Chromium Copper C18200 Screws Manufacturer & Exporter in India

Explore Chromium Copper C18200 Screws 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 Screws?

Chromium Copper C18200 screws are high-conductivity copper alloy fasteners manufactured from UNS C18200 bar or wire, conforming to ASTM B170 and ASTM B187. This alloy, containing 0.6-1.2% chromium, is precipitation-hardened to deliver a unique combination of high electrical and thermal conductivity with superior mechanical strength and wear resistance.

Chromium Copper C18200 screws are widely specified for resistance welding electrodes, electrical connectors, and high-temperature hardware where both conductivity and durability are critical. Their excellent resistance to softening at elevated temperatures makes them ideal for demanding electrical and thermal cycling environments.

Quick Specifications

Material	Chromium Copper C18200
UNS Number	C18200
DIN Number	2.1362
Material Standard	ASTM B170 / ASTM B187
Screw Standard (Metric)	DIN 912 / DIN 933 / ISO 4762
Screw Standard (Inch)	ASME B18.3 / ASME B18.6.3
Thread Form	ISO Metric / UNC / UNF
Diameter Range	M3-M36 / 1/8"-1½"
Tensile Strength	415-485 MPa (60-70 ksi)
Yield Strength	345 MPa (50 ksi) min
Hardness	95-130 HB

? 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 Nuts, 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 Nuts

Chromium Copper C18200 Washers

Chromium Copper C18200 Studs

Chromium Copper C18200 Threaded Rods

Technical Data

Chromium Copper C18200 Screws Dimensions, Sizes & Thread Standards

Chromium Copper C18200 Screws are available in metric M6–M100 and inch ¼″–4″ as standard. Per DIN 912 (socket head cap), DIN 933 (hex head full thread), ISO 4762, and ASME B18.3. Custom lengths and thread forms available. Inch dimensions per ASME B18.6.3.

Socket Head Cap Screw Dimensions - Metric (DIN 912 / ISO 4762)

Size (M)	Pitch (mm)	Head Dia (mm)	Head Ht (mm)	Hex Socket (mm)	Min L (mm)	Max L (mm)
M3	0.5	5.5	3.0	2.5	6	50
M4	0.7	7.0	4.0	3.0	8	60
M5	0.8	8.5	5.0	4.0	10	70
M6	1.0	10.0	6.0	5.0	12	80
M8	1.25	13.0	8.0	6.0	16	100
M10	1.5	16.0	10.0	8.0	20	120
M12	1.75	18.0	12.0	10.0	25	150
M16	2.0	24.0	16.0	14.0	30	200
M20	2.5	30.0	20.0	17.0	35	250
M24	3.0	36.0	24.0	19.0	40	300
M30	3.5	45.0	30.0	22.0	50	400
M36	4.0	54.0	36.0	27.0	60	500

Dimensional & Material Standards

Standard	Covers	Thread
DIN 912	Socket head cap screws	Metric
DIN 933	Hex head screws, full thread	Metric
ISO 4762	Socket head cap screws	Metric
ASME B18.3	Socket cap, set screws	UNC/UNF
ASME B18.6.3	Machine screws	UNC/UNF

Material Standard	Requirement
ASTM B170	Bar/rod - UNS C18200
ASTM B187	Rod/wire - UNS C18200
ASTM F468	Fastener mechanical
EN 10204 3.1	Mill test certificate
EN 10204 3.2	TPI-witnessed MTC

Material Chemistry

Chromium Copper C18200 Chemical Composition

Chromium Copper C18200 Screws 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 B170

Element	Composition (%)
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
Phosphorus (P)	0.02% max

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

Why Chromium Copper C18200 Alloy Composition Matters for Screws

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

Chromium addition enables precipitation hardening, giving C18200 screws high strength and excellent resistance to softening at elevated temperatures, making them ideal for resistance welding and high-heat electrical applications.

High Copper Content — Conductivity

With over 98% copper, C18200 screws maintain high electrical (=80% IACS) and thermal conductivity, ensuring minimal energy loss in electrical connections and heat transfer assemblies.

Trace Elements — Purity & Weldability

Low levels of iron, silicon, and nickel ensure excellent weldability and corrosion resistance, critical for electrical and thermal cycling environments.

Fastener Performance

Chromium Copper C18200 Screws Mechanical Properties & Torque Reference

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

Screw Size	Dry (Nm)	Lubricated (Nm)	Clamp Load (kN)
M6	7.5	6.0	7.5
M8	18	14	13
M10	36	29	21
M12	62	50	30
M16	150	120	60
M20	295	236	95
M24	510	410	140

?? Anti-seize: Use silver-based or copper-based anti-seize for copper alloy screws. Lubricated values assume K=0.16. Avoid nickel-based anti-seize for electrical applications.

Industry Applications

Chromium Copper C18200 Screws Applications — Industries & End Uses

Chromium Copper C18200 Screws 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.

Electrical & Thermal Equipment

Resistance Welding & Electrodes

Chromium Copper C18200 screws are the preferred fastener for resistance welding electrodes, electrode holders, and secondary circuit connections. Their high conductivity and softening resistance ensure reliable performance under repeated thermal cycling and high current loads.

Power Distribution & Busbars

Used for bolting copper busbars, switchgear, and transformer connections, C18200 screws provide low-resistance, high-strength joints that maintain conductivity and mechanical integrity over long service life.

Furnace & Heat Treatment Hardware

Ideal for securing furnace fixtures, heating element terminals, and high-temperature connectors, where both thermal conductivity and mechanical strength are required at elevated temperatures.

Railway & Traction Systems

Chromium Copper C18200 Screws Standards & International Certifications

Chromium Copper C18200 Screws 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 912 DIN 913 DIN 914 DIN 915 DIN 916 ISO 4762 ASME B18.3 IS 1367

Certifications

DIN 2.1362EN 12163

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

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

Browse expert answers to common questions about Chromium Copper C18200 Screws 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 screws selection and pricing.

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

What screw standards are available for Chromium Copper C18200 screws?

Chromium Copper C18200 screws are available to DIN 912 (socket head cap), DIN 933 (hex head full thread), ISO 4762, and ASME B18.3 (inch socket cap). Machine screws are supplied per ASME B18.6.3. Custom thread forms (BSW, BA, Whitworth) can be manufactured on request with a typical lead time of 10-15 working days.

What anti-seize compound should I use with Chromium Copper C18200 screws?

Use a silver-based or copper-based anti-seize compound (such as Loctite LB 771 or Jet-Lube Kopr-Kote) for C18200 screws, especially in high-current or high-temperature applications. Avoid nickel-based anti-seize for electrical joints to prevent galvanic corrosion and conductivity loss.

Are Chromium Copper C18200 screws suitable for high-current electrical connections?

Yes - C18200 screws offer =80% IACS electrical conductivity and excellent resistance to softening, making them ideal for busbar joints, transformer terminals, and resistance welding assemblies. Their mechanical strength ensures secure, low-resistance connections even under thermal cycling.

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

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