What is C12000 copper?
Copper C12000 is a copper alloy used for manufacturing pipes and tubes. It offers superior corrosion resistance, making it ideal for use in a variety of industrial and commercial applications. The high–strength–to–weight ratio of C12000 makes it an excellent choice for applications requiring maximum durability and flexibility. Its resistance to stress cracking also makes it suitable for use in water supply systems, plumbing fixtures, food processing equipment, and other products where extended service life is critical. With its lightweight construction and high-temperature performance characteristics, Copper C12000 pipes are sure to provide reliable service in every project.
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C12000 Typical Chemical Composition:
Copper content: >99.9%
Phosphorus content: 0.004–0.012%
Residual oxygen: ≤0.01%
Total impurities: ≤0.1%
Key Physical Performance Parameters:
Density: 8.89 g/cm³ (20°C)
Electrical conductivity: 85–90% IACS (annealed state)
Thermal conductivity: 340 W/(m·K)
Tensile strength: 220–380 MPa
Elongation: ≥12% (hard state) to ≥40% (annealed state)
Core Differences Compared to Oxygen-Free Copper Series:
Deoxidation process: Phosphorus deoxidation method (distinct from vacuum-melted oxygen-free copper)
Microstructure: Contains trace Cu₃P phases, improving hot workability
Welding characteristics: No hydrogen embrittlement risk during welding, superior to standard electrolytic copper
Cost positioning: Mid-range between oxygen-free copper and standard electrolytic copper
Core Advantageous Properties:
1. Hot Work Performance:
Hot rolling crack sensitivity reduced by 60% compared to standard electrolytic copper
Suitable hot working temperature range expanded to 650–850°C
Hot rolling pass reduction rate can exceed 50%
2. Welding Performance:
Excellent brazing properties, with flowability improved by 30% compared to standard copper
Suitable for various welding methods including oxyacetylene welding, arc welding, and TIG welding
Particularly well-suited for high-frequency induction brazing processes
3. Corrosion Resistance Characteristics:
High-temperature oxidation resistance superior to oxygen-free copper (25% lower oxidation rate at 800°C)
Significantly improved resistance to stress corrosion cracking
Good stability in sulfur-containing environments
FAQ
Q: What's the maximum continuous service temperature for C12000?
A: 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).
Q: How should C12000 tubes be stored to prevent oxidation?
A: 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.
Q: Can C12000 be bent easily?
A: Yes, especially in the annealed temper. For hard temper tubes, bending may require a mechanical bender to avoid kinking or cracking.
Q: What is the difference between TP1 (C12000) and TP2 (C12200) copper?
A: TP1 (C12000) and TP2 (C12200) are both phosphorus-deoxidized coppers, but they differ in residual phosphorus content: TP1 (C12000): Low residual phosphorus (0.004–0.012%). Designed for applications requiring high conductivity and good weldability, such as heat exchangers and electrical components. TP2 (C12200): Higher phosphorus content (0.015–0.040%). Offers improved weldability and brazability due to better deoxidation, but has slightly lower electrical conductivity (~80% IACS). Commonly used in plumbing, HVAC, and piping systems where welding/brazing is critical. Key takeaway: TP1 prioritizes conductivity, while TP2 prioritizes weldability and brazing performance.
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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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