ASTM B88 UNS C12200 Copper Tube
ASTM B88 UNS C12200 Copper Tube is produced from phosphorus-deoxidized copper (Cu-DHP) with a minimum copper content of 99.90%. UNS C12200 is the most commonly specified copper grade under ASTM B88, valued for its excellent corrosion resistance, high reliability in pressure systems, and superior brazing and welding characteristics. It is widely used in plumbing, HVAC, refrigeration, and medical gas pipeline applications.
Key Features
- UNS C12200 phosphorus-deoxidized copper (Cu-DHP)
- Excellent corrosion resistance in potable water systems
- Superior brazing and welding performance
- Good thermal and electrical conductivity
- High durability and pressure-handling capability
- Long service life with minimal maintenance
Equivalent Grades
| Standard | Equivalent Grade |
|---|---|
| ASTM / UNS | C12200 |
| EN | Cu-DHP |
| DIN | CW024A |
| JIS | C1220 |
| ISO | Cu-DHP |
Sizes
| Size Category | Range |
|---|---|
| Outside Diameter | 6 mm – 159 mm |
| Nominal Bore | 1/4” – 6” |
| Wall Thickness | Type K / Type L / Type M |
| Length Form | Straight Lengths, Coils, Cut Lengths |
ASTM B88 UNS C12200 Chemical Composition
| Element | Composition (%) |
|---|---|
| Copper (Cu) | ≥ 99.90 |
| Phosphorus (P) | 0.015 – 0.040 |
| Other Elements | ≤ 0.05 |
UNS C12200 Mechanical Properties
| Property | Value |
|---|---|
| Tensile Strength | 210 – 250 MPa |
| Yield Strength | 70 – 95 MPa |
| Elongation | ≥ 40% |
| Hardness | 40 – 85 HB |
UNS C12200 Physical Properties
| Property | Value |
|---|---|
| Density | 8.94 g/cm³ |
| Melting Point | ~1083°C |
| Thermal Conductivity | 330 – 340 W/m·K |
| Electrical Conductivity | ~85 – 90% IACS |
| Coefficient of Thermal Expansion | 16.5 µm/m·°C |
Types of UNS C12200 Copper Tube
- Type K Copper Tube (Heavy Wall)
- Type L Copper Tube (Medium Wall)
- Type M Copper Tube (Light Wall)
- Soft Annealed Copper Tube
- Hard Drawn Copper Tube
Applications
- Plumbing and potable water distribution systems
- HVAC and air-conditioning installations
- Refrigeration and condenser tubing
- Medical gas and oxygen pipelines
- Fire sprinkler and pressure piping systems
- Heat exchangers and industrial piping
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