Raytron Technical Review RESEARCH ARTICLE cca-90-near-copper

CCA-90% IACS: Near-Copper Performance

Gao-Lei Xu¹ *

¹RAYTRON Group Technology Research Center, China

^*Corresponding author

Received: 2025-12 Accepted: 2026-02 Published: 03/2026

DOI: 10.1234/raytron.2026.WP-02-04

Abstract

CCA-90% represents the highest conductivity grade of commercially available copper-clad aluminum, providing 90%+ IACS conductivity approaching pure copper performance. This white paper examines the performance, manufacturing challenges, and niche applications for this specialty grade.

Key Findings

Conductivity 92% IACS Near-copper performance for critical applications
Weight Reduction 35% Significant weight savings vs copper
Copper Volume 40-45% Highest copper content among CCA grades
Ampacity ~95% Cu Nearly equivalent to copper capacity

Keywords

CCA-90%;ultra-high conductivity;near-copper;specialty grade;weight optimization

1. Introduction

CCA-90% is a specialty product for applications requiring near-copper performance.

CCA-90%Cross-Section

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Figure Fig. 1 CCA-90% Cross-Section Structure

2. Material Specifications

Copper volume ratio 40-45%, providing 90%+ IACS conductivity.

3. Performance Analysis

3.1 Near-Copper Performance

Diagram placeholder

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Figure Fig. 2 Performance Proximity Analysis

For most applications, CCA-90% is functionally equivalent to copper.

4. Manufacturing Challenges

High copper volume ratio introduces process complexity, requiring specialized equipment.

5. Application Niches

6. Conclusion

CCA-90% provides a unique solution for weight-critical applications requiring near-copper performance.

Frequently Asked Questions

How does CCA-90% differ from pure copper?

CCA-90% achieves 92% of copper's conductivity with 35% weight reduction. For most applications, it performs functionally equivalent to copper while offering significant weight advantages.

What are the manufacturing challenges for CCA-90%?

The high copper volume ratio (40-45%) requires specialized manufacturing equipment and processes. The thicker copper cladding demands precise control during the Clad & Weld process to ensure uniform metallurgical bonding.

What niche applications use CCA-90%?

CCA-90% is used in aerospace wiring where weight is critical but copper-level performance is required, high-end audio equipment, specialty cables, and weight-sensitive systems requiring near-copper conductivity.

Is CCA-90% cost-effective?

CCA-90% costs approximately 80% of copper while providing 92% conductivity and 35% weight reduction. It's most cost-effective for applications where weight savings justify the premium over lower CCA grades.

Figures

Create CCA-90%Cross-Section StructureDiagram

Fig. 1 CCA-90% Cross-Section Structure

PropertyNearDegree Analysis Diagram

Fig. 2 Performance Proximity Analysis

Tables

Table 1 Specialty Grade Positioning

Grade	Conductivity	Cu Volume Ratio	Category
CCA-62%	62-65%	12-14%	standards
CCA-80%	80-83%	25-30%	ExcellentQuality
CCA-90%	90-93%	40-45%	Special

Table 2 Near-Copper Performance

Property	CCA-90%	Copper	Ratio
Conductivity	92% IACS	100% IACS	0.92
Density	5.8 g/cm³	8.96 g/cm³	0.65
Current-Carrying Capacity	~95% Cu	100%	0.95

Table 3 Application Niches

Application	Reason for CCA-90%
AerospaceWiring	WeightKey ，RequiredCopperProperty
HighAudio	ExcellentQualityProperty，WeightAdvantage
Special Cable	RequiredNearCopperProperty
WeightSensitiveSystem	35%Weight Reduction

Table 4 Economic Analysis

Material	Cost Index	Conductivity	Weight
Copper	1.00	100%	100%
CCA-80%	0.65	82%	50%
CCA-90%	0.80	92%	65%

References

ASTM International ASTM B566: Copper-Clad Aluminum Wire ASTM (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