Cu-DHP
CW024APhosphorus-deoxidized copper (DHP = Deoxidized High Phosphorus, 0.015-0.040% P). THE material for copper plumbing tubes worldwide (EN 1057). P prevents hydrogen embrittlement during brazing/welding — essential for plumbing/HVAC joints. Slightly lower electrical conductivity than Cu-ETP (85% IACS vs 101%) due to P content. UNS C12200. Used for plumbing tubes, heating systems, solar thermal, refrigeration tubes, and architectural roofing.
International equivalents
| Flag | Standard | Country | Grade | Number | Match |
|---|---|---|---|---|---|
| 🇺🇸 | UNS | USA | UNS C12200 | C12200 | REF |
| 🇪🇺 | EN | Europe | Cu-DHP / CW024A | CW024A | 100% |
Sources: ASTM B88, EN 1652
Chemical composition comparison (wt%)
Side-by-side: Cu-DHP (EN) (EN 1652) vs Cu-DHP / CW024A (EN) (EN 1652)
| Element | Cu-DHP (EN) | Cu-DHP / CW024A (EN) | Overlap |
|---|---|---|---|
| P | 0.015–0.04% | 0.015–0.04% | OK |
| Cu | ≥ 99.9% | ≥ 99.9% | OK |
Mechanical properties
Annealed
| Property | Value | Unit |
|---|---|---|
| Tensile Strength | 200–260 | MPa |
| Yield Strength | 40–80 | MPa |
| Elongation | 40–50 | % |
| Elastic Modulus | ≥ 117 | GPa |
| Density | ≥ 8.94 | g/cm3 |
Compatibility verdict
Cu-DHP and Cu-DHP / CW024A: 100% composition match
Close equivalents but NOT identical.
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