DHP Copper

DHP Copper, also known as Deoxidized High Phosphorus Copper, is a highly utilized copper alloy known for its excellent corrosion resistance, thermal and electrical conductivity, and ease of fabrication. It is commonly used in plumbing, heating, and industrial applications.

Composition:

Copper (Cu): 99.90%
Phosphorus (P): 0.015-0.040%

Grades

ASTM B 68 C 12200:

ASTM B68: Standard Specification for Seamless Copper Tube, Bright Annealed.
C12200: Designation for DHP Copper in this standard.

ASTM B 75 DLP C 12000:

ASTM B75: Standard Specification for Seamless Copper Tube.
C12000: Designation for Deoxidized Low Phosphorus Copper in this standard.

BS 2871 Part 2 C 101:

British Standard for copper tubes.
C 101: Designation for DHP Copper in this standard.

BS 2871 Part 3 C 106:

British Standard for copper tubes used in general engineering applications.
C 106: Designation for DHP Copper in this standard.

EN 12451 DB-IP - CW 024A:

European standard for copper and copper alloys – Seamless, round tubes for heat exchangers.
CW 024A: European designation for DHP Copper.

JIS H 3300 C 1220:

Japanese Industrial Standard for copper and copper alloy seamless tubes.
C 1220: Japanese designation for DHP Copper.

Properties:

Corrosion Resistance:
- Excellent resistance to corrosion in various environments including freshwater, seawater, and industrial atmospheres.
- Resistant to dezincification, making it suitable for water supply systems.
Mechanical Properties:
- Tensile Strength: Typically around 210-250 MPa.
- Yield Strength: Approximately 50-100 MPa.
- Elongation: Generally around 35-45%, providing good ductility.
- Hardness: Moderate hardness, with a typical Brinell hardness number (HB) of around 40-70.
Thermal and Electrical Conductivity:
- High thermal conductivity, making it ideal for heat exchangers and other thermal applications.
- Good electrical conductivity, though slightly lower than pure copper due to the presence of phosphorus.

Applications:

Plumbing and Heating: Used extensively in plumbing systems for water supply and heating due to its corrosion resistance and ease of fabrication.
Heat Exchangers: Ideal for heat exchanger tubes due to its excellent thermal conductivity and resistance to corrosion.
Industrial Applications: Employed in industrial equipment where good corrosion resistance and ease of welding are required.
Electrical Applications: Used in electrical components where good conductivity is needed, though slightly lower than pure copper.