Tinned Copper Wire

Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of tinned copper wire in China, also supports customized service. Welcome to buy discount tinned copper wire for sale here from our factory. Quality products and reasonable price are available.

 

Our Tinned Copper Wire represents the perfect synergy of electrical efficiency and environmental durability. Manufactured using 99.9% pure T2 copper as the core, each strand is meticulously electroplated or hot-dipped with a uniform layer of high-purity tin.

This tinning process serves a dual purpose: it acts as a sacrificial barrier against atmospheric moisture and chemicals, and it prevents the copper from reacting with rubber or plastic insulation materials over time. Whether you are wiring a luxury yacht, assembling high-drain battery packs, or manufacturing precision circuit boards, our tinned copper wire ensures your electrical systems remain stable and conductive for decades, even in the harshest conditions.

 

Marine Wiring: Essential for boat electrical systems, offshore equipment, and underwater sensors.

Battery & EV Systems: High-current busbars, battery interconnects, and EV charging cables.

Aerospace & Defense: Wiring harnesses requiring extreme reliability and resistance to thermal cycling.

Solar & Renewable Energy: Outdoor cabling for solar arrays where exposure to the elements is constant.

 

Element	Content (%)
Core Material	T2 High Purity Copper (≥ 99.90%)
Plating Material	Pure Tin (Sn ≥ 99.9%)
Plating Method	Electro-tinning / Hot-dip Tinning
Standard	ASTM B33, IEC 60228

 

Property	Value
Conductivity (IACS)	≥ 95% - 98% (Depending on diameter)
Electrical Resistivity	≤ 0.0176 Ω·mm²/m
Thermal Conductivity	380 W/(m·K)
Solderability Test	95% Coverage (Dip & Look test)

 

Property	Specification
Tensile Strength	200 - 280 MPa (Soft Annealed)
Elongation at Break	≥ 20% - 35%
Plating Thickness	1.0 µm - 5.0 µm (Customizable)
Adhesion	Excellent (No peeling after wrap test)

 

Feature	Tinned Copper (Sn/Cu)	Bare Copper (C11000)	Silver Plated Copper
Corrosion Resistance	Excellent	Poor (Oxidizes fast)	Best
Soldering Ease	Easiest	Moderate	Excellent
Cost	Economical/Standard	Lowest	Premium
Typical Use	Marine/Automotive	Standard Electrical	Aerospace/High-Freq

 

Q1: Why is tinned copper wire better than bare copper?

A: Tinned copper has a thin coating of tin that prevents the copper core from oxidizing. This is crucial in humid or salty environments where bare copper would turn green (corrode), increasing resistance and leading to electrical failure.

 

Q2: Does the tin coating affect the conductivity of the wire?

A: The impact is negligible. While pure tin is less conductive than copper, the coating is so thin that the wire still maintains approximately 95-98% conductivity of bare copper, which is more than sufficient for almost all electrical applications.

 

Q3: Is this wire easy to solder?

A: Yes! One of the biggest advantages of tinned copper is its excellent solderability. The tin layer allows the solder to flow and bond almost instantly, making it much easier to work with than bare copper which might have an invisible oxide layer.

 

Q4: Is your tinned copper wire suitable for marine use?

A: Absolutely. It is designed to meet marine-grade specifications. The tin plating provides the necessary protection against the corrosive effects of salt air and water, which is why it's the standard for boat wiring.

 

Spanning over 25000 square meters, our state-of-the-art manufacturing facility is equipped with high-precision continuous tinning lines and automated wire drawing systems. We specialize in high-quality Tinned Copper and Bare Copper processing, implementing a vertical quality control system-from copper purity analysis to final tin-layer thickness and solderability testing-ensuring every spool meets international industrial standards.

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