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Size range and international standards of C10200 copper tube:
Size range
Round tube
Outer diameter: 2mm to 914mm (some standards such as ASTM B188 can reach 36 inches/910mm)
Wall thickness: 0.2mm to 120mm
Length: Standard lengths include 3m, 5.8m, 6m, 11.8m, 12m, and customization is supported
Square tube
Size: 2mm×2mm to 1016mm×1016mm
Wall thickness: 0.2mm to 120mm
Rectangular tube
Size: 2mm×4mm to 1016mm×1219mm
Wall thickness: 0.2mm to 120mm (some specifications can be extended to 910mm)
Special application specifications
Copper tubes with an outer diameter of 1/4 inch (6.35mm) and 1/2 inch (12.7mm) are commonly used in air conditioning and refrigeration.
International Standards
C10200 copper tubes comply with the following major international standards:
ASTM series
ASTM B75: General standard for seamless copper tubes, covering round, square and rectangular tubes.
ASTM B280: Standard for copper tubes for air conditioning and refrigeration.
ASTM B188: Standard for large diameter copper tubes (such as 1/8 inch to 8 inch outer diameter).
ASTM B68: Standard for cold drawn copper tubes.
European Standards
EN 12735: Applicable to refrigeration and air conditioning systems.
DIN 1754/8905: Standard for materials and processes for copper tubes.
Asian Standards
JIS H3300 (Japanese Industrial Standard).
GB/T (Chinese National Standard): such as GB/T 5231-2012, GB/T 1527-2006.
Other Standards
ISO: General International Organization for Standardization standard.
AS1571 (Australian Standard).
Key features and applicability
Material: C10200 is oxygen-free high-conductivity copper (OFHC), with a purity of up to 99.95%, excellent electrical and thermal conductivity, and strong resistance to hydrogen embrittlement.
Application: Widely used in air conditioners, refrigerators, heat exchangers, seawater desalination, petrochemicals and precision instruments.
Processing: Supports cold drawing, annealing, bending, welding and other processes, and the surface can be polished, brushed or sandblasted.
Main ingredients:
Copper (Cu) content: ≥99.95% (oxygen-free copper No. 2) to ≥99.97% (oxygen-free copper No. 1), total impurity content ≤0.03%-0.05%.
Oxygen (O) content: generally ≤0.003% (30 ppm), ≤0.001% (such as vacuum application scenarios).
Impurity restrictions:
Lead (Pb) ≤0.004%, iron (Fe) ≤0.004%, sulfur (S) ≤0.004%, zinc (Zn) ≤0.003%, others such as bismuth (Bi), antimony (Sb), arsenic (As), nickel (Ni), etc. are all subject to restrictions.
Mechanical properties vary significantly depending on the material state (annealed, hard, etc.):
Tensile strength:
Soft state (annealed): 215-275 MPa (≈31.8-40 ksi).
Hard state (cold worked): 261-441 MPa (≈38-64 ksi), up to 462 MPa (67 ksi).
Yield strength:
Soft state: 49-78 MPa (≈7-11 ksi).
Hard state: 290-400 MPa (≈42-58 ksi).
3. Elongation:
Soft state: 35-55% (excellent plasticity after annealing).
Hard state: 10-15% (plasticity decreases after cold working).
4. Hardness:
Brinell hardness (HB): 35-45 HB in soft state, 85-95 HB in hard state.
Rockwell hardness: HRB 40 (soft), HRB 57-100 (hard).
Other properties:
Density: 8.90-8.94 g/cm³.
Modulus of elasticity: 115-120 GPa.
Shear strength: 150-240 MPa.
Thermal and electrical properties
Thermal conductivity: 383-391 W/(m·K) (20℃), equivalent to 100% IACS conductivity.
Melting point: 1080-1083℃.
Thermal expansion coefficient: 17.0-17.7 µm/m·℃ (20-300℃).
Annealing temperature: 375-650℃, hot working temperature: 750-875℃.
Production process and product advantages of C10200 copper pipe:
1. Production process
Material selection
C10200 is oxygen-free copper (Oxygen-Free Copper), with a purity of up to 99.95%, an oxygen content of ≤0.03%, and a total impurity content of ≤0.05%. Its chemical composition strictly complies with international standards such as ASTM B75 to ensure high conductivity and resistance to hydrogen embrittlement.
Processing technology
Hot processing and cold processing: Preliminary forming through hot processing processes such as hot rolling and hot extrusion, and then the wall thickness and outer diameter of the pipe are accurately controlled by cold drawing (cold drawing) process (range: wall thickness 0.2mm~120mm, outer diameter 2mm~910mm).
Seamless pipe manufacturing: Seamless copper pipes are produced by pressing or drawing technology to ensure structural uniformity and density.
Annealing treatment: The annealing temperature range is 375-650℃ to eliminate work hardening and improve ductility and welding performance.
Surface treatment
The surface of the pipe can be polished, mirrored or sandblasted to meet the appearance and corrosion resistance requirements of different application scenarios.
Quality control
During the production process, it is necessary to pass multiple tests such as tensile strength test (tensile strength ≥ 275MPa), Rockwell hardness test (HBS35-95), hydrogen embrittlement test and chemical composition analysis to ensure compliance with ASTM, GB/T and other standards.
2. Product advantages
High electrical and thermal conductivity
The conductivity of C10200 copper is ≥ 100% IACS, and the thermal conductivity is 391W/(m·℃), which is suitable for high-power electrical equipment (such as microwave tubes, vacuum switches) and high-efficiency heat dissipation systems.
Excellent processing performance
It has both cold and hot processing adaptability and can be made into complex shapes through stamping, forging, drawing and other processes.
Outstanding welding performance, supports TIG welding, MIG welding and gas shielded welding, and the joint strength is high and the airtightness is good.
Corrosion and hydrogen embrittlement resistance
The oxygen-free property avoids the risk of hydrogen embrittlement, and forms a stable oxide film (patina) on the surface in a humid or high temperature environment, significantly extending the service life.
Wide range of applications
Construction: Water heating, heating and cooling pipes in residential and commercial buildings, pressure-resistant and environmentally friendly.
Industrial: LPG pipelines, medical gas delivery pipes, vacuum sealing devices and shipbuilding.
Electronic and electrical: electric vacuum devices (such as magnetrons, traveling wave tubes), coaxial cables and waveguide components.
Standardization and customization
The products comply with international standards such as ASTM B88, EN1057, JIS H3300, and support customized sizes (up to 12 meters in length) and surface treatment to meet diverse needs.
Q1:Do you provide samples? Is it free or extra?
A1:Yes, we can provide samples free of charge and the customer will pay the freight.
Q2:What if I don't have export experience ?
A2:We have reliable forwarder agent which can ship items to you by sea/air/Express to your doorstep. Any way, we will help you choose the most suitable shipping service.
Q3:How long is your lead time?
A3:If it is in stock, it is usually 5-10 days. Or, if there is no inventory, 15 days, depending on the quantity.
Q4:What are your terms of payment?
A4:30% T/T deposit in advance, 70% T/T balance within 5 days after B/L copy, 100%.Irrevocable L/C at sight, 100% Irrevocable L/C after receive B/L 30-120 days, O/A.
Q5:How is your technical support?
A5:We provide lifetime online support through Whatsapp/ Skype/ Wechat/ Email. Any problem after delivery, we will offer you call anytime.
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