What is TP1/C12000 copper?
C12000 copper alloy is the representative grade of phosphorus-deoxidized copper in the ASTM standards, forming a distinct category from pure oxygen-free coppers (C10100/C10200) and electrolytic tough pitch copper (C11000). This copper material, processed through phosphorus deoxidation, offers irreplaceable advantages in specific application fields.
Typical Chemical Composition of C12000:
Copper Content: Above 99.9%
Phosphorus Content: 0.004 - 0.012%
Residual Oxygen: ≤ 0.01%
Total Impurities: ≤ 0.1%
Key Physical Property Parameters:
Density: 8.89 g/cm³ (20°C)
Electrical Conductivity: 85-90% IACS (Annealed)
Thermal Conductivity: 340 W/(m·K)
Tensile Strength: 220-380 MPa
Elongation: ≥12% (Hard Temper) to ≥40% (Annealed)
Core Differences Compared to Oxygen-Free Copper Series:
Deoxidation Process: Utilizes the phosphorus deoxidation method (differentiates it from vacuum-melted oxygen-free copper).
Microstructure: Contains trace Cu₃P phases, improving hot workability.
Welding Characteristics: No risk of hydrogen embrittlement during welding, superior to regular electrolytic copper.
Cost Positioning: Falls between oxygen-free copper and regular electrolytic copper.
Hot Workability:
Hot rolling cracking susceptibility reduced by approximately 60% compared to regular electrolytic copper.
Suitable hot working temperature range expands to 650-850°C.
Hot rolling pass reduction can exceed 50%.
Welding Performance:
Excellent brazing properties, with fluidity improved by about 30% compared to regular copper.
Capable of various welding methods: oxyacetylene, arc, TIG, etc.
Particularly suitable for high-frequency induction brazing processes.
Corrosion Resistance Characteristics:
High-temperature oxidation resistance is better than oxygen-free copper (oxidation rate reduced by 25% at 800°C).
Significant improvement in resistance to stress corrosion cracking.
Good stability in sulfur-containing environments.
Typical Application Areas:
Heat Exchange Systems:
Condenser tubes for refrigeration equipment (wall thickness 0.3-1.2mm)
Core material for automotive radiators
Evaporator tubes for heat pump systems
Piping for solar thermal collectors
Building Water Supply Systems:
Potable water copper pipes (conforms to NSF/ANSI 61 standard)
Gas supply pipelines
Distribution pipes for underfloor heating systems
Piping for fire sprinkler systems
Specialized Industrial Applications:
Lining material for chemical equipment
Fermentation tanks for the brewing industry
Piping systems for pharmaceutical equipment
Heat exchanger tubes for seawater desalination plants
Key Processing Technical Points:
Cold Forming Processes:
Annealed hardness HV55-75, suitable for deep drawing (maximum drawing coefficient can reach 2.1).
Intermediate annealing temperature 450-600°C, holding time 1-2 hours per mm of thickness.
Welding Processes:
Recommended to use silver-bearing brazing filler metals (BAg-8 series).
Suggested shielding gas: 95% N₂ + 5% H₂ mixture.
For butt welding of tubes, a gap of 0.1-0.3mm is recommended.
Surface Treatment:
Chemical polishing can utilize phosphoric-nitric acid systems.
Passivation treatment is recommended with benzotriazole derivative solutions.
Acid pickling activation (e.g., 10% H₂SO₄ solution) is required before electroplating.
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Our product range
| Product Category | Key Product Forms | Common Standards (Examples) | Typical Applications / Features |
|---|---|---|---|
| Copper Rods & Bars | Round Rods, Square Bars, Hexagonal Bars | ASTM B187, C11000, C10200; EN 12163-66; JIS H3250 | Electrical conductors, machined parts, connectors, hardware. Available in various tempers (soft, hard). |
| Copper Tubes & Pipes | Seamless Tubes, Straight Lengths, Coils (for flexible tubes) | ASTM B75, B280, B88; EN 12735; JIS H3300 | Plumbing, HVAC/R, heat exchangers, medical gas lines, hydraulic systems. |
| Copper Plates & Sheets | Plates (>6mm thickness), Sheets (<6mm thickness) | ASTM B152, C11000; EN 1652; JIS H3100 | Architectural cladding, industrial fabrication, grounding plates, chemical processing. |
| Copper Strips & Foils | Strips, Rolls, Precision Foils | ASTM B272, C11000; EN 1652; JIS H3100 | Electrical contacts, transformers, shielding, gaskets, decorative inlays. |
| Copper Wires | Bare Copper Wire, Stranded Wire, Busbars | ASTM B1, B3, B187; EN 13601; JIS H3260 | Windings, cables, busbars, fasteners, welding electrodes. |
Our factory
We are a specialized manufacturer of premium copper products, including rods, tubes, plates, bars, wires, and strips. Our factory strictly adheres to international standards such as ASTM, EN, JIS, and GB, ensuring material compliance for global markets. Equipped with modern production lines-including continuous casting for rods, cold drawing machines for tubes, and precision rolling mills for strips-we maintain tight control over dimensions and tolerances. Every batch undergoes rigorous in-house testing using spectrometers for chemical composition, tensile testers for mechanical properties, and eddy current testers for defect detection. Our dedicated quality lab guarantees traceable, reliable products for electrical, automotive, and engineering applications worldwide.
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