Deoxidized High Residual Phosphorus (DHP) Copper, designated as C12200, is a high-purity copper alloy containing a controlled amount of phosphorus. The phosphorus removes oxygen during refining, preventing copper oxide formation and eliminating hydrogen embrittlement.
C12200 is one of the most widely used copper grades globally, especially for plumbing, HVAC, heat exchangers, and tube applications, where brazing, welding, and long-term corrosion resistance are critical.
Chemical Composition (Typical)
| Element | Typical Value |
|---|---|
| Copper (Cu) | ~99.9% |
| Phosphorus (P) | 0.015 – 0.040% |
| Oxygen | Essentially Nil |
Electrical & Thermal Properties
| Property | Typical Value |
|---|---|
| Electrical Conductivity | ~85 – 88% IACS |
| Thermal Conductivity | Very Good |
| Density | ~8.94 g/cm³ |
Mechanical Properties
| Property | Typical Range |
|---|---|
| Tensile Strength | ~210 – 250 MPa |
| Yield Strength | ~70 – 200 MPa |
| Elongation | High (Excellent ductility) |
Strengthening & Metallurgical Behavior
✔ Solid-solution strengthening by phosphorus
✔ Oxygen removal prevents Cu₂O formation
✔ No precipitation hardening
✔ Properties controlled by cold work and temper
Key Applications
Plumbing & Building Services
Water pipes, gas tubing, fire sprinkler systems
HVAC & Refrigeration
Air-conditioning tubes, condenser & evaporator coils
Thermal & Industrial
Heat exchangers, solar thermal collectors, industrial piping
Electrical (Non-Critical)
Grounding components, welded electrical connectors
Advantages of DHP Copper C12200
✔ Excellent brazability and weldability
✔ Resistant to hydrogen embrittlement
✔ High corrosion resistance in water systems
✔ Good thermal conductivity
✔ Easy fabrication and forming
✔ Cost-effective and globally available
Why Choose C12200?
C12200 is the best all-round copper grade for tubing, piping, and heat-transfer systems where reliable joining, corrosion resistance, and long service life are essential.
Comparison:
C10200 (OF Copper): Maximum conductivity
C11000 (ETP Copper): Electrical use, limited welding
C12200 (DHP Copper): Best choice for HVAC, plumbing & heat exchangers