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Size range of C51900 copper tube:
Outer diameter range: usually from smaller specifications (such as Φ10mm) to larger specifications (such as Φ300mm), length range is 2 meters to 6 meters.
Wall thickness range: seamless tubes and welded tubes can be customized according to customer needs
In terms of international standards, C51900 copper tubes comply with the following international specifications:
American standard: ASTM C51900.
European standard: EN CuSn6.
Japanese standard: JIS C5191.
Chinese standard: GB/T2059-2000.
These standards ensure the uniformity and reliability of C51900 copper tubes in chemical composition, mechanical properties and dimensional accuracy. In addition, C51900 copper tubes also meet environmental certification requirements such as RoHS, CE and RAEE.
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 tube:
1. Production process
Raw material preparation
The main components of C51900 copper tube are copper and tin, of which the copper content is about 96.8%, the tin content is about 6%, and the phosphorus content is 0.03%-0.35%. In the production process, it starts with cathode copper and phosphor copper alloy, which are melted by industrial frequency furnace (the temperature reaches 1200℃), and then horizontal continuous casting and cooling.
Processing process
Continuous casting and rolling process: The continuous casting and rolling process is adopted, including horizontal continuous casting, milling, stretching, rewinding and other processes. This process is short, the production efficiency is high, and the product consistency is good.
Subsequent processes: including milling, planetary rolling, triple drawing, disk drawing and other processes, which further improve the dimensional accuracy and surface quality of copper tubes.
Annealing treatment: The annealing process improves the plasticity and toughness of the material, while eliminating the processing stress and ensuring the mechanical properties of the finished product.
Environmental protection and energy saving
During the production process, advanced energy-saving technologies and environmental protection measures are adopted, such as automatic temperature control, frequency conversion and power regulation technology, and energy metering and monitoring systems, which reduce energy consumption and pollution.
Special process
Some manufacturers have also developed the "casting-rolling-drawing-short process copper straight tube production technology", which won the China Nonferrous Metals Industry Science and Technology Award and significantly improved production efficiency and product quality.
2. Product advantages
High strength and elasticity
C51900 copper tube has high strength and good elasticity, can withstand high pressure processing in cold and hot states, and is suitable for manufacturing springs, elastic components, etc.
Wear resistance and corrosion resistance
Due to the presence of phosphorus, C51900 copper tube has excellent wear resistance and corrosion resistance, and performs well in the atmosphere and fresh water, and is suitable for use in harsh environments such as chemical equipment and bridge support plates.
Good welding performance
The material is easy to weld and braze, and is suitable for manufacturing parts that require welding connections, such as spring contact pieces, electrical switches, etc.
Excellent conductivity
C51900 copper tube has high conductivity and is suitable for manufacturing current-carrying springs and other electrical components.
Excellent processing performance
The material is easy to cut and process, suitable for manufacturing various parts with complex shapes, such as flexible metal hoses, spring leaves, etc.
Wide range of applications
Due to its excellent comprehensive performance, C51900 copper tube is widely used in the fields of aviation industry, electronics and electrical, machinery manufacturing, chemical equipment, etc. For example, it is used to manufacture precision parts in the aviation industry and springs and contacts in the electronics and electrical fields.
Environmental protection and sustainability
Pay attention to environmental protection during the production process, and use advanced wastewater recovery and waste gas treatment technologies to reduce the impact on the environment.
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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