Name: Chromium Zirconium Copper (CuCrZr / CuCr1Zr)
Brand: R V Metal Corporation
Availability: InStock

Chromium Zirconium Copper (CuCrZr) Sheets, Rods, Bars & Plates

Product Overview

R V Metal Corporation supplies Chromium Zirconium Copper (CuCrZr) in sheets, plates, rods, and bars for applications that demand a rare combination of high electrical/thermal conductivity and high strength at elevated temperatures. CuCrZr is widely selected for resistance welding components and high-duty electrical parts because it offers better softening resistance and longer service life than standard ETP/DHP copper under heat and load. We offer supply in solution treated / aged conditions (as required), with tight dimensional control, consistent mechanical properties, and full traceability for OEM and EPC procurement. Typical uses include welding electrodes, electrode holders, spot/seam welding arms, current-carrying parts, busbar connectors, heat sinks, and high-load electrical contacts.

Technical Specifications

Parameter	Specification / Typical Range
Material Name	Chromium Zirconium Copper (CuCrZr)
UNS Designation	C18150
EN / DIN Designation	CuCr1Zr (EN CW106C)
Available Product Forms	Sheets, Plates, Rods, Round Bars, Flats, Custom Machined Sections
Manufacturing Process	Hot Rolled / Cold Rolled / Extruded / Drawn (Form Dependent)
Heat Treatment Condition	Solution Treated (ST), Aged (AT), ST + AT (Precipitation Hardened)
Thickness Range (Sheets / Plates)	0.5 mm to 80 mm
Diameter Range (Rods / Bars)	6 mm to 250 mm
Width Range (Plates / Flats)	Up to 1000 mm (custom widths available)
Standard Lengths	3000 mm, 6000 mm or Cut-to-Length
Electrical Conductivity	75 – 85 % IACS (condition dependent)
Thermal Conductivity	320 – 340 W/m·K
Density	8.9 g/cm³
Melting Range	1070 – 1080 °C
Tensile Strength (Aged)	450 – 550 MPa
Yield Strength (Aged)	350 – 450 MPa
Elongation	10 – 20 %
Hardness	120 – 180 HB (condition dependent)
Softening Resistance	Excellent – retains strength at elevated temperatures
Surface Finish	Mill Finish, Pickled, Bright Drawn, Machined Finish
Dimensional Tolerances	As per EN / ASTM standards or customer specification
Weldability	Excellent (specifically designed for resistance welding)
Machinability	Good (better than pure copper)
Typical Standards	ASTM B224, ASTM B465, EN 12163, EN 12164, EN 12165
Quality Documentation	Mill Test Certificate (EN 10204 3.1), Chemical & Mechanical Reports

Chemical Composition

Element	Chemical Composition (% by Weight)	Function / Role in Alloy
Copper (Cu)	Balance (≥ 99.0)	Base metal providing excellent electrical and thermal conductivity
Chromium (Cr)	0.50 – 1.20	Increases strength, wear resistance, and high-temperature softening resistance
Zirconium (Zr)	0.03 – 0.30	Improves grain refinement, creep resistance, and thermal stability
Iron (Fe)	≤ 0.10	Residual element; controlled to maintain conductivity
Silicon (Si)	≤ 0.10	Residual; kept low to preserve mechanical and electrical properties
Nickel (Ni)	≤ 0.10	Trace impurity; may slightly enhance strength
Oxygen (O)	≤ 0.02	Controlled to avoid embrittlement and conductivity loss
Other Elements (Total)	≤ 0.20	Combined trace impurities as per ASTM / EN limits

UNS Codes & Grades

UNS Code	Common Grade / Designation	Equivalent EN / DIN	Typical Product Forms	Key Characteristics
C18150	CuCrZr (Chromium Zirconium Copper)	EN CW106C / DIN 2.1293	Sheets, Plates, Rods, Bars	High strength copper alloy with excellent electrical & thermal conductivity and superior softening resistance at elevated temperatures
C18200	CuCr (Chromium Copper)	EN CW105C	Rods, Bars, Plates	High conductivity with good mechanical strength; lower thermal stability than CuCrZr
C18000	CuCr (Low Chromium Copper)	EN CW104C	Sheets, Strips, Bars	Good electrical conductivity with moderate strength; used where formability is required
C18300	CuCrZr (High Performance Variant)	EN CW107C	Forged Bars, Heavy Plates	Enhanced creep resistance and fatigue strength for demanding electrical and welding applications
—	CuCrZr (Heat-Treated)	EN CW106C-HT	Sheets, Rods, Electrodes	Solution treated and aged condition for maximum strength–conductivity balance

