CuCr1Zr Plate for Resistance Welding & Continuous Casting — High Conductivity Chromium Zirconium Copper Solution

CuCr1Zr Plate (C18150) with electrical conductivity more than 80% IACS, tensile strength greater than 450 MPa, and hardness between 130 and 160 HB is supplied by Dongguan Jiaye Dingsheng Precision Casting & Forging Co., Ltd. Our firm was established in 1997 and has produced chromium zirconium copper professionally for more than 25 years.

By using vacuum melting and precision rolling techniques, we guaranty the final products' perfect dimensional tolerance and robust grain structure. The material is generally suitable to resistance welding, continuous casting moulds, and high-voltage switchgear situations. It can function steadily at temperatures as high as 500°C, which is much higher than the softening temperature of regular copper.

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What Is CuCr1Zr Plate?

CuCr1Zr Plate is an ISO 5182 and C18150 precipitation hardened copper alloy with chromium and zirconium. it is designed for applications where conventional pure copper cannot meet the operational requirements because of repeated heat cycling, constant mechanical stress and demanding electrical conduction requirements.
C11000 ETP copper softens at 200°C although the alloy remains fully structurally stable at 500°C. Chromium precipitates hardening phases in the material . Zirconium increases grain structure and resists creep deformation during prolonged strain . The combination of both elements improves the overall stability of the plate under high temperatures and loads.

Chemical Composition & Technical Specifications

Parameter	Value
Alloy Standard	C18150 / ISO 5182
Chromium (Cr)	0.5% – 1.2%
Zirconium (Zr)	0.03% – 0.3%
Copper (Cu)	Balance
Hardness	130 – 160 HB
Tensile Strength	≥ 450 MPa
Electrical Conductivity	> 80% IACS
Thermal Conductivity	~320 W/(m·K)
Max Operating Temperature	~500°C
RWMA Classification	Class 2
Thickness Range	Custom (per order)
Available Forms	Plate, Bar, Strip, Coil

Key Performance Advantages

Most high-strength copper alloys sacrifice conductivity for hardness. CuCr1Zr Plate has an excellent conductivity and stable mechanical strength in balanced performance. It stabilises the effectiveness of mould cooling and increases the service life of the welding electrodes with the conductivity of more than 80% IACS and hardness of 130–160 HB.Solution heat treatment and ageing treatment may effectively anchor the chromium precipitation phase in the alloy, and so prevent the softening of the material due to the repeated thermal cycling. The resistance to creep and deformation of zirconium is superior than standard CuCr (C18200) alloy, due to grain boundary refinement and the inhibition of grain development at high temperature. The alloy is compatible with carbide tool processing, allowing for in-house precision part finishing with little tool loss.

Quality Control Process

All product batches adhere to the ASTM B441 standard for a five-stage comprehensive inspection, which includes metallographic grain inspection, eddy current conductivity testing, hardness testing, OES chemical composition analysis, and ultrasonic NDT fault identification. To provide total material traceability from raw materials to completed products, a complete Mill Test Certificate (MTC) is attached to every shipment.

Application Scenarios

It is used extensively in EDM electrodes, continuous casting mould liners, high voltage switchgears connections and resistance welding electrodes. It guarantees stable conduction and structural performance during frequent switching operation and EDM processing; it accelerates heat dissipation of casting moulds to prevent thermal fatigue cracking; it maintains the stability of electrode geometry during long-term high pressure and high frequency welding activity.

Customization & Supply Options

We provide customized size processing for plates, with adjustable thickness, width, length and temper states including solution-treated, aged and as-rolled. Our in-house CNC workshop can process finished parts such as electrode caps and mold inserts. Conventional stocks are delivered within 3–5 days, and formal quotations can be provided within 24 hours. We support global logistics including sea and air freight, with complete customs documents for European, American and Southeast Asian customers.

Certificate

Certificates

Frequently Asked Questions

Q1: What is the CuCr1Zr Plate's maximum operating temperature?
A1: Unlike regular C11000 copper, which softens at 200°C, it maintains stable mechanical qualities up to 500°C.

Q2: What distinguishes CuCr (C18200) from CuCr1Zr?
A2: Unavailable in C18200 alloy, the additional zirconium in CuCr1Zr enhances high-temperature creep resistance and optimises grain boundaries.

Q3: Can the plate be processed with conventional equipment?
A3: Yes, carbide tools are recommended for processing to avoid tool wear caused by the alloy's hardness.

Q4: What causes reduced conductivity of individual plates?
A4: Unqualified heat treatment or over-aging during production will affect conductivity. All our products pass batch eddy current testing to avoid this problem.

Q5: Is it suitable for EDM electrode production?
A5: Yes, its stable high-temperature performance lowers electrode wear and guarantees EDM machining accuracy.

Contact Us

Send your detailed size specifications and procurement quantity demands tojs01@jstongcai.com.cn, and we will provide you with an accurate and detailed quotation within 24 hours. We support customized production and bulk supply of CuCr1Zr Plate to meet different industrial processing and application needs.