What is C12000 copper?
C12000 oxygen-free copper is a high-performance copper alloy material with excellent electrical and thermal conductivity, corrosion resistance, and processing performance. It is widely used in energy transmission, heat exchange, and transportation.
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Chemical Composition
Copper (Cu) + Silver (Ag) content ≥99.90%, Phosphorus (P) content 0.004%~0.012%, Total impurities ≤0.1%.
The addition of phosphorus reduces the oxygen content through a deoxidation process, while simultaneously improving the material's ductility and corrosion resistance.
Performance Advantages
lectrical and Thermal Conductivity: Due to its lower residual phosphorus content compared to TP2, it exhibits superior electrical and thermal conductivity, making it suitable for applications requiring high thermal conductivity.
Corrosion Resistance: Resistant to corrosion in ambient air, fresh water, and seawater; resistant to cold/hot dilute sulfuric acid and cold concentrated acid, but corrodes rapidly in sulfur, nitrogen solutions, and nitric acid.
Processing Performance: Good weldability and cold bending performance; no tendency for "hydrogen embrittlement"; suitable for processing in reducing atmospheres.
Biological resistance: A copper ion protective layer is formed on the surface of seawater, inhibiting the attachment of marine organisms.
Product Applications
Electrical connectors and terminals.
Heat exchangers and cooling systems.
Busbars and power transmission components.
Plumbing fittings and HVAC systems.
Semiconductor lead frames.
Equivalents of UNS C12000 Copper
| Standard | Designation | Name / Description | Key Similarities |
|---|---|---|---|
| UNS (USA) | C12000 | Phosphorus Deoxidized, Low Residual Phosphorus (DLP) | Base Standard |
| ASTM (USA) | B152, B124 | C12000 | |
| CDA (USA) | 120 | - | Industry Standard |
| ISO | Cu-DLP | Copper - DLP (Chemical Symbol) | Closest ISO Chemical Designation |
| EN (Europe) | Cu-DLP (EN 1412) CW024A (EN 13599) |
Copper - DLP | Chemical Composition Equivalent |
| JIS (Japan) | C1201 | Phosphorus Deoxidized Copper | Nearly Identical |
| GB (China) | TP2 (Old: T2P) | Phosphorus Deoxidized Copper | Note: TP2 is generally considered the closest match, though phosphorus content may differ slightly. |
| DIN (Germany) | SF-Cu (DIN 1708) | Deoxidized Copper with Low Residual Phosphorus | |
| BS (UK) | C106 | Phosphorus Deoxidized Copper for General Purposes |
FAQ
Q1: Can C12000 be used in marine environments?
A: Yes, due to its corrosion resistance, but regular maintenance is advised.
Q2: How does phosphorus content affect performance?
A: Low phosphorus minimizes brittleness while maintaining conductivity.
Q3: Is C12000 suitable for brazing?
A: Yes, but ensure proper flux and temperature control.
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Dimensional Range Table
In plumbing and HVAC standards, copper tubing is commonly classified into three main types based on wall thickness: Type K, Type L, and Type M.
Type K: Has the thickest wall. It is the strongest and most durable, primarily used for underground burial, high-pressure applications, and where the highest level of protection is required.
Type L: Has a medium wall thickness. It is the most common and versatile type, widely used for residential and commercial water supply lines (hot and cold) and for many HVAC applications.
Type M: Has the thinnest wall. It is suitable for above-ground, low-pressure residential water supply lines and some drainage applications, offering a cost-effective solution where conditions allow.
The outside diameter (OD) is the same for all three types within a given nominal size. The difference lies in the inner diameter (ID), which decreases as the wall gets thicker.
| Nominal Size (inches) | Type K | Type L | Type M |
|---|---|---|---|
| Outside Diameter (OD) | Same for all types | ||
| Wall Thickness | Thickest | Medium | Thinnest |
| Inside Diameter (ID) | Smallest | Medium | Largest |
| 1/2" | OD: 0.625" ID: 0.527" Wall: 0.049" |
OD: 0.625" ID: 0.545" Wall: 0.040" |
OD: 0.625" ID: 0.569" Wall: 0.028" |
| 3/4" | OD: 0.875" ID: 0.745" Wall: 0.065" |
OD: 0.875" ID: 0.785" Wall: 0.045" |
OD: 0.875" ID: 0.811" Wall: 0.032" |
| 1" | OD: 1.125" ID: 0.995" Wall: 0.065" |
OD: 1.125" ID: 1.025" Wall: 0.050" |
OD: 1.125" ID: 1.055" Wall: 0.035" |
Our factory
Our factory is built for precision and scale in producing copper rods, tubes, plates, bars, wires, and strips. We operate advanced equipment such as upward continuous casting systems for oxygen-free copper rods, CNC-controlled pilger mills for seamless tubes, and automated strip rolling lines with real-time thickness monitoring. All products are manufactured to meet ASTM, DIN, and customer-specific standards, with process control at every stage. Our quality assurance includes metallographic analysis, conductivity testing, and surface quality inspection via optical comparators. From raw material to finished product, we ensure consistency, performance, and on-time delivery for industrial and OEM partners globally.
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Copper product packaging
Our copper product packaging always prioritizes safety protection and professional identification. Copper rods and profiles are securely bundled with steel straps and fixed on reinforced wooden pallets, with waterproof and moisture-proof film wrapped around the exterior. Copper tubes are equipped with protective caps on both ends and packaged in custom-designed cartons or wooden crates with internal cushioning materials. Copper plates and strips are interleaved with anti-rust paper and fully encapsulated in steel-edged crates. All packages are affixed with clear product labels, specifications, and moisture-proof tags. For high-purity copper materials or those with special application requirements (such as oxygen-free copper wires and high-end copper strips), we also offer professional nitrogen-filled sealed packaging to ensure complete oxygen isolation during transportation and storage, preventing oxidation and maintaining the optimal performance and surface condition of the materials.