Mechanical, Physical & Fabrication Properties

Property Category	Property	Typical Values (CuCrZr – C18150)	Remarks / Engineering Significance
Mechanical Properties	Tensile Strength	450 – 600 MPa (aged condition)	High strength maintained even at elevated temperatures
	Yield Strength (0.2%)	350 – 500 MPa	Excellent load-bearing capability
	Elongation	8 – 15 %	Good balance of ductility and strength
	Hardness	120 – 180 HB	Depends on heat-treatment condition
	Fatigue Strength	High	Suitable for cyclic electrical and mechanical loads
	Creep Resistance	Excellent	Performs reliably under sustained stress at high temperature
Physical Properties	Density	8.9 g/cm³	Comparable to pure copper
	Electrical Conductivity	75 – 85 % IACS	Significantly higher than most high-strength copper alloys
	Thermal Conductivity	320 – 340 W/m·K	Ideal for heat dissipation applications
	Coefficient of Thermal Expansion	17 × 10⁻⁶ /K	Stable dimensional behavior under thermal cycling
	Softening Temperature	> 500 °C	Much higher than ETP or OFHC copper
	Magnetic Properties	Non-magnetic	Suitable for electrical and electronic systems
Fabrication Properties	Machinability	Good	Better than pure copper; carbide tools recommended
	Formability	Moderate	Best in solution-annealed condition
	Weldability	Excellent (Resistance & TIG)	Widely used for resistance welding electrodes
	Brazability	Good	Standard copper-based brazing alloys applicable
	Heat Treatment	Solution Treated + Aged	Precipitation hardening improves strength
	Forgeability	Good	Suitable for hot-forged bars and components
	Surface Finish	Excellent	Supports precision machining and plating

Common Names & International Identifiers

Category	Identifier / Name	Standard / System	Remarks / Usage Context
Common Names	Chromium Zirconium Copper	Industry / Trade Name	Most widely used commercial name
	CuCrZr	Metallurgical Abbreviation	Indicates Cu–Cr–Zr alloy composition
	CuCr1Zr	EN Designation	European standard naming convention
	High Strength Copper Alloy	Generic Industry Term	Used in welding, electrical & thermal applications
	Welding Grade Copper	Application-Based Name	Refers to resistance welding electrode usage
	Electrode Copper Alloy	Industrial Term	Used for spot welding caps & holders
	Heat-Resistant Copper	Functional Name	Highlights high softening temperature
	Conductive Structural Copper	Engineering Term	Emphasizes conductivity + strength balance
International Identifiers	C18150	UNS (Unified Numbering System)	Most common UNS code globally
	2.1293	DIN / EN Material Number	European material designation
	CuCr1Zr	EN 1412 / EN 12163 / EN 12164	Bars, rods, plates & profiles
	CZ100	BS (British Standard)	Used in UK & Commonwealth markets
	ASTM B224 / B465	ASTM	Plates, sheets, bars & forgings
	ISO CuCrZr	ISO	International reference designation
	GB/T CuCrZr	Chinese Standard	Used in EV, welding & electronics sectors
	JIS CuCrZr	Japanese Standard	High-precision industrial applications

Standards & International Equivalents

Country / Region	Standard Organization	Standard Number	Grade / Designation	Applicable Product Forms	Remarks
International	ISO	ISO 1634 / ISO 431	CuCrZr	Sheets, Plates, Rods, Bars	General international reference standard
USA	ASTM	ASTM B224 / ASTM B465	C18150	Plates, Sheets, Bars, Forgings	High-strength, high-conductivity copper alloy
USA	UNS	Unified Numbering System	C18150	All Product Forms	Globally accepted material identification
Europe	EN	EN 1412	CuCr1Zr	Plates, Sheets	Wrought copper and copper alloys
Europe	EN	EN 12163	CuCr1Zr	Rods, Bars, Profiles	Hot-rolled and extruded products
Europe	EN	EN 12164	CuCr1Zr	Rods for Machining	Free-machining and precision rods
Germany	DIN	DIN EN 12163 / 12164 / 1412	2.1293	Sheets, Plates, Rods, Bars	German material number system
United Kingdom	BS	BS EN 12163 / 12164	CZ100	Rods, Bars	UK equivalent designation
Japan	JIS	JIS H 3250 / JIS H 3300	CuCrZr	Bars, Rods, Plates	High-performance industrial applications
China	GB / T	GB/T 1290 / GB/T 2059	CuCrZr	Sheets, Plates, Rods, Bars	Widely used in EV & welding industries
Russia	GOST	GOST 18175	BrKh1Ts	Rods, Bars, Plates	Russian equivalent copper alloy
India	BIS (IS)	IS 613 / IS 14811	CuCrZr	Sheets, Plates, Rods, Bars	Indian standard for copper alloys

