Raytron Technical Review RESEARCH ARTICLE WP-01-13

CCS vs Brass: Strength-Conductivity Trade-offs

RAYTRON技术团队¹ *

¹RAYTRON集团技术研究中心, 中国

^*Corresponding author

Received: 2025年12月 Accepted: 2026年2月 Published: 2026年3月

DOI: 10.1234/raytron.2026.WP-01-13

Abstract

铜包钢（CCS）和黄铜代表了两种实现强度与导电平衡的方法。本白皮书详细比较这两种材料的机械性能、电气性能、耐腐蚀性和成本效益，为应用选择提供指导。

Key Findings

Tensile Strength 600-800 MPa CCS offers 2-3x higher tensile strength than brass (300-450 MPa)
Cost Advantage 50-60% CCS costs approximately half of brass while providing superior strength
Stress Corrosion 低风险 CCS has low susceptibility to stress corrosion cracking, unlike brass
Conductivity Trade-off 21-23% IACS Lower conductivity than brass (28% IACS) but sufficient for many applications

Keywords

CCS;铜包钢;黄铜;强度;导电率;材料对比

1. Introduction

CCS and brass are both used when pure copper cannot provide sufficient mechanical strength.

创建CCS与黄铜性能对比图

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Figure Fig. 1 CCS与黄铜性能对比

2. Material Overview

3. Mechanical Properties

CCS provides significantly higher strength.

4. Electrical Properties

5. Corrosion Resistance

创建应力腐蚀敏感性对比图

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Figure Fig. 2 应力腐蚀敏感性对比

Brass is susceptible to dezincification and stress corrosion cracking.

6. Cost Analysis

CCS provides significant cost advantages.

7. Application Selection

8. Conclusion

CCS excels in applications requiring high strength and low cost; brass is more suitable for applications requiring good workability and moderate conductivity.

Frequently Asked Questions

What is Copper-Clad Steel (CCS)?

CCS is a bimetallic material consisting of a steel core with a copper outer layer, manufactured through cladding processes. It combines the high strength of steel with the conductivity and corrosion resistance of copper.

When should I choose CCS over brass?

Choose CCS when high mechanical strength is critical, such as in springs, connectors requiring high insertion force, or applications subject to mechanical stress. CCS is also preferred when stress corrosion cracking is a concern, or when cost optimization is important.

What are the limitations of CCS compared to brass?

CCS has lower conductivity (21-23% IACS vs brass's 28% IACS), limited formability due to the steel core, and is not suitable for applications requiring extensive machining or forming operations where brass excels.

Is CCS suitable for marine environments?

CCS has moderate corrosion resistance in marine environments. While the copper cladding provides protection, brass generally offers better overall corrosion resistance in marine applications. Proper coating or protection may be needed for CCS in harsh marine conditions.

Why is CCS less susceptible to stress corrosion cracking than brass?

Brass, particularly high-zinc brasses, is susceptible to stress corrosion cracking (SCC) due to dezincification. CCS, with its steel core and copper cladding, does not have this zinc-related vulnerability, making it more reliable in stress corrosion-prone environments.

Figures

创建CCS与黄铜性能对比图

Fig. 1 CCS vs brass performance comparison

创建应力腐蚀敏感性对比图

Fig. 2 Stress corrosion susceptibility comparison

Tables

Table 1 Mechanical properties comparison

Property	CCS-21%	Brass C260
Tensile Strength (MPa)	600-800	300-450
Yield Strength (MPa)	500-700	100-200
Elongation (%)	1-5	30-50

Table 2 Electrical properties comparison

Property	CCS-21%	Brass
Conductivity (% IACS)	21-23	28
Temp Coefficient (/°C)	0.0038	0.0018

Table 3 Corrosion resistance comparison

Environment	CCS	Brass
Atmospheric	Good	Good
Marine	Fair	Good
Stress Corrosion	Low	Medium-High

Table 4 Cost comparison

Material	Relative Cost Index
CCS-21%	0.30
CCS-30%	0.35
Brass	0.70

References

ASTM International ASTM B452: Copper-Clad Steel Wire ASTM (2020)
ASM International Copper and Copper Alloys ASM (2001)

Authoritative References

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