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C122
Copper 122 – Phosphorus-Deoxidized (DHP) Tube
C12200
Overview
Copper 122 (C12200) is a phosphorus-deoxidized, high-residual-phosphorus copper (DHP). Immune to hydrogen embrittlement and significantly easier to braze and weld than ETP grades.
Chemical Composition
| Element | Min | Max |
|---|---|---|
| Copper (Cu) | 99.90% | — |
| Phosphorus (P) | 0.015% | 0.040% |
Alloy Designations
UNSC12200
Common NameDHP Copper / Phosphorized Copper
ASTMB75, B88, B280
Mechanical Properties
Ultimate Tensile Strength49,300 psi (340 MPa)
Yield Tensile Strength45,000 psi (310 MPa)
Elongation45% (Annealed)
Modulus of Elasticity17,400 ksi (120 GPa)
Physical Properties
Density8.94 g/cm³ (0.323 lb/in³)
Melting Point (Liquidus)1,082°C (1,980°F)
Electrical Conductivity85% IACS
Thermal Conductivity339 W/m·K
Typical Applications
- Plumbing tubes
- Air conditioning and refrigeration tubing
- Heat exchanger tubes
- Brewery and dairy processing tubes
- Oil, gas, and hydraulic lines
Fabrication & Joining
- Excellent brazing and welding characteristics
- Immune to hydrogen embrittlement
- Excellent formability for bending and flaring
- Soldering: Excellent
- Brazing: Excellent
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