Applications

Industry / Sector	Application Area	Product Form Used	Why CuCrZr is Preferred	Typical End-Use Examples
Resistance Welding	Welding Electrodes & Tips	Rods, Bars	High electrical conductivity combined with excellent softening resistance	Spot welding tips, seam welding wheels, projection welding electrodes
Automotive	EV & Battery Manufacturing	Sheets, Plates, Bars	Maintains strength at elevated temperatures with high current flow	Battery tab welders, busbar welding tooling, EV motor components
Electrical Engineering	High-Current Conductors	Bars, Plates	Superior conductivity with improved mechanical strength vs pure copper	Busbars, switchgear contacts, current carrying plates
Power Generation	Thermal & Nuclear Equipment	Plates, Bars	Excellent thermal stability and resistance to thermal fatigue	Heat sinks, current collectors, power plant components
Railway & Transport	Traction & Electrical Systems	Bars, Sheets	High wear resistance with consistent electrical performance	Traction motor parts, contact strips, electrical connectors
Aerospace	High-Temperature Electrical Parts	Rods, Plates	Retains mechanical properties under cyclic thermal loads	Electrical connectors, heat dissipation components
Industrial Machinery	Hot-Working Tooling	Rods, Bars	High hardness after aging with excellent fatigue resistance	Hot stamping tools, forming dies, extrusion tooling
Plastic Processing	Moulds & Inserts	Plates, Bars	Fast heat dissipation reduces cycle time	Injection mould inserts, blow mould tooling
Electronics	Heat Management Components	Sheets, Plates	High thermal conductivity with structural integrity	Heat spreaders, cooling plates, power electronics bases
Defense & Heavy Engineering	High-Load Electrical Parts	Bars, Plates	High strength-to-conductivity ratio and long service life	Military-grade connectors, high-current terminals

Common Chromium Zirconium Copper (CuCrZr) Forms & Dimensions Chart

Product Form	Standard Size Range	Standard Length / Sheet Size	Supply Type	Notes
Sheets	Thickness: 0.5 – 6 mm Width: 100 – 1250 mm	Length: 500 – 3000 mm	Full sheet / slit / cut-to-size	Preferred for fabrication, current plates, EDM backing
Plates	Thickness: 6 – 150 mm Width: 50 – 1000 mm	Length: 100 – 3000 mm	Plate / saw-cut blocks	Tooling blocks, heat sinks, high-load contact plates
Round Rods	Diameter: Ø 6 – 200 mm	Standard lengths: 1 m / 2 m / 3 m	Extruded / drawn / peeled	Electrodes, shafts, pins; tight tolerance available on request
Flat Bars	Thickness: 3 – 100 mm Width: 10 – 300 mm	Standard lengths: 1 m / 2 m / 3 m	Rolled / machined	High-strength conductor flats, tooling components
Square Bars	Size (A/F): 10 × 10 – 100 × 100 mm	Standard lengths: 1 m / 2 m / 3 m	Extruded / machined	Jigs, blocks, electrode holders
Custom Profiles	As per drawing / CAD	As per requirement	Machined / extrusion-based	Cooling channels, shaped electrodes, special contact blocks

Form	Thickness (mm)	Weight (kg/m²) (Approx.)	Quick Formula
Sheet / Plate	1	8.90	kg/m² ≈ 8.90 × Thickness(mm)
	2	17.80
	3	26.70
	5	44.50
	10	89.00
	20	178.00

Diameter (mm)	Weight (kg/m) (Approx.)	Diameter (mm)	Weight (kg/m) (Approx.)
10	0.70	50	17.47
12	1.01	60	25.16
16	1.79	75	39.33
20	2.80	100	69.98
25	4.37	150	157.46
30	6.30	200	279.93

Bar Type	Size Example (mm)	Weight (kg/m) (Approx.)	Quick Formula
Flat Bar	20 × 5	0.89	kg/m ≈ (Width × Thickness × 0.00890)
Flat Bar	40 × 10	3.56
Flat Bar	50 × 10	4.45
Flat Bar	100 × 10	8.90
Square Bar	10 × 10	0.89	kg/m ≈ (A/F × A/F × 0.00890)
Square Bar	25 × 25	5.56
Square Bar	50 × 50	22.25

Note: Theoretical weights are calculated using an approximate density of 8.90 g/cm³ (CuCrZr / Copper alloy family). Actual weight may vary with tolerances, temper, surface finish, and machining allowance.

Chromium Zirconium Copper (CuCrZr)