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Size range and international standards of C10100 copper strip:
Size range
Thickness range:
Conventional cold-rolled strip: 0.3~12.0 mm.
Ultra-thin strip: can be customized to 0.005 mm (such as copper strip for photovoltaics).
Hot-rolled strip: some specifications can reach 4~150 mm, but the more common thickness in actual applications is 0.1~3.0 mm
Width range:
Standard width: ≤1000 mm, some applications (such as transformers) can be extended to 1250 mm.
Special customization: support slitting, flexible width range, such as 20~610 mm.
International Standards
General Purpose Standards:
ASTM B152-2009: covers general requirements for copper sheets and strips.
GB/T 2059-2017: Chinese national standard, applicable to copper and copper alloy strips (such as C10100, C10200).
Special Standards:
ASTM F68-2010: specifies electrical conductivity and other properties for oxygen-free copper processed materials for electronic devices.
GB/T 14594-2014: Standard for oxygen-free copper sheets and strips for vacuum devices, but does not cover high-temperature grain size and surface roughness.
Other Related Standards:
JIS H3130-2006: Japanese Industrial Standard, covering mechanical properties and dimensional tolerances of copper strips.
EN 1652: European standard, used for copper alloy sheath strips, with high dimensional tolerance requirements.
ASTM B193: specifies physical properties such as resistivity of copper strips.
Additional Notes
Dimensional flexibility: C10100 copper strip supports high customization, and thickness and width can be adjusted according to customer needs.
Performance differences: Special standards (such as ASTM F68) have stricter requirements on conductivity and purity, while general standards (such as GB/T 2059) focus on mechanical properties.
The chemical composition of C10100 oxygen-free copper varies slightly in different standards:
Core ingredients
Copper (Cu): ≥99.99% (most standards), some standards are ≥99.97% (Cu+Ag) or >99.95%.
Oxygen (O): usually ≤0.001% (10ppm), but some standards are relaxed to ≤0.03% or ≤0.002%.
Impurity elements (maximum content)
Lead (Pb): ≤0.001% (common), occasionally ≤0.003%.
Sulfur (S): ≤0.0018% or ≤0.004%.
Phosphorus (P): ≤0.0003% or ≤0.002%.
Zinc (Zn): ≤0.0001% or ≤0.003%.
Other elements (such as Ca, Hg, Se, Te, Bi, As, etc.): all ≤0.0001%~0.002%.
C10100 is a high-purity oxygen-free copper (OFHC) whose mechanical properties vary significantly depending on the material state (such as annealing, cold working, etc.).
1. Tensile strength and yield strength
Annealed state (O state): tensile strength ranges from 200-235 MPa, and yield strength ≥80 MPa.
Cold working state: With the increase of cold working degree, the strength increases significantly:
1/2 hard state (1/2H): tensile strength ≥250 MPa, yield strength ≥350 MPa.
Full hard state (H): tensile strength can reach 300-455 MPa, and yield strength can reach up to 400 MPa.
Extreme cold working (such as EH state): tensile strength can be further increased to 550 MPa (other alloy states may refer to similar trends).
2. Elongation
Annealed state: the elongation is the highest, up to 35%-55%.
After cold working: the elongation drops significantly, such as ≥15% in 1/2H state and ≥2% in full hard state (H). Some data mention that the minimum elongation is ≥8%, which may correspond to a medium degree of cold working.
3. Hardness
Vickers hardness (HV): annealed state is about 75-90 HV, full hard state (H) can reach 90-120 HV.
Rockwell hardness: Rockwell F hardness is 40-100, Rockwell 30T hardness is 27-70.
4. Elasticity and shear properties
Elastic modulus: tensile modulus is 115 GPa, shear modulus is 44 GPa.
Poisson's ratio: 0.31-0.34.
5. Other mechanical properties
Shear strength: 150-240 MPa.
Fatigue strength and impact toughness: After cold hardening, the impact strength is improved, but the specific values need to refer to experimental data.
Creep resistance: High-purity oxygen-free copper shows good creep resistance.
6. Effect of state on performance
Annealing treatment (500-700°C): restore ductility and reduce strength.
Cold working (such as rolling, drawing): significantly improve strength, but sacrifice ductility.
Recrystallization temperature: The recrystallization starting temperature after cold hardening is 200-300°C.
Processing performance:
Supports rolling, drawing, forging, deep drawing and complex forming (such as waveguides, cavity resonators).
Good weldability, can use a variety of welding techniques, and no risk of hydrogen embrittlement
Production process and product advantages of C10100 copper strip:
1. Production process
Raw material processing and melting and casting
Cathode copper, intermediate alloy, etc. are used as the main raw materials to form ingots through melting and casting.
Vertical semi-continuous casting technology is used to ensure the uniform composition of the ingots.
Hot rolling and cold rolling processing
The large ingots are heated and hot rolled to open the blanks, and then the surface oxide layer and defects are removed by milling.
The cold rolling process is carried out in multiple passes (such as intermediate rolling and finishing rolling), combined with intermediate annealing to refine the grains and adjust the mechanical properties.
Surface treatment and finishing
Degreasing and cleaning: Use alkaline degreasing liquid to remove grease, combined with rinsing and squeezing processes.
Tinning process: Some companies use hot-dip tinning technology to form a uniform coating through flux coating, tin layer bonding and cooling to improve corrosion resistance and welding performance.
Bending, straightening and shearing: ensure the dimensional accuracy and surface flatness of the strip.
Quality control standards
Following domestic and international standards such as ASTM B152M and GB/T 2059-2008, some companies also formulate stricter internal control indicators for high-temperature grain size and surface roughness.
2. Product Advantages
Excellent electrical and thermal conductivity
Purity is as high as 99.99% or more (oxygen-free copper C10100), oxygen content is less than 5ppm, and conductivity is second only to silver, suitable for high-precision fields such as semiconductors and new energy.
Excellent corrosion resistance
It shows good corrosion resistance in fresh water, sea water and industrial environments, especially suitable for ship equipment and chemical applications.
High processing adaptability
Excellent cold and hot processing performance, can easily carry out cutting, stamping, welding and other forming processes to meet the needs of complex structural parts.
Stable mechanical properties
High tensile strength (up to 250-300MPa or more), good elongation (≥30%), moderate hardness, suitable for high-strength connectors and busbars and other scenes.
Surface treatment diversity
Provide polishing, mirror, tin plating and other treatment methods, some companies have environmentally friendly tin plating technology, which can replace imported products.
Wide application fields
Covering high-end fields such as new energy vehicle connectors, chip heat dissipation cover plates, power busbars, vacuum sealing parts, etc., to achieve import substitution.
3. Technology upgrade direction
Through innovative processes such as two-stage continuous production and acid purification, energy consumption is reduced and the yield rate is improved
In addition, wide copper strips (width up to 2500mm) and customized specifications (thickness 0.01-30mm) further expand the application scenarios
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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