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The size range of C26000 copper strip/roll varies according to the standard, and the main parameters are as follows:
Thickness:
Common range: 0.01~3.0mm, specific tolerances are based on standard requirements. For example:
In the Chinese national standard (GB/T 2059), the thickness is 0.01~2.0mm.
Under the ASTM standard, the thickness is 0.05~2.0mm.
Can be customized to 0.03~3.0mm.
Width:
Typical range: 2~1200mm, specifically adjusted according to the purpose:
3~300mm is commonly used in the electronics industry, while 200~1250mm can be reached in the transformer or cable field.
3. Length and roll diameter:
The length can be customized (1~100 meters), and the inner diameter of the roll is usually 80~500mm.
International Standards
The production and inspection of C26000 copper strip/roll follows the standards of many countries, mainly including:
Chinese Standards:
GB/T 2059-2008: specifies chemical composition, mechanical properties (such as tensile strength 340~460MPa), dimensional tolerances and inspection methods, and refers to JIS and European standards.
American Standards:
ASTM B152: covers thickness and width tolerances, tensile strength (semi-hard state ≥340MPa), etc.
ASTM B36M/B134M: General technical requirements for brass strip.
European Standards:
BS EN 13599: specifies conductivity (such as 100% IACS) and mechanical properties, suitable for power equipment such as transformers.
DIN/EN Standards: such as CuZn30 (corresponding to C26000), specifying material and processing conditions.
Other standards:
JIS H3100/H3110 (Japanese Industrial Standard) and customized requirements (such as OEM size).
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 strip and copper coil:
1. Production process
Continuous extrusion method
Using Φ20 copper rod through continuous extrusion deformation, combined with circulating water cooling to generate billets, it has the characteristics of high efficiency and energy saving, high yield rate and short production cycle, especially suitable for the production of copper strips for high-performance new energy vehicle power batteries.
Horizontal continuous casting-cold rolling short process
Including smelting (including rare earth refining agent to purify the melt), horizontal continuous casting strip billet, milling, rough rolling, multi-pass annealing and finishing rolling, surface treatment and other steps, significantly improving the product thickness accuracy (±0.002mm) and surface finish (Ra≤0.15μm), suitable for high-precision electronic copper strips.
Sintering and rolling combined process
The process includes unwinding → leveling → copper powder addition → multiple sintering and rolling → winding. High-temperature sintering enhances the material density, and rolling optimizes the mechanical properties. It is suitable for the production of wear-resistant and high-conductivity copper strips.
4. Annealing and cold rolling control
In large-scale production, by adjusting the annealing temperature (such as 260~650℃) and the total cold rolling processing rate (such as 60%~85%), the strength and plasticity of the material are balanced to ensure grain refinement and stable performance.
2. Product advantages
Excellent mechanical properties
Tensile strength 340~460MPa, elongation ≥25%, hardness 85~145HV, with high strength and good plasticity, suitable for complex processing such as deep drawing and bending.
Excellent electrical and thermal conductivity
Electrical conductivity ≥45%IACS, excellent thermal conductivity, widely used in electronic connectors, heat dissipation components and high-speed transmission equipment to meet the needs of high-frequency signal transmission.
Corrosion resistance and wear resistance
Stable in general corrosive environments (pay attention to the risk of dezincification corrosion), excellent wear resistance, suitable for marine engineering, chemical equipment and automotive parts.
Wide processing adaptability
Supports a variety of processing methods such as stamping, welding, cutting, stretching, etc., and achieves efficient continuous stamping through precision slitting technology (such as MULTICOIL® stacked coils) to reduce mold loss.
Wide application areas
Covering high-tech fields such as electronic components (connectors, conductive parts), heat exchangers, aerospace components, decorative parts and new energy vehicle batteries, meeting diverse market 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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