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Detailed size range
Diameter range:
Depending on different application requirements, the diameter range of C26000 copper wire is relatively wide. For example:
Copper wire for semiconductor bonding: The diameter range is 18 microns to 50 microns (can be expanded to more than 50 microns), and the specific models are distinguished by the "HC" series.
Industrial copper wire: Common specifications include diameters of 0.5mm, 1.2mm, 1.5mm, etc., which can be customized according to requirements.
Conductor diameter: In specific wiring harness applications, the actual core conductor diameter can reach 0.52±0.02mm (in accordance with GB/T 3953-2009 standard).
Other size parameters:
For strip form (some parameters can refer to copper wire processing): thickness range 0.01-2.0mm, width 2-600mm, hardness grades include soft (O), semi-hard (1/2H), hard (H), etc.
International Standards
The international standards for C26000 copper wire cover multiple systems, including:
American Standards:
ASTM B36: Standardizes the mechanical properties and chemical composition of cold-drawn bars, wires and profiles of brass (C26000).
ASTM B134: General standard for brass wire (such as the retaining ring parts mentioned in
).
ASTM F468: Standards involving non-ferrous metal bolts and screws, indirectly reflecting the processing performance of C26000.
International Organization for Standardization (ISO):
The corresponding grade is CuZn30, which is classified in the copper-zinc alloy system of ISO standards.
European Standards:
DIN EN 1652: The corresponding grade is CW505L (the original DIN standard is CuZn30).
EN 12164: Standardizes the chemical composition and mechanical properties of copper-zinc alloy processing materials.
Chinese Standards:
GB/T 2059-2000: specifies the chemical composition and performance requirements of C26000 brass strip, and some parameters can be extended to copper wire applications.
GB/T 3953-2009: specifies the conductor diameter and elongation requirements for soft round copper wire (such as wire harness applications in).
C26000 is a copper-zinc binary alloy (ordinary brass), the main components are:
Copper (Cu): 68.5%~71.5%
Zinc (Zn): Balance (about 28.5%~31.5%)
Impurity elements (total ≤0.3%):
Lead (Pb) ≤0.03%~0.07%
Iron (Fe) ≤0.05%~0.10%
Bismuth (Bi) ≤0.002%
Other trace elements such as phosphorus (P) and beryllium (Sb) are extremely low in content.
Mechanical properties vary significantly depending on the material state (annealing, cold working, etc.):
1. Annealed state (soft state)
Tensile strength (σb): 330-372 MPa or 340-460 MPa
Yield strength (σ₀.₂): 110-158 MPa or 70-230 MPa
Elongation (δ): ≥25% (some data show that it can reach 54-66%)
Hardness (HV): 85-145 or Rockwell B hardness 53-93
2. Cold work hardening state (such as H08 superhard state)
Tensile strength (σb): up to 830 MPa or 890 MPa
Yield strength (σ₀.₂): 450 MPa
Elongation (δ): as low as 3%
Other parameters
Elastic modulus (E): 110 GPa
Poisson's ratio: 0.31～0.34
Shear strength: 220～390 MPa
Key performance characteristics
Processing performance:
Excellent cold and hot processing performance, suitable for complex forming such as deep drawing and molding.
Contains a small amount of lead (0.03-0.07%) to improve machinability and reduce tool wear.
Corrosion resistance:
Stable in general atmosphere, fresh water and sea water, but prone to stress corrosion cracking, annealing treatment is required to eliminate internal stress.
Easy to oxidize and dezincify at high temperature, and protective atmosphere processing is required.
Physical properties:
Density: 8.53 g/cm³
Melting point: 899～955°C
Electrical conductivity: 28%～37% IACS (about 1/3 of pure copper)
Thermal conductivity: 120～138 W/(m·K)
Production process and product advantages of C26000 copper wire:
1. Production process
Raw material pretreatment
The electrolytic copper plate is preheated (80-150℃) to remove surface moisture, followed by cleaning steps such as shelling and pickling (electrolytic pickling and cold water washing) to ensure the cleanliness of the copper surface.
2. Wire drawing and forming
The copper rod is gradually drawn into copper wire of the required diameter through rough drawing and wire drawing in water tanks.
Boron coating may be performed during the wire drawing process to improve lubricity.
Twisting process
Multiple strands of copper wire are integrated into bundles through bundle twisting, pair twisting and single twisting processes to enhance structural stability and conductive uniformity.
4. Surface treatment
Tinning: The copper wire is hot-dip tinned after being wiped with flux to improve corrosion resistance and welding performance.
Braiding and sheath extrusion: Some products need to go through the braiding process, and then the sheath is extruded to cover the insulation layer to form a finished product.
Heat treatment
Adopt annealing (520-650℃), low temperature annealing (260-270℃) and other processes to optimize material properties, eliminate internal stress and improve ductility.
Inspection and packaging
The finished product must pass mechanical properties, conductivity and other tests, and be packaged and stored after passing.
2. Product advantages
Excellent mechanical properties
High strength and plasticity: tensile strength reaches 340-460 MPa, elongation ≥25%, with both toughness and load-bearing capacity.
Adjustable hardness: different hardness levels (O, H, EH, etc.) can be achieved through annealing or cold working to meet diverse needs.
Excellent processing performance
Excellent cutting performance: trace lead elements reduce tool wear, suitable for automatic lathes and CNC machining of high-precision parts.
Strong adaptability to hot and cold processing: supports deep stamping, rolling, extrusion and other processes, and is widely used in the manufacture of complex parts.
Outstanding electrical and thermal conductivity
The electrical conductivity is 34% IACS and the thermal conductivity is 138 W/(m·K), which is suitable for electronic components, radiators and high conductivity demand scenarios.
Corrosion resistance
It is stable to general environmental corrosion, but attention should be paid to dezincification and corrosion cracking in sulfur-containing or high-temperature environments. The surface quality can be improved by controlled atmosphere heat treatment.
Wide application areas
Automotive industry: radiator housing, cartridge case, sensor, etc.
Electronic and electrical: connectors, switches, cable connectors.
Industrial machinery: wear-resistant gears, slide rails, springs.
Medical equipment: corrosion-resistant parts.
Environmental protection and sustainable development
The production process gradually adopts renewable energy and recycling technology, which is in line with the trend of green manufacturing.
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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