Material Overview and Standard System
C12200 (also known as TP2 or DHP copper) is a phosphorus-deoxidized high-purity copper alloy. By adding trace amounts of phosphorus (0.013%–0.050%), it achieves deep deoxidation, completely eliminating the risk of hydrogen disease associated with traditional copper materials (no cracking in reducing atmospheres). Its internationally recognized grades include:
ASTM Standard: C12200 (American Standard)
JIS Standard: C1220 (Japanese Standard)
GB Standard: TP2 (National Standard)
This material, with its high purity (Cu+Ag≥99.85%), combines excellent thermal conductivity, weldability, and corrosion resistance. It is primarily supplied in tubes (accounting for over 70% of applications), followed by plates, strips, rods, and wires.
Core performance characteristics
(1) Physical properties
Electrical conductivity: 85–92% IACS (the increase in phosphorus content results in slightly lower electrical conductivity than pure copper);
Thermal conductivity: 340–375 W/(m·K), suitable for heat exchange systems;
Coefficient of thermal expansion: 17.2×10⁻⁶/℃ (20–300℃), compatible with most metals;
Density: 8.94 g/cm³, close to pure copper.
(2) Special performance advantages
No tendency to hydrogen disease: Blocking the diffusion of hydrogen atoms through phosphorus deoxidation, passing the ASTM B154 mercurous nitrate test;
Excellent welding performance: Brazing wetted area is 25% higher than pure copper (C11000), compatible with laser welding and high-frequency induction welding;
Corrosion resistance: Resistant to air, fresh water and non-oxidizing media, but acidic environments (such as those containing ammonia and chlorides) must be avoided.
Application fields and typical cases
(1) Heat exchange system
HVAC: refrigeration seamless copper tube (compliant with EN 12735), accounting for 40% of global supply;
New energy equipment: photovoltaic inverter liquid cooling pipes, fuel cell bipolar plates (thermal conductivity ≥ 340 W/(m·K));
Chemical equipment: sulfuric acid cooler coils (resistant to non-oxidizing acid corrosion).
(2) Building and energy pipelines
Water supply system: drinking water pipes (pass NSF/ANSI 61 sanitary standards);
Gas transmission: high-pressure gas pipes (ASME B16.22 flange connection certification);
Capillary network heating: radiant heating system (annual growth rate of 25%, green building LEED certification).
(3) Transportation and electronics industry
Automotive parts: brake oil pipes, radiators, electronic connectors (high bending fatigue resistance);
Shipbuilding: seawater desalination device heat transfer pipes (seawater corrosion resistance);
Electrical components: relay springs, lead frames (conductivity 80% IACS balanced strength).
why choose us
Professional copper pipe supplier
As a professional enterprise dedicated to global copper product trade since 2008, GNEE Metal Group deeply recognizes the quality and responsibility embodied in the ASTM B111 standard. This standard not only specifies chemical composition and mechanical properties but also represents a comprehensive quality commitment spanning manufacturing processes to testing and verification. GNEE solemnly assures global customers that every ASTM B111-standard condenser tube and copper alloy tubing we supply will strictly adhere to its requirements for seamless manufacturing, annealing treatment, eddy current testing, and various mechanical performance tests.
Contact us today for a quotation：sales@gneesteel.com
