Raytron Technical Review RESEARCH ARTICLE WP-06-00

CCAA: Enhanced Mechanical Properties

RAYTRON Technical Team¹

¹RAYTRON Group, China

Published: March 2026 Version: 1.0

DOI: 10.1234/raytron.2026.WP-01-20

Abstract

Copper-clad aluminum alloy (CCAA) represents the evolution of CCA technology, using high-strength aluminum alloys as core material. This whitepaper examines the advantages of alloy cores, including improved tensile strength, fatigue resistance, and high-temperature performance, providing material selection guidance and processing considerations for CCAA conductors.

Key Findings

Significant Tensile Strength Improvement CCAA-6201 achieves 88% higher tensile strength than standard CCA-1350, reaching 320-380 MPa for high-strength applications.
Excellent Fatigue Resistance CCAA-6101 achieves 90 MPa fatigue limit, CCAA-6201 reaches 110 MPa, significantly improved from CCA-1350's 55 MPa.
Superior High-Temperature Performance Alloy core provides better creep resistance, maintaining stability at elevated temperatures for applications like transformers.
Application-Oriented Material Selection 6101 alloy suits automotive vibration environments, 6201 alloy meets aerospace high-strength requirements, providing targeted solutions.

Keywords

CCAA;copper clad aluminum alloy;high strength CCA;6101;6201;enhanced properties

1. Introduction

Standard CCA uses pure aluminum (1350) as core material, limiting mechanical properties. CCAA uses heat-treatable aluminum alloys to enhance performance.

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Figure Fig. 1 Alloy Core Performance Comparison

2. Aluminum Alloy Core Selection

3. Performance Enhancements

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Figure Fig. 2 Fatigue Performance S-N Curves

4. Manufacturing Considerations

5. Application Advantages

6. Design Guidelines

7. Conclusion

CCAA outperforms standard CCA in applications requiring high strength, fatigue resistance, and high-temperature performance.

8. References

ASM Handbook Volume 2. (2020). Aluminum Alloys.

Frequently Asked Questions

What is the main difference between CCAA and standard CCA?

CCAA uses heat-treatable aluminum alloys (such as 6101, 6201) as core material, while standard CCA uses pure aluminum (1350). Alloy cores provide higher strength, better fatigue resistance and creep performance, with slightly reduced conductivity.

How much does CCAA cost compared to CCA?

CCAA material costs 10-30% more than standard CCA, depending on alloy type. CCAA-5005 adds about 10-15%, CCAA-5052 adds 15-25%, CCAA-6061 adds 20-30%. However, considering longer service life and reliability, overall cost-effectiveness is better.

What applications are suitable for CCAA?

CCAA is particularly suitable for high-vibration environments (automotive engine bay wiring), high-temperature applications (transformer windings), aerospace (high-strength lightweight requirements), and industrial machinery (robot wiring). Any application requiring higher mechanical properties than standard CCA can consider CCAA.

How is CCAA's conductivity?

CCAA conductivity depends on alloy core type and copper cladding ratio. CCAA-5052 achieves about 50-55% IACS, CCAA-6061 about 52-58% IACS, slightly lower than standard CCA's 62-68% IACS, but still within acceptable range.

Figures

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Fig. 1 Alloy Core Performance Comparison

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Fig. 2 Fatigue Performance S-N Curves

Tables

Table 1 Alloy Systems

Alloy	Composition	Key Property
6101	Al-Mg-Si	Good conductivity + strength
6201	Al-Mg-Si	Higher strength
5052	Al-Mg	Good corrosion resistance

Table 2 Tensile Strength Comparison

Material	UTS (MPa)	vs CCA Improvement
CCA-1350	170-200	Baseline
CCAA-6101	250-300	+47%
CCAA-6201	320-380	+88%

Table 3 Fatigue Performance

Material	Fatigue Limit (MPa)
CCA-1350	55
CCAA-6101	90
CCAA-6201	110

Table 4 Application Guide

Application	Recommended Alloy	Reason
Automotive	CCAA-6101	Vibration fatigue
Aerospace	CCAA-6201	Strength + weight
Transformer	CCAA-6101	Temperature performance

References

ASM International Aluminum Alloys Handbook ASM (2020)

Authoritative References

ASTM International IEC (International Electrotechnical Commission) ISO (International Organization for Standardization) SAE International IEEE

Gaolei Xu

Senior Materials Scientist

Credentials & Honors

• CTO, Raytron Group
• Zhejiang Provincial High-level Talent Special Support Program - Young Talent
• Shaoxing "Technology Vice President"
• Shaoxing Science and Technology Commissioner
• Member of National Technical Committee 243 on Heavy Metals (SAC/TC 243/SC2)

National Standards (Lead Author) View Official

GB/T 27671-2011 - Copper Profiles for Electrical Conductors
YS/T 1043-2015 - Silver-bearing Oxygen-free Copper Strip for Motor Commutators
YS/T 974-2014 - Copper and Copper Alloy Strip for Composite Contact Materials
YS/T 1082-2015 - Copper Strip for Lamp Lead Stents

Patents (Inventor) Search Patents

CN104959396A - Production Process of Copper Strip for Composite Contact Materials
CN106077125A - Production Process of Copper Profile for Magnetic Pole Coils
CN201410710206 - Conductive Material for High-speed Railway Traction Motors and Production Method
CN201310719717 - Method for Controlling Strip Shape of Copper Strip Blank by Continuous Extrusion
CN201310720126 - Device for Controlling Strip Shape of Copper Strip Blank by Continuous Extrusion
CN201310376884 - Five-in-one Copper Strip Edge Treatment Equipment for Transformers
CN201420184755 - Continuous Extrusion Die Flow Promotion Device
CN201320761640 - Continuous Extrusion Waste Cleaning Device

Areas of Expertise

Copper-Clad Aluminum (CCA) Technology Copper-Clad Steel (CCS) Manufacturing Bimetallic Composite Materials PV Ribbon for Solar Cells Battery Tab Materials for EV Applications Continuous Extrusion Technology

Selected Publications

• Research and Application of Rolling Method for Manufacturing Metal Laminated Composites, Aluminum Processing Journal, 2008
• Annealing Process Research of Copper-Aluminum Composite Strip
• Research on Preparation Process of Copper/Aluminum Composite Strip for Cables
• Interface Microstructure Evolution of Rolled Copper/Aluminum Composite Strip During Annealing

Mr. Xu Gaolei is a distinguished expert in non-ferrous metal processing with over 15 years of experience. He is recognized as a Young Talent under the Zhejiang Provincial High-level Talent Special Support Program. He leads R&D initiatives in bimetallic composite technologies and has contributed significantly to the standardization of copper and bimetallic materials in China.

Click standard/patent codes to view official documents