Description
GB/T 18033 TP1 TP2 TU1 TU2 TU3 Seamless Copper Tubes
Material
The GB/T 18033 standard specifies the requirements for seamless copper tubes used in various applications. These tubes are primarily made from high-purity copper, which ensures excellent electrical and thermal conductivity.
Specification
The seamless copper tubes under this standard are categorized into different types based on their intended use and mechanical properties. The main types include TP1, TP2, TU1, TU2, and TU3, each with specific characteristics and applications.
Key Features
- High Conductivity: Excellent electrical and thermal conductivity.
- Corrosion Resistance: Good resistance to corrosion in various environments.
- Formability: Easy to form and fabricate into various shapes.
- Durability: High mechanical strength and durability for long-term use.
Chemical Composition
| Grade | Copper (Cu) | Lead (Pb) | Iron (Fe) | Nickel (Ni) | Other Elements |
|---|---|---|---|---|---|
| TP1 | ≥ 99.90% | ≤ 0.005% | ≤ 0.05% | ≤ 0.05% | – |
| TP2 | ≥ 99.80% | ≤ 0.005% | ≤ 0.05% | ≤ 0.05% | – |
| TU1 | ≥ 99.90% | ≤ 0.005% | ≤ 0.05% | ≤ 0.05% | – |
| TU2 | ≥ 99.80% | ≤ 0.005% | ≤ 0.05% | ≤ 0.05% | – |
| TU3 | ≥ 99.70% | ≤ 0.005% | ≤ 0.05% | ≤ 0.05% | – |
Mechanical Properties
| Property | TP1 | TP2 | TU1 | TU2 | TU3 |
|---|---|---|---|---|---|
| Tensile Strength | ≥ 210 MPa | ≥ 200 MPa | ≥ 210 MPa | ≥ 200 MPa | ≥ 190 MPa |
| Yield Strength | ≥ 70 MPa | ≥ 65 MPa | ≥ 70 MPa | ≥ 65 MPa | ≥ 60 MPa |
| Elongation | ≥ 30% | ≥ 30% | ≥ 30% | ≥ 30% | ≥ 30% |
| Hardness | ≤ 80 HRB | ≤ 80 HRB | ≤ 80 HRB | ≤ 80 HRB | ≤ 80 HRB |
Steel Grade
The seamless copper tubes are categorized under specific grades based on their chemical composition and mechanical properties. The primary grades include TP1, TP2, TU1, TU2, and TU3, which are suitable for different applications.
Application
Seamless copper tubes are widely used in various industries, including:
- Electrical Engineering: For wiring and electrical components due to their high conductivity.
- Plumbing: In plumbing systems for water supply and heating.
- HVAC: In heating, ventilation, and air conditioning systems.
- Automotive: In automotive applications for cooling systems and heat exchangers.
Possible Alternative Grades
In addition to the GB/T 18033 grades, other alternative grades may be considered based on specific requirements:
- C11000: A common copper grade with similar properties.
- C10200: Offers higher conductivity and is used in specialized applications.
- C12000: Known for its excellent forming capabilities.
