Phosphorus Deoxidized Copper (DHP / DLP)
High-Performance Copper Tube & Heat Transfer Solutions by Huaxiao-Alloy
1. What Is Phosphorus Deoxidized Copper?
Phosphorus Deoxidized Copper (PDC) is a copper grade refined with a controlled amount of phosphorus to remove dissolved oxygen during melting. This process significantly improves weldability, brazability, and corrosion resistance, making it one of the most widely used copper materials for tubes, pipes, and heat transfer systems.
At Huaxiao-Alloy, Phosphorus Deoxidized Copper is positioned as a functional engineering solution, specifically designed for fluid systems, HVAC, heat exchangers, and industrial piping, rather than a simple copper raw material.
2. Phosphorus Deoxidized Copper Grades & UNS Numbers
| Grade | UNS No. | Common Designation |
|---|---|---|
| DHP | UNS C12200 | Phosphorus Deoxidized, High Phosphorus |
| DLP | UNS C12000 | Phosphorus Deoxidized, Low Phosphorus |
Huaxiao-Alloy Technical Insight:
C12200 (DHP) is the most commonly used grade for plumbing and heat exchanger tubes due to excellent joining performance.
C12000 (DLP) provides higher electrical conductivity where minimal phosphorus is required.
3. Chemical Composition
| Element | C12200 (%) | C12000 (%) |
|---|---|---|
| Copper (Cu) | ≥ 99.90 | ≥ 99.90 |
| Phosphorus (P) | 0.015–0.040 | 0.004–0.012 |
| Oxygen (O) | Residual | Residual |
| Other Elements | ≤ 0.05 | ≤ 0.05 |
Why Phosphorus Matters:
Phosphorus eliminates oxygen-related defects, enabling defect-free welding, brazing, and tube expansion.
4. Mechanical & Physical Properties
| Property | Typical Value |
|---|---|
| Electrical Conductivity | 85–92% IACS |
| Thermal Conductivity | ~330 W/m·K |
| Density | 8.94 g/cm³ |
| Tensile Strength | 210–260 MPa |
| Elongation | ≥ 30% |
Huaxiao-Alloy can optimize properties through annealing or cold working, depending on end-use requirements.
5. Key Advantages of DHP / DLP Copper
Excellent brazing and welding performance
Superior corrosion resistance in water and refrigerants
No hydrogen embrittlement risk
High formability for tube bending and expansion
Long service life in fluid and thermal systems
6. Typical Applications
Huaxiao-Alloy supplies Phosphorus Deoxidized Copper for:
HVAC and refrigeration tubes
Heat exchangers and condensers
Plumbing and potable water systems
Solar thermal systems
Industrial fluid pipelines
This grade is the industry standard for copper tube systems worldwide.
7. Available Forms & Supply Capabilities
Tubes & Pipes (seamless / welded)
Plates & Sheets
Bars & Rods
Standards Supported:
ASTM B75 / ASTM B88 / ASTM B280
UNS C12200 / C12000
EN CW024A / CW017A
Huaxiao-Alloy Capabilities:
Custom OD, wall thickness & length
Precision drawing & straightening
Export-grade packaging for long-distance shipping
8. DHP vs ETP Copper – Which Should You Choose?
| Property | DHP / DLP Copper | ETP Copper |
|---|---|---|
| Phosphorus | Present | None |
| Electrical Conductivity | Lower | Higher |
| Welding / Brazing | Excellent | Moderate |
| Typical Use | Tubes, piping, heat systems | Electrical conductors |
Huaxiao-Alloy Recommendation:
For pipes, HVAC, or brazed systems, DHP is the technically correct choice.
9. Standards & Quality Assurance
ASTM / UNS / EN compliance
ISO quality management
ROHS & REACH available
Full material traceability
Huaxiao-Alloy ensures stable quality for long-term projects.
Yes. C12200 is widely approved for potable water and plumbing systems.
Yes. We support custom lengths and coil packaging.
No. Phosphorus improves joining performance without compromising corrosion resistance.
11. Why Choose Huaxiao-Alloy?
One-stop supplier for all copper grades
Deep expertise in tube materials and thermal systems
Custom processing & export compliance support
Stable supply for HVAC and industrial projects
Engineering-driven, solution-oriented service
Huaxiao-Alloy helps you choose the right copper for real-world applications.
12. Get a Quote – Professional Copper Solutions
📧 Email: [email protected]
📱 WhatsApp: +1 (579) 300-2733
Let Huaxiao-Alloy support your copper tube and heat transfer systems with confidence.
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