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Detailed size range
Thickness range:
The standard thickness of copper strip is 0.035-2.5mm (some data show that it can be expanded to 5.0mm), and common specifications are concentrated between 0.05-2.0mm.
The thickness of copper coil is consistent with that of copper strip, but ultra-thin or thicker specifications (such as 0.1-3.0mm) can be customized according to needs.
2. Width range:
The width of copper strip is usually 7-610mm, and some standards cover narrower (3mm) or wider (1250mm) specifications.
The width of copper coil is similar to that of copper strip, and ultra-narrow or ultra-wide sizes can be customized for special applications.
Other parameters:
The inner diameter of copper coil is usually 80-500mm, and the weight of a single coil can reach 14kg/mm.
The length can be customized according to needs, and the common length is 1-100 meters.
International standards
The international standards corresponding to C26800 include:
ASTM: B36 (plate), B587 (tube).
JIS: C2680.
ISO: CuZn34 (CW506L).
EN: CW506L.
Chinese standards: GB/T 5231-2012 (chemical composition), GB/T 2040-2017 (sheet).
In addition, the material has passed SGS certification and complies with regional standards such as DIN and EN. Its mechanical properties (such as tensile strength, hardness) and conductivity (higher conductivity in soft state) need to be determined according to the specific processing state (such as soft state, semi-hard state, full hard state).
Chemical composition (mass percentage):
Copper (Cu): 64.0%~68.5%
Zinc (Zn): Balance (about 31%~36%)
Lead (Pb): ≤0.15% (some standards such as ASTM stipulate ≤0.09%)
Iron (Fe): ≤0.05%
Other elements: such as boron (B) ≤0.01%, bismuth (Bi) ≤0.002%, etc., total impurity ≤0.45%
Mechanical properties vary significantly with processing conditions (such as annealing, cold working), and common conditions include H00 (soft state) to H10 (full hard state). Take the typical state as an example:
Annealed state (OS035):
Tensile strength: 345 MPa (50 ksi)
Elongation: 60%
Shear strength: 234 MPa (34 ksi)
Semi-hard state (H02):
Tensile strength: 607 MPa (88 ksi)
Elongation: 15%
Full hard state (H04):
Tensile strength: 758 MPa (110 ksi) or 510 MPa (74 ksi) (different test standards or data sources)
Elongation: 8%
Yield strength: 420 MPa (60 ksi)
Brinell hardness: 80 HB
Other conditions (H08):
Tensile strength: 883 MPa (128 ksi)
Elongation: 3%
Physical properties:
Melting point: liquidus 930°C (1710°F), solidus 904°C (1660°F)
Density: 8.1~8.47 g/cm³
Electrical conductivity: 27% IACS (International Annealed Copper Standard)
Thermal conductivity: 116~120 W/m·K
Coefficient of thermal expansion: 20~20.3 µm/m·°C (70~572°F)
Application and processing characteristics:
Corrosion resistance: good, but avoid contact with ammonia, mercury or acidic media to prevent stress corrosion or dezincification.
Processing performance:
Excellent cold working ability, suitable for stamping, drawing and other processes.
Poor hot forming ability, recommended annealing temperature 540~600°C (annealed state) or 800~1300°F (stress relief after cold working).
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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