What is C12000 copper?
C12000 phosphorus-deoxidized copper for welding is a copper alloy material conforming to GB/T 2059-2000 standard. Its copper + silver content is ≥99.90%, and it contains trace amounts of phosphorus. This material possesses excellent weldability and cold bending properties, making it suitable for applications such as gasoline or gas transmission pipes, drainage pipes, condenser pipes, mine casings, condensers, evaporators, heat exchangers, and train car parts. It has a tensile strength of 245–345 MPa and an elongation of ≥8%, combining good weldability and cold bending characteristics, and is suitable for processing in reducing atmospheres. It is mainly used in industrial fields such as gasoline or gas transmission pipes, condensers, and heat exchangers, and can be manufactured into various profiles including pipes and plates.
We provide TP1/C12000 copper pipes
Inquire about C12000 Tube Pricing & Samples
Chemical Composition and Properties
Copper + Silver content ≥99.90%, phosphorus content 0.004%～0.012%, and trace amounts of tin, zinc, and other elements. It exhibits outstanding mechanical properties, with a tensile strength of 245～345MPa, elongation ≥8%, and a hardness range of 75～120HV. This material effectively eliminates the risk of "hydrogen slag" through a phosphorus deoxidation process, maintaining stability during welding and cold working.
Physical Properties
|
Property |
Value |
|
Density |
8.9 g/cm³ |
|
Conductivity |
90-93% IACS |
|
Thermal Conductivity |
350 W/(m·K) |
|
Thermal Expansion Coefficient |
17.7×10⁻⁶/K |
|
Elastic Modulus |
132 GPa |
|
Melting Point |
1083°C |
Mechanical Properties
|
State |
Tensile Strength (MPa) |
Elongation (%) |
Vickers Hardness (HV) |
|
Hard (Y) |
≥275 |
≥5 |
80-110 |
|
Annealed (M) |
≥200 |
≥40 |
50-70 |
Product Applications
Refrigeration Industry: Air conditioning condenser tubes, refrigerator evaporators.
Chemical Equipment: Corrosion-resistant pipelines, reactor linings.
Electrical Electronics: Cable conductors, heat sink substrates.
Architectural Decoration: Art sculptures, weather-resistant roofing materials.
C12000 vs C10200
| Feature | UNS C12000 | UNS C10200 |
|---|---|---|
| Common Name | Phosphorus Deoxidized, Low Residual P (DLP) | Oxygen-Free Copper (OF) |
| Key Composition | Cu ≥99.90%, P: 0.004-0.012% | Cu ≥99.95%, O ≤0.0005% |
| Oxygen Content | Very Low | Extremely Low (Virtually Zero) |
| Deoxidizer | Phosphorus | None (Process-controlled) |
| Electrical Conductivity | Very High (~100% IACS) | Highest (~101%+ IACS) |
| Thermal Conductivity | Very High | Slightly Higher |
| Formability & Ductility | Excellent | Superior (especially in annealed state) |
| Weldability & Brazability | Excellent (due to P deoxidation) | Excellent (requires inert atmosphere) |
| Resistance to Hydrogen Embrittlement | Poor (in reducing atmospheres) | Very Good (no Cu₂O to react) |
| Typical Applications | High-conductivity busbars, heat exchangers, tubing | High-vacuum electronics, glass-metal seals, waveguides, sputtering targets |
Choose C10200 (Oxygen-Free Copper) when your priority is:
Maximum Purity & Conductivity: For critical electrical/electronic components (e.g., waveguides, semiconductor parts).
High-Temperature in Hydrogen: For service in reducing atmospheres (e.g., hydrogen furnaces, brazing atmospheres) where hydrogen embrittlement is a risk.
Superior Ductility & Forming: For severe cold working and deep drawing applications.
High-Vacuum or Sealing Applications: Where outgassing or oxidation at high temperatures must be absolutely minimized (e.g., glass-metal seals, accelerator parts).
Choose C12000 (Phosphorus Deoxidized Copper) when your priority is:
Excellent Conductivity at Lower Cost: For high-performance busbars, electrical conductors, and heat exchangers where C10200's marginal gain isn't justified.
Easier Joining in Air: Its deoxidized nature makes it very forgiving for welding and brazing in standard shop environments.
General High-Conductivity Applications: Where hydrogen embrittlement is not a concern (e.g., standard electrical components, non-reducing atmosphere heat transfer).
Good Balance of Performance and Practical Fabrication.
Check Today's Stock & Lead Time
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.
Get Fast Quote & Logistics Plan
