Ningbo Jintian Copper (Group) Co., Ltd.
Ningbo Jintian Copper (Group) Co., Ltd.
Copper

TP2 Copper

Copper

Designation and Standards

International Common Grades:

  • China: TP2 (GB/T 1527-2017, GB/T 1528-2019)

  • America: C12200 (ASTM B88)

  • Japan: C1220 (JIS H3300)

  • European Union: CW024A (EN 1172)

  • International Standard: ISO 1337


Product Features

  • Deoxidized Copper Characteristics: Contains trace phosphorus (0.015-0.040%), strong deoxidation ability, and excellent welding performance.

  • Corrosion Resistance: Resistant to high-temperature oxidation and steam corrosion, suitable for condensers, heat exchangers, and other humid/high-temperature environments.

  • Workability:

    Good cold working properties, can be made into thin-walled tubes or complex shapes.

    For hot working, temperature control is required (annealing temperature: 500-600°C) to avoid grain coarsening.

  • Conductivity: Slightly lower than T2 copper (electrical conductivity ≥ 90% IACS), but meets general power transmission needs.


Common Product Forms and Dimensions

Product Form

Dimension Range

Applicable Standard

Tube

Outer Diameter: 5-219mm, Wall Thickness: 0.5-10mm

GB/T 1527-2017

Bar

Diameter: 10-150mm

GB/T 1528-2019

Plate/Strip

Thickness: 0.5-50mm, Width ≤1000mm

GB/T 2059-2017

Wire

Diameter: 0.5-20mm

GB/T 14953-2017

Irregular shape

Custom dimensions based on customer drawings

Agreement Technical Conditions

Note: Tubes are the main form and are widely used in refrigeration and heat exchange fields.


Chemical Composition (GB/T 1527-2017)

Component

Cu+Ag

Pb

Sb

Bi

P

Fe

S

Other Impurities

Content (%)

≥99.90

≤0.005

≤0.005

≤0.001

0.015-0.040

≤0.05

≤0.005

≤0.1


Physical Properties

Property

Value

Density

8.89-8.94 g/cm³

Conductivity

90-93% IACS

Resistivity

0.0184-0.0190 μΩ·m

Thermal Conductivity

350-370 W/(m·K)

Thermal Expansion Coefficient

17.5×10⁻⁶/K

Melting Point

1083°C


Mechanical Properties (Reference GB/T 1527-2017)

State

Tensile Strength (MPa)

Elongation (%)

Vickers Hardness (HV)

Hard (Y)

≥275

≥15

80-110

Annealed(M)

≥200

≥45

50-70

Note: Annealed tube is mainly used for bending and forming, while hard tube is suitable for pressure-bearing applications.


Core Advantages

  • Hydrogen Embrittlement Resistance: Phosphorus elements inhibit hydrogen penetration, reducing the risk of hydrogen embrittlement.

  • Welding Performance: Suitable for flame welding, induction welding, and other high-precision welding processes.

  • High-Temperature Oxidation Resistance: Long-term operating temperature up to 200°C (short-term up to 300°C).


Product Applications

  • Refrigeration Industry: Air conditioning copper tubes, refrigerator condenser tubes, refrigerant transport tubes.

  • Heat Exchange Systems: Boiler heat exchange tubes, seawater desalination equipment.

  • Building Piping: Hot and cold water pipes, gas transport pipes.

  • Electrical Equipment: Medium and low-voltage cable conductors, busbars.


Processing Notes

  • Welding Process: Prefer phosphorus-containing solder (e.g., BCuP series), avoid oxidation.

  • Annealing Control: Soft material annealing temperature ≤ 600°C, and hard material should avoid repeated annealing.

  • Surface Treatment: After acid pickling, thoroughly rinse to prevent residual phosphides from causing corrosion.


Frequently Asked Questions

Q: What is the main difference between TP2 and T2 copper?

A: TP2 contains phosphorus (0.015-0.04%), offering better welding properties but slightly lower conductivity. T2 has higher purity but is more prone to hydrogen embrittlement.


Q: Can TP2 copper tubes be used in drinking water systems?

A: They can be used if they comply with the GB/T 18033-2017 standard but must pass migration testing for lead, arsenic, and other elements.


Q: What happens if the phosphorus content exceeds the standard?

A: Conductivity significantly decreases, and it becomes prone to cracking during cold working, so it must be strictly controlled below 0.04%.


Standards Reference

  • Tubes: GB/T 1527-2017, ASTM B88

  • Bars: GB/T 1528-2019, JIS H3300

  • Welding Standards: GB/T 985.1-2008


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