Raytron Technical Review RESEARCH ARTICLE WP-03-03

CCS-40% IACS: Higher Conductivity Applications

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-03-03

Abstract

CCS-40% provides higher conductivity while maintaining the steel core strength advantage. This white paper examines applications requiring this balance, including specialty cables, connectors, and situations where both conductivity and strength are critical.

Key Findings

Conductivity 40% IACS Higher conductivity for demanding applications
Tensile Strength 400-600 MPa Maintains steel core strength advantage
Copper Volume 38-42% Increased copper content for better conductivity
Application Range Specialty Ideal for connectors, specialty cables, high-current uses

Keywords

CCS-40%;high-conductivity CCS;specialty applications;strength and conductivity

1. Introduction

1.1 Grade Positioning

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Figure Fig. 1 Performance Balance Radar Chart

2. Material Specifications

3. Performance Comparison

4. Application Analysis

5. Conclusion

CCS-40% provides an excellent solution for applications requiring higher conductivity and strength.

Frequently Asked Questions

When should I choose CCS-40% over CCS-30%?

Choose CCS-40% when higher conductivity is critical, such as in power connectors, high-current applications, or when lower resistance is required. CCS-40% provides better current-carrying capacity while still maintaining the strength advantages of the steel core.

What applications benefit most from CCS-40%?

CCS-40% is ideal for electrical connectors requiring both strength and conductivity, spring contacts, specialty cables with higher current requirements, and applications where the balance between conductivity and mechanical properties is critical.

How does CCS-40% compare to copper alloys?

CCS-40% offers similar or better strength than many copper alloys at lower cost. It provides 40% IACS conductivity with 400-600 MPa tensile strength, making it competitive with bronze and brass alloys while offering better cost-performance ratio.

Does higher copper content affect the strength?

Yes, CCS-40% has slightly lower tensile strength (400-600 MPa) compared to CCS-30% (500-700 MPa) due to higher copper content. However, it still significantly exceeds solid copper (~200 MPa) and provides adequate strength for most applications.

Figures

PropertyBalanceRadar Diagram

Fig. 1 Performance Balance Radar Chart

Tables

Table 1 Grade Positioning

Grade	Conductivity	Cu Volume Ratio	Application
CCS-21%	20-23%	20-25%	Grounding
CCS-30%	28-32%	28-32%	Coaxial
CCS-40%	38-42%	38-42%	High Conductive

Table 2 Material Specifications

Component	Specification
Core Material	LowCarbonSteel
Cladding Layer	Copper(≥99.9%)
Copper Volume Ratio	38-42%

Table 3 Performance Parameters

Property	Value
Conductivity	38-42% IACS
Tensile Strength	400-600 MPa
Density	~8.1 g/cm³

Table 4 Application Scenarios

Application	Reason for CCS-40%
Special Cable	RequiredMoreHighConductivity
ConnectionDevice	Strength+ Conductive
HighCurrentApplications	Current-Carrying Capacity

References

ASTM International ASTM B452: Copper-Clad Steel 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