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Detailed size range:
Thickness range: The thickness of C51900 copper strip is usually between 0.08 and 1.5 mm, and some specifications can even reach 0.01 to 2.0 mm.
Width range: The width range varies from 12 mm to 640 mm, depending on the application requirements.
Length range: The length is usually 600 meters or longer, and the specific length is customized according to customer requirements.
International standards:
C51900 copper strip complies with the following international standards:
American Standard (ASTM): ASTM B103/B103M-2015.
European Standard (EN): EN CuSn6.
Japanese Standard (JIS): JIS C5191.
Chinese National Standard (GB): GB/T 5231 specifies the chemical composition and dimensional tolerance requirements of C51900 copper strip.
Chemical composition
Main components:
Copper (Cu): Balance (usually about 89%-91%).
Tin (Sn): 6.0%-7.0%
Phosphorus (P): There are two common ranges:
0.10%-0.25% (ASTM, GB/T standards)
0.03%-0.35% (some international standards such as EN, JIS).
Impurity limits: Lead (Pb) ≤0.02%, Iron (Fe) ≤0.05%, Aluminum (Al) ≤0.002%, others such as silicon, antimony, bismuth, etc. are ≤0.002%, total impurity amount ≤0.1%.
Mechanical properties
Basic performance range (differences in different states):
Tensile strength (σb):
Annealed state: 350-450 MPa;
Cold worked state (hard state): 380-620 MPa (up to 629 MPa);
Some standards require ≥470 MPa (such as bars).
Yield strength (σs):
Annealed state: 200-250 MPa;
Cold worked state: 390-570 MPa.
Elongation (δ5):
Annealed state: 13%-29%;
Hard state: more than 14%.
Elastic modulus: 110 GPa (tensile), some data is 16 GPa (possible unit differences need to be verified).
Other key properties:
Hardness: Rockwell B hardness 42-91, surface hardness 45-76 (30T scale).
Wear resistance: Due to the presence of tin and phosphorus, it has excellent wear resistance and is suitable for bearings, gears, etc.
Fatigue strength: high fatigue resistance, suitable for elastic components.
III. Physical and thermal properties
Density: 8.65-8.80 g/cm³.
Thermal conductivity: 38-54.4 W/m·K.
Coefficient of thermal expansion: 18 µm/m·K or 18.5×10⁻⁶/°C (20-300°C).
Melting point: solidus 930°C, liquidus 1040°C.
Electrical conductivity: 14%-15.5% IACS (may decrease after cold working).
Production process and product advantages of C51900 copper strip and copper coil:
I. Production process
1. Raw material preparation
The main component of C51900 copper strip is tin bronze, and its chemical composition includes copper (Cu), tin (Sn), lead (Pb), etc., of which the tin content is 6.0%~7.0% and the lead content is 0.10%~0.25%. Raw materials such as electrolytic copper plates and scrap copper plates need to be prepared before production.
Smelting and casting
Using electromagnetic casting technology, the actual casting temperature is 1150℃, and the billet is continuously cast by the upward method. This method can improve production efficiency and reduce energy consumption.
2. Processing technology
Continuous casting and rolling method: The cast billet is horizontally cast, and the pull-stop-push process is adopted. The pulling speed can reach 180mm/s to ensure that the surface of the strip is smooth and without scars.
Cold rolling and annealing: Through multiple cold rolling and annealing treatments, the material thickness is gradually reduced and the mechanical properties are improved.
3. Surface treatment: Bright annealing, milling and other processes are used to further improve the surface quality.
4. Forming and winding
The final product is rolled into a copper coil or copper strip after cold rolling with automatic thickness control. The finished product has high precision, high conductivity and good surface finish.
2. Product advantages
Excellent mechanical properties
C51900 copper strip has high strength, high elasticity, wear resistance and anti-magnetism, and is suitable for manufacturing high-strength elastic parts.
Good corrosion resistance
It shows good corrosion resistance in the atmosphere and fresh water, and is suitable for water supply equipment in engineering buildings.
Excellent processing performance
It has good cold processing and welding properties, can be cut, and is suitable for springs and conductive parts in precision instruments.
Energy saving and consumption reduction
The continuous extrusion and drawing technology is used in the production process, which simplifies the production process, reduces energy consumption by about 30%-40%, and reduces pollution sources.
Wide range of application areas
C51900 copper strip is widely used in new energy vehicle power batteries, aerospace, electric power, petrochemical and other industries. In addition, it is also used to manufacture springs, contact pieces, wear-resistant parts, etc.
Strong market competitiveness
The product specifications are diverse, meeting the needs of different customers, and have high market recognition and competitiveness.
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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