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Detailed size range:
Outer diameter range:
General connectors: φ10.19mm~φ168.27mm (such as threaded pipe joints).
Condenser/heat exchanger: 6mm~150mm (ASTM B43 standard).
Pipeline system: Sch 40 (standard wall thickness) covers 1/8" to 6", Sch 80 (extra thick wall) covers 1/8" to 4".
Wall thickness range:
General use: 0.7mm~5mm (ASTM B43).
Specific needs: Some applications can reach 42.5mm (such as air conditioning/refrigeration thick wall pipes), but need to be combined with specific standards.
International standards:
Material standards:
ASTM B43: specifies the chemical composition, mechanical properties and dimensional requirements of C23000 red brass tubes.
ASME Boiler and Pressure Vessel Code: Covers the annealed (O61) and stretched (H58) state standards for seamless red copper tubes.
Size and thread standards:
ASTM B687: Specification for pipe dimensions and tolerances.
ASME B1.20.1, ISO 7/1: Thread standards for external threaded connections.
Main components:
Copper (Cu): The content ranges from 84.0% to 86.0%.
Zinc (Zn): As a residual component, it usually accounts for about 14%-16%.
Trace elements:
Lead (Pb): The maximum content does not exceed 0.05%.
Iron (Fe): The maximum content does not exceed 0.05% (some standards such as GB/T 5231-2012 stipulate that Fe≤0.03%)
Mechanical properties vary depending on processing status, hardness level and product size:
Tensile strength:
H01 (semi-hard): Minimum tensile strength for bars with diameters less than 1/2 inch is 305 MPa (44 ksi), and for bars with diameters greater than 1 inch is 275 MPa (40 ksi).
H02 (semi-hard): 345 MPa (50 ksi) for bars with diameters less than 1/2 inch, and 275 MPa (40 ksi) for bars with diameters greater than 1 inch.
H04 (hard): 435 MPa (63 ksi) for bars with diameters less than 1/2 inch, and 400 MPa (58 ksi) for bars with diameters greater than 1 inch.
Combined with other standards, the tensile strength range can reach 269-724 MPa (39-105 ksi).
Yield Strength:
Wide range, from 69 MPa (10 ksi) to 480 MPa (70 ksi), depending on processing
Elongation:
Up to 55% (2-inch gauge length), elongation for different hardness grades in ASTM standards varies with diameter.
Hardness:
Rockwell B hardness ranges from 48-87, Rockwell Superficial 30T hardness ranges from 51-77; hardness values vary in different annealing states.
Other Parameters:
Modulus of Elasticity: Approximately 110-117 GPa.
Poisson's Ratio: 0.33-0.34.
Shear Strength: 220-340 MPa.
The production process and product advantages of C23000 copper tube can be summarized as follows:
Production process
Melting and continuous casting
The raw materials (cathode copper and phosphor copper alloy) are melted in an industrial frequency furnace (1200℃) and then formed by a horizontal continuous casting process.
Electromagnetic stirring technology: The copper liquid is electromagnetically stirred in the mold forming cavity to ensure uniform wall thickness, refine grains, and reduce defects such as pores and cracks.
Rolling and stretching
The planetary rolling process is combined with a long-stroke ring hole rolling mill to improve dimensional accuracy and eccentricity control.
The stretching process uses a high-speed series joint drawing machine and a floating core head technology to ensure the smoothness and dimensional accuracy of the internal and external surfaces.
Annealing and surface treatment
The annealing temperature range is 450~600℃, and the temperature is kept warm and then slowly cooled to restore plasticity.
The pickling, water washing and annealing processes are crucial to surface color control and need to be optimized through experiments to avoid yellowing problems.
Auxiliary processes
High-precision straightening machines are used for straightening to ensure straightness.
Welding technology (oxyacetylene welding, gas shielded arc welding, etc.) performs well, but arc welding of coated metals should be avoided.
Product Advantages
Mechanical Properties
High Strength and Plasticity: Tensile strength varies with hardness grade (H01/H02/H04), ranging from 275-435 MPa, elongation ≥45%, suitable for hot and cold processing.
Corrosion Resistance
Resistant to dezincification, pitting and seawater corrosion, suitable for humid or corrosive environments such as underground water pipes and ship parts.
Processing and Welding Performance
Excellent cold processing performance, suitable for complex forming such as bending and knurling.
Good welding and brazing performance, especially in oxyacetylene welding and gas shielded arc welding.
Thermal Performance and Antibacterial Properties
High temperature resistance meets the requirements of hot water systems, and the tensile strength remains stable without annealing.
The natural antibacterial