‹
›
‹
›
Dimensional Ranges for C92500 Copper Tubes
C92500 tubes are available in the following specifications (exclusive to tubular forms):
International Standards for C92500 Copper Tubes
C92500 tubes comply with the following globally recognized standards:
A. Chinese National Standards (GB/T)
- GB/T 17791-2007: Covers seamless copper tubes for air conditioning and refrigeration, emphasizing mechanical properties and dimensional tolerances .
- GB/T 20928-2007: Specifies requirements for internally threaded copper tubes, widely accepted in international trade due to China’s leadership in HVAC applications .
B. European Standards (EN)
- EN 1057: Defines seamless copper tubes for water, gas, and heating systems, aligned with EU Pressure Equipment Directive (PED) .
- EN 12452:2012: Applies to heat exchanger tubes with OD 6–35mm and wall thickness 1–3mm, ensuring compatibility with EU Construction Products Directive .
C. ASTM Standards
- ASTM B505/B505M: Governs continuous castings for C92500 alloy, ensuring chemical composition and mechanical integrity .
- ASTM B111/B111M: Specifies seamless copper tubes for condensers and heat exchangers, often referenced in global procurement .
D. Industry-Specific Standards
- Marine Engineering: Bureau Veritas and DNV-GL standards define minimum wall thickness and pressure ratings for seawater piping systems .
C92500 is a high-tin leaded nickel-tin bronze with the following chemical composition ranges :
Notes:
- The alloy conforms to ASTM B505/B505M-2005 for continuous castings .
- Variations in Sn content (e.g., ~9% Sn in some reports ) reflect specific manufacturing tolerances or application-driven modifications.
Mechanical Properties of C92500 Copper
C92500 exhibits a balanced combination of mechanical strength, wear resistance, and corrosion stability, making it suitable for demanding environments. Key properties include:
1. Tensile Strength
- Ultimate Tensile Strength (UTS): 275–300 MPa .
- Yield Strength (0.5% Offset): ~140 MPa (typical for as-cast conditions; increases with heat treatment) .
2. Elongation
- Elongation at Break: ~30% (indicating moderate ductility for a high-strength bronze) .
3. Hardness
- Brinell Hardness (HB): ~65 HB (500 kg load) .
4. Fatigue and Creep Resistance
- Fatigue Strength: ~76 MPa (10⁸ cycles, rotating beam test) .
- Creep Strength:
- 110 MPa at 177°C (350°F) .
- 43 MPa at 288°C (550°F) .
5. Machinability
- Rated at 30% FMB (Free Machining Brass scale), improved by lead (Pb) content for smoother cutting operations .
6. Thermal and Electrical Properties
- Thermal Conductivity: Moderate (lower than pure copper due to alloying elements).
- Electrical Conductivity: ~15% IACS (suitable for electrical contacts but not high-current applications) .
The production process and product advantages of C92500 copper tube are as follows:
Production process
Smelting and casting
C92500 is a high-tin bronze alloy (tin content is about 9-12%). The raw materials are mainly cathode copper and phosphor copper alloy, which are melted at a high temperature of 1200℃ in an industrial frequency furnace. Then the horizontal continuous casting process is used to form the tube billet, which is cooled to 50℃ to form a tube billet. This process reduces the traditional hot extrusion steps and improves efficiency.
2. Rolling and stretching
After the tube billet is milled to remove surface defects, it is plastically deformed through cold processing processes such as planetary rolling and triple drawing to gradually thin the tube wall and improve accuracy. Subsequently, disk drawing or continuous drawing is used to further refine the size. Drawing oil lubrication is required during the process to reduce friction.
Annealing and surface treatment
The online annealing process is used to eliminate work hardening and restore the ductility of the material. Surface cleaning and rewinding (defect detection) ensure that the copper tube has no defects such as cracks, and finally annealing is used to stabilize the material properties.
Environmental protection measures
The waste emulsion, copper chips and waste mineral oil generated during the production process are all recycled and treated, and the waste gas (such as G1-G4) is purified through the collection system to meet environmental protection standards.
Product advantages
Excellent mechanical properties
The tensile strength of C92500 copper tube is ≥440MPa, the elongation is ≥30%, the yield strength is high, and it is strengthened by adding nickel and phosphorus, and has good machinability (machinability is 42% FMB), which is suitable for complex parts processing.
Excellent corrosion resistance
The high tin content (9-12%) makes it stable in seawater, steam and acid-base environments, especially suitable for harsh working conditions such as ships and seawater desalination.
Wear resistance and fatigue resistance
The synergistic effect of tin and lead improves wear resistance, which is suitable for high-load friction environments (such as bearings and gears). At the same time, the fatigue strength is excellent and can serve in dynamic stress scenarios for a long time.
Convenience of processing and installation
Copper pipes are flexible and can be bent and twisted without cracking. The anti-freezing and impact-resistant design enhances the reliability in the building water supply system, and supports customized sizes (outer diameter ≤50mm to >50mm, length up to 7000mm).
Wide application areas
In addition to traditional water heating and air conditioning pipes, they are also used in the nuclear industry, petrochemical industry, aerospace and military fields (such as aircraft parts), covering multiple industries such as construction, shipbuilding, and electricity.
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.
Welcome To Your Inquiry
What can we help you?
