Understanding Copper Coated Steel Wire Specifications for Bulk Buyers

Copper coated steel wire (CCS wire) is a versatile and cost-effective material used in telecommunications, electrical grounding, and fencing applications. For bulk buyers and wholesalers, understanding the key specifications ensures you select the right product for your needs. This guide covers essential CCS wire specifications, including material composition, conductivity, tensile strength, and industry standards.

1. Material Composition
Copper coated steel wire consists of a high-strength steel core with an outer layer of copper. The thickness of the copper coating is critical and is typically measured in microns. Common ratios include:

30% Copper / 70% Steel – Ideal for high-strength applications
40% Copper / 60% Steel – Balanced conductivity and durability
Thin Copper Coating (5-15 microns) – Cost-effective for general use
Thick Copper Coating (20-40 microns) – Enhanced conductivity for electrical applications

2. Conductivity and Electrical Performance
CCS wire provides better conductivity than pure steel while being more affordable than solid copper. Key electrical specifications include:

Conductivity (% IACS): Typically ranges from 20% to 40% (compared to pure copper)
Resistance: Measured in ohms per kilometer (Ω/km), varies based on wire diameter
Skin Effect: High-frequency applications benefit from copper’s surface conductivity

3. Tensile Strength and Durability
Steel core provides superior tensile strength, making CCS wire suitable for demanding environments:

Tensile Strength: 500-1500 MPa (depending on steel grade)
Elongation: 1-5% (ensures flexibility without breaking)
Corrosion Resistance: Copper layer protects against rust, but additional coatings (e.g., zinc) may be applied

4. Common Wire Gauges and Diameters
CCS wire is available in various diameters (AWG or mm) to suit different applications:

Thin Wire (24-18 AWG): Used in electronics and fine conductors
Medium Wire (14-10 AWG): Ideal for grounding and fencing
Thick Wire (8-2 AWG): Heavy-duty applications like power transmission

5. Industry Standards and Certifications
Reputable manufacturers comply with international standards, including:

ASTM B910 (Standard for CCS wire)
IEC 60888 (Telecommunications use)
UL Certification (Safety compliance)

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