over-torquing to maintain conductivity.

Industry Applications

Chromium Copper C18200 Studs Applications — Industries & End Uses

Chromium Copper C18200 Studs 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 studs are the industry standard for mounting electrodes, arms, and holders in spot and seam welding machines. Their high conductivity and strength ensure reliable current transfer and mechanical stability under repeated thermal cycling.
Studs for securing furnace linings, radiant tubes, and heat treatment fixtures where high conductivity and resistance to softening at elevated temperatures are required. C18200 maintains strength and shape up to 500°C.
Used as current-carrying studs and connectors in busbar assemblies, switchgear, and transformer terminals. The alloy’s high IACS rating ensures minimal voltage drop and excellent reliability in power distribution systems.
C18200 studs are specified for mold assemblies and ejector systems where rapid heat transfer and mechanical strength are critical for cycle time and dimensional stability.

Chromium Copper C18200 Studs Standards & International Certifications

Chromium Copper C18200 Studs 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 938 DIN 939 DIN 976-1 ASME B18.31.2 IS 1367
Certifications
ISO 9001:2015RWMA CertifiedNABL LabPED 2014/68/EUMTC 3.1 / 3.2

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

Partner with RealBolt — India’s leading manufacturer of certified Chromium Copper C18200 Studs — 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 Studs — Frequently Asked Questions

Browse expert answers to common questions about Chromium Copper C18200 Studs 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 studs selection and pricing.
Chromium Copper C18200 studs are available to DIN 938 (full thread), DIN 939 (reduced shank), ISO 898-1 (mechanical properties), and ASME B18.31.2 (inch continuous thread). For resistance welding, RWMA Class 2 and ASTM B743 are standard. Custom thread forms (BSW, BSF, Whitworth) can be supplied on request.
Use silver-based or copper-based anti-seize compound (such as Jet-Lube SS-30 or Loctite LB 8008) to prevent thread galling and maintain electrical conductivity. Apply to threads and nut bearing faces. Avoid nickel-based anti-seize, as it may reduce conductivity.
Yes – C18200 studs retain their strength and conductivity up to 500°C, making them ideal for furnace fixtures, resistance welding, and other high-temperature bolted assemblies. Their resistance to softening ensures long service life under thermal cycling.
No formal MOQ for standard metric and inch sizes held ex-stock – we supply from single pieces for urgent maintenance. Custom sizes or special thread forms may require a 10 kg minimum. Quantity price breaks 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