Chromium Copper C18200 Nuts Manufacturer & Exporter in India

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

-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 Nuts?

Chromium Copper C18200 nuts are high-conductivity copper alloy fasteners manufactured from UNS C18200 bar or forgings, conforming to ASTM B283 and ASTM B819. This alloy contains 0.6-1.2% chromium, which is precipitation-hardened to deliver a unique combination of high electrical and thermal conductivity with superior mechanical strength and wear resistance.

Chromium Copper C18200 nuts are widely specified for resistance welding electrodes, electrical switchgear, and high-temperature bolted connections where both conductivity and strength are critical. They are non-magnetic, corrosion-resistant, and maintain their properties up to 400°C, making them ideal for demanding electrical and thermal applications.

Quick Specifications

Material	Chromium Copper C18200
UNS Number	C18200
DIN Number	2.1362
Material Standard	ASTM B283 / ASTM B819
Nut Standard (Metric)	DIN 934 / ISO 4032
Nut Standard (Inch)	ASME B18.2.2
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M6-M64 / ¼"-2½"
Tensile Strength	= 415 MPa (60 ksi)
Yield Strength	= 275 MPa (40 ksi)
Hardness	Rockwell B75-B100

? All material certified by NABL-accredited laboratory. Electrical conductivity and PMI 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 Screws, Chromium Copper C18200 Washers, 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 Screws

Chromium Copper C18200 Washers

Chromium Copper C18200 Studs

Chromium Copper C18200 Threaded Rods

Technical Data

Chromium Copper C18200 Nuts Dimensions, Sizes & Thread Standards

Chromium Copper C18200 Nuts are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 934 (hex nut) / ISO 4032. Custom thread pitches and special geometries available. Inch dimensions per ASME B18.2.2. All Chromium Copper C18200 nuts dimensions are verified against applicable DIN, ISO, and ASME B18 standards

Hex Nut Dimensions - Metric (DIN 934 / ISO 4032)

Size (M)	Pitch (mm)	A/F (mm)	Height (mm)
M6	1.0	10	5
M8	1.25	13	6.5
M10	1.5	17	8
M12	1.75	19	10
M16	2.0	24	13
M20	2.5	30	16
M24	3.0	36	19
M30	3.5	46	24
M36	4.0	55	29
M42	4.5	65	34
M48	5.0	75	38
M56	5.5	85	45
M64	6.0	95	51

Dimensional & Material Standards

Standard	Covers	Thread
DIN 934	Hex nuts	Metric
ISO 4032	Hex nuts	Metric
ASME B18.2.2	Hex & heavy hex nuts	UNC/UNF
ISO 2320	Prevailing torque nuts	Metric

Material Standard	Requirement
ASTM B283	Forgings/bar - UNS C18200
ASTM B819	Seamless tube - C18200
EN 12163	Rod/bar - CuCr1Zr
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

Chromium Copper C18200 Chemical Composition

Chromium Copper C18200 Nuts 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 B283

Element	Composition (%)
Copper (Cu)	Balance
Chromium (Cr)	0.6-1.2
Iron (Fe)	0.10 max
Silicon (Si)	0.10 max
Zinc (Zn)	0.05 max
Lead (Pb)	0.02 max
Total Impurities	0.50 max

? All heats verified by NABL-accredited spectrometry. Electrical conductivity test available on request.

Why Chromium Copper C18200 Alloy Composition Matters for Nuts

Chromium (0.6–1.2%) — Strength & Softening Resistance

Chromium addition enables precipitation hardening, giving C18200 nuts much higher strength and softening resistance than pure copper, while retaining high conductivity.

High Copper Content — Conductivity

With over 98% copper, C18200 nuts maintain electrical conductivity =80% IACS, making them ideal for electrical and resistance welding applications.

Low Impurities — Weldability & Corrosion Resistance

Strict impurity limits ensure excellent weldability and resistance to hydrogen embrittlement, critical for nuts used in electrical and thermal cycling environments.

Fastener Performance

Chromium Copper C18200 Nuts Mechanical Properties & Torque Reference

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

Nut Size	Recommended Torque (Nm)	Clamp Load (kN)
M8	18	12
M10	36	19
M12	62	28
M16	150	55
M20	295	85
M24	510	120
M30	1020	190

?? Anti-seize: Use silver-based or copper-based anti-seize for high-temperature or electrical applications. Lubricated values assume K=0.18.

Industry Applications

Chromium Copper C18200 Nuts Applications — Industries & End Uses

Chromium Copper C18200 Nuts 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.

Resistance Welding & Electrical Equipment

Resistance Welding Electrodes & Fixtures

Chromium Copper C18200 nuts are the industry standard for securing resistance welding electrodes, arms, and holders. Their high conductivity and strength ensure reliable current transfer and mechanical stability under repeated thermal cycling.

Switchgear & Busbar Connections

Used in high-current switchgear, busbar joints, and transformer terminals, C18200 nuts provide low-resistance, high-strength bolted connections that maintain integrity under electrical load and vibration.

Furnace & Induction Heating Assemblies

Ideal for securing induction coils, furnace terminals, and high-temperature electrical contacts, where both conductivity and resistance to softening at elevated temperatures are required.

Railway & Traction Power Systems

Chromium Copper C18200 Nuts Standards & International Certifications

Chromium Copper C18200 Nuts 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 934 ISO 4032 ASME B18.2.2 BS 1768 BS EN ISO 4032 IS 1367

Certifications

DIN 2.1362EN 12163

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

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

Answers for Buyers

Chromium Copper C18200 Nuts — Frequently Asked Questions

Browse expert answers to common questions about Chromium Copper C18200 Nuts 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 nuts selection and pricing.

Free technical consultation for electrical applications
Mill Test Certificate included
Export documentation handled
Sample orders accepted
Fast Turnaround Quotations
Competitive Factory Pricing
Electrical & Thermal Guidance
Dedicated Engineering Support

What standards are available for Chromium Copper C18200 nuts?

Chromium Copper C18200 nuts are available to DIN 934 (metric hex), ISO 4032, and ASME B18.2.2 (inch hex and heavy hex). Custom prevailing torque and slotted nut designs can be supplied per ISO 2320 or customer drawing. All nuts are manufactured from ASTM B283 or EN 12163 certified material.

What anti-seize should I use on Chromium Copper C18200 nuts?

For electrical and high-temperature applications, use a silver-based or copper-based anti-seize compound (such as Jet-Lube SS-30 or Loctite LB 8008). This prevents galling and ensures consistent torque. Avoid nickel-based anti-seize if electrical conductivity at the joint is critical.

Are Chromium Copper C18200 nuts suitable for high-current or welding applications?

Yes - C18200 nuts are specifically designed for high-current bolted joints, resistance welding electrodes, and fixtures. Their high conductivity (=80% IACS) and strength make them ideal for repeated thermal cycling and electrical load without softening or loosening.

What is the minimum order quantity (MOQ) for Chromium Copper C18200 nuts?

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Ahmedabad
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