What is C12000 copper?
C12000 is a high-performance phosphorus-deoxidized copper material widely used in industrial applications due to its excellent electrical conductivity, thermal conductivity, and workability. Its chemical composition is strictly controlled, with the main component being copper (Cu) content not less than 99.9% and trace amounts of phosphorus (P) added as a deoxidizing agent. The phosphorus content is typically maintained within the range of 0.004%–0.012%. This unique composition not only enhances the material's purity but also significantly improves its corrosion resistance and weldability, while avoiding the hydrogen embrittlement issues commonly associated with ordinary pure copper.
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Application Scenarios
Energy and Chemical Industry
Gas Transmission Pipelines: Used for transporting gasoline, natural gas, and liquefied petroleum gas (LPG), offering strong corrosion resistance and excellent sealing properties.
Condensation and Heat Exchange Systems: Serves as a core material for condenser tubes, evaporators, and heat exchangers, providing efficient heat transfer and resistance to scaling.
Transportation and Military Equipment
Railway Carriage Components: Used in manufacturing connectors and brake system pipes, with lightweight designs improving energy efficiency.
Naval Mines and Ship Piping: Resistant to seawater corrosion, used in fluid transmission systems for underwater equipment.
Electronics and Power Industry
High-Frequency Circuits and Connectors: Low-resistance characteristics reduce signal attenuation, suitable for 5G base stations and data centers.
Transformer and Motor Windings: High electrical conductivity reduces energy consumption and improves equipment efficiency.
Construction and Daily Life Applications
Drainage and Water Supply Systems: Copper pipes exhibit strong antibacterial properties and comply with drinking water hygiene standards.
Decoration and Handicrafts: Surfaces can be oxidized and colored for use in high-end architectural decorations and artwork production.
C12000 Phosphorus-Deoxidized Copper – Technical Data
| Category | Property | Specification / Value | Remarks |
|---|---|---|---|
| Chemical Composition | Copper (Cu) | ≥ 99.9 % | Primary constituent |
| Phosphorus (P) | 0.004 % – 0.012 % | Deoxidizing agent, improves weldability and corrosion resistance | |
| Oxygen (O) | ≤ 0.01 % | Very low residual oxygen prevents hydrogen embrittlement | |
| Total Other Impurities | ≤ 0.1 % | Includes Fe, Pb, Sn, etc. | |
| Physical Properties | Density | 8.94 g/cm³ (at 20°C) | Typical value |
| Electrical Conductivity | ≥ 98 % IACS (annealed) | Close to pure copper level | |
| Thermal Conductivity | 340 – 400 W/(m·K) | Excellent heat dissipation | |
| Melting Point | ~1083 °C | Similar to pure copper | |
| Thermal Expansion Coefficient | 17.0 × 10⁻⁶ /K (20–300°C) | Good dimensional stability under temperature changes | |
| Mechanical Properties | Tensile Strength | 245 – 345 MPa (annealed) | Strength can be adjusted by cold working |
| Yield Strength (0.2% offset) | ≥ 83 MPa (annealed) | ||
| Elongation | ≥ 45 % (annealed) | Excellent ductility and formability | |
| Hardness | HV 65 – 85 (annealed) | Can be increased by cold working | |
| Modulus of Elasticity | ~115 – 130 GPa | Typical stiffness for copper alloys |
C12000 Equivalent Grade
| Standard System | Grade/Designation | Name / Description |
|---|---|---|
| United States (ASTM/UNS) | C12000 | Phosphorus-Deoxidized Copper, Low Residual Phosphorus (DLP) |
| China (GB) | TP1 (T2 is common pure copper, TP1 is deoxidized) | Phosphorus-Deoxidized Copper (Low Phosphorus) |
| Japan (JIS) | C1201 | Phosphorus-Deoxidized Copper (Low Phosphorus) |
| Europe (EN) | CW024A (formerly Cu-DLP) | Deoxidized Copper with Low Phosphorus Residual |
| Germany (DIN) | Cu-DLP | Desoxidierter Kupfer mit niedrigem Phosphorgehalt |
| International (ISO) | Cu-DLP (ISO 431/Type DLP) | Copper, Deoxidized, Low Phosphorus |
| Common Trade Names | DLP Copper, SWP Copper (Special Working Properties) | Low-Phosphorus Deoxidized Copper for Welding & Forming |
FAQ
| Does C12000 copper corrode in water systems? It has excellent corrosion resistance in clean, non-aggressive water. However, like all copper, it can be affected by acidic water, high-velocity flow, or certain chemicals (e.g., ammonia, sulfides). |
| Is C12000 suitable for underground water lines? Yes, especially when using Type K thick-walled tubing for burial. Its corrosion resistance and strength make it a durable choice for direct burial when soil conditions are non-aggressive. |
| What standards cover C12000 copper tubes? ASTM B75 (seamless), B280 (ACR tubes), EN 12735-1, and JIS H3300 are key standards for tubing. ASTM B152 covers sheet/plate forms. |
| What tempers are available for C12000 tubing? Common tempers are annealed (soft, O60), drawn (hard, H58), and light-drawn (H55). Annealed offers maximum formability; drawn provides higher strength. |
| Can C12000 be used in oxygen service or medical gas systems? Yes, after proper cleaning and degreasing, C12000 tubes are widely used in medical gas (oxygen, nitrous oxide) and high-purity gas systems due to their cleanliness and non-permeability. |
| How does phosphorus affect conductivity in C12000? The low residual phosphorus slightly reduces electrical conductivity (~85% IACS) compared to pure C11000 (~101% IACS), but it remains excellent for most thermal and electrical applications. |
| Is C12000 susceptible to stress corrosion cracking (SCC)? Copper alloys are generally less prone to SCC than brasses, but in environments with ammonia, amines, or nitrites, SCC can occur. Proper design and avoiding sustained tensile stress in such environments are recommended. |
| What's the maximum continuous service temperature for C12000? Typically up to about 150–200°C (302–392°F) for long-term service. Short-term exposure can go higher, but annealing and softening will occur above ~250°C (482°F). |
| How should C12000 tubes be stored to prevent oxidation? Store in a dry, covered area. For long-term storage or in humid climates, sealed plastic wrapping or nitrogen purging is recommended to prevent surface tarnishing. |
| Can C12000 be bent easily? Yes, especially in the annealed temper. For hard temper tubes, bending may require a mechanical bender to avoid kinking or cracking. |
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Dimensional Range Table
| Product Category | Standard / Grade | Typical Sizes (Outer Diameter) | Wall Thickness | Available Forms | Common Applications |
|---|---|---|---|---|---|
| Seamless Copper Tube | ASTM B68, B75, B88, B280, B819, EN1057, etc. | 3 mm ~ 300 mm (1/8" ~ 12") |
Light gauge to Schedule K (Customizable per standard) |
Straight Lengths, Coils | Plumbing, HVAC, Medical Gas, Industrial Pipelines |
| Capillary Tube | ASTM B360 | 0.5 mm ~ 12 mm (0.02" ~ 1/2") |
Ultra-thin walls (As per drawing) |
Straight Lengths, Coils | Instrumentation, Refrigeration, Heat Exchangers |
| Copper Pipe for Plumbing | ASTM B88 (Type K, L, M) | 6 mm ~ 254 mm (1/4" ~ 10") |
Type M (thin), L (standard), K (thick) | Straight Lengths (20ft), Coils | Potable Water Systems, Heating, Cooling |
| ACR Tube (Refrigeration) | ASTM B280 | 6.35 mm ~ 158.8 mm (1/4" ~ 6-1/8") |
ACR standard wall | Straight Lengths, Bundled Coils | Refrigeration, Air Conditioning |
| Medical Gas Copper Tube | ASTM B819, ISO 7396-1 | 6 mm ~ 108 mm (1/4" ~ 4-1/4") |
Cleaned & degreased Oxygen service grade |
Straight Lengths, Capped Ends | Oxygen, Medical Air, Vacuum Systems |
| Large Diameter Copper Pipe | Custom Drawn | Up to 457 mm (18") | Heavy wall, custom schedules | Straight Lengths (custom cut) | Industrial Process Lines, Marine, Specialty Applications |
Our factory
Our production facility is a modern, vertically integrated copper products factory equipped with state-of-the-art extrusion, drawing, annealing, and cleaning production lines. We specialize in producing seamless copper tubes of various sizes, from capillary tubes to large-diameter industrial pipes, all conforming to international standards such as ASTM, EN, and DIN. The factory strictly adheres to a quality management system (ISO 9001 certified) and utilizes advanced testing equipment, including spectrometers, hydrostatic testing machines, and oxygen pipeline cleanliness testing systems. With an annual production capacity exceeding 15,000 tons, we have a reliable supply record in industries such as HVAC, piping, medical gases, and shipbuilding, and are committed to providing high-precision, fully traceable, and on-time delivered products.
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