C18150 Chromium Zirconium Copper Sheet
Grade Equivalents: UNS C18200 / CuCr / DIN 2.1291 / EN CW105C / RWMA Class 2
Application Focus: Resistance Welding Electrode Holders, Spot Welding Platens, Seam Welder Backups, & Dies
Executive Standards: RWMA Class 2 / AWS J1.3, ASTM B152, ISO 5182
Size Range: Thickness 10 mm – 150 mm, Custom Width and Length Sawn / Precision Ground
Temper Condition: Solution Heat-Treated & Age-Hardened (TF00 / HT) for Optimal Performance
Core Purpose: High Electrical Conductivity and Thermal Dissipation for Standard Resistance Welding
Quality Assurance: ISO 9001:2015, RoHS Compliant, EN 10204 3.1 Mill Test Certificate
Description
C18150 Chromium Zirconium Copper Sheet for Resistance Welding & High-Conductivity Applications — Precision-Engineered for Maximum Service Life
The C18150 Chromium Zirconium Copper Sheet is a precipitation hardened Cu-Cr-Zr alloy which is appropriate for high stress electrical and thermal use. It has 75-85% IACS electrical conductivity, tensile strength above 450 MPa and softening temperature over 500℃, suitable for a variety of heavy-duty industrial welding applications. Founded in 1997, Dongguan Jiaye Dingsheng Precision Casting & Forging Co., Ltd. employs vacuum melting, precision rolling and fixed ageing method in manufacturing. All completed sheets have stable composition and exact dimensional tolerance, comprehensive ISO 9001 quality papers are given for each batch.
What Is C18150 Chromium Zirconium Copper Sheet?
C18150 Chromium Zirconium Copper Sheet is a Cu-Cr-Zr series alloy comprising 0.5-1.5% chromium and 0.05-0.25% zirconium and is classified as RWMA Class 2 material. Ageing treatment creates fine precipitates in the copper matrix to optimise the material performance.
Chromium precipitate enhances mechanical deformation resistance to stabilise electrode structure during high-cycle welding. Zirconium optimises internal grain structure and resists high-temperature softening, fixing the flaw of common C11000 copper that is easy to fail beyond 200°C. The material balances strong current conduction, quick heat dissipation and structural stability, which common copper materials cannot do.
Technical Specifications
| Property | Value |
|---|---|
| Alloy Grade | C18150 (Cu-Cr-Zr) |
| Chromium Content | 0.5 – 1.5% |
| Zirconium Content | 0.05 – 0.25% |
| Density | 8.89 g/cm³ |
| Melting Point | ~1070°C |
| Electrical Conductivity | 75 – 85% IACS |
| Thermal Conductivity | 320 – 350 W/(m·K) |
| Tensile Strength | ≥450 MPa (aged) |
| Yield Strength | 300 – 450 MPa |
| Rockwell Hardness | 75 – 83 HRB |
| Softening Temperature | Up to 500°C |
| Temper Condition | Solution Treated & Aged (TF00/HT) |
| Executive Standards | RWMA Class 2, ASTM B929, SAE J461 |
| Compliance | ISO 9001, RoHS, REACH |
| Documentation | EN 10204 3.1 Mill Test Certificate |
| Thickness Range | 10 mm – 150 mm |
| Width & Length | Custom sawn / precision ground |
Key Performance Advantages
The alloy has steady conductivity under load, which reduces power loss in welding and stabilises the welding effects. It has a thermal conductivity of 320–350 W/(m·K), which rapidly removes welding interface heat, preventing electrode overheating and reducing replacement frequency. This copper with optimised grain structure can sustain constant hardness in long-term high temperature cycles, whereas regular copper cannot.
Zirconium element reduces the possibility of electrode sticking in welding of galvanised steel which is suitable for the standard automobile welding production. The yield strength of 300-450 MPa guaranties that the structural deformation does not occur under the long-term clamping pressure, which is necessary for projection welding dies and seam welding accessories.
Primary Application Areas
C18150 Chromium Zirconium Copper Sheet is extensively used in resistance welding equipment for electrode plate, welding die and connecting arm, reducing the later maintenance frequency. Application Used as mould liners for steel and non-ferrous metal continuous casting, preventing the thermal fatigue cracking caused by repetitive heating and cooling. It is also suitable for high voltage switch gears and power electronic heat dissipation parts, which ensures the stability of the structure under high current density.
Quality Control Process
We do the whole process examination of all items. OES spectrum analysis confirms the composition of the alloying elements, hardness and tensile test verify the mechanical characteristics, eddy current test measures the conductivity, microstructure inspection and ultrasonic test eradicate internal faults. Full EN 10204 3.1 certifications are provided for each shipment for complete batch traceability.
Certificate
Custom Manufacturing & Supply Options
We support custom size, hardness and conductivity adjustment according to user demands, and provide CNC finished processing services. In-stock products are delivered within 3–5 days, and custom order quotations will be replied within 24 hours. We provide complete logistics and customs document support for global customers.
Frequently Asked Questions
Q1: What is the difference between C18150 and C18200?
A1: C18150 contains zirconium, which improves high-temperature softening resistance and anti-sticking performance, more suitable for automotive galvanized steel welding than C18200.
Q2: Can the sheet be processed into special-shaped parts?
A2: Yes, it has good machinability. Carbide tools can be used for precision processing of complex electrode structures.
Q3: Is secondary heat treatment required after purchase?
A3: No, products are supplied with complete solution and aging treatment, meeting RWMA Class 2 standards for direct use.
Q4: What is the standard hardness of finished sheets?
A4: The minimum hardness is 75 HRB, meeting industrial welding load-bearing and anti-deformation usage requirements.
Q5: What documents are provided for each order?
A5: Each batch is attached with EN 10204 3.1 test reports and relevant compliance documents with complete test data.
Contact Us
If you have size customization and procurement demands for C18150 Chromium Zirconium Copper Sheet, please send your detailed technical specifications tojs01@jstongcai.com.cn. Our team will provide a complete and professional quotation within 24 hours.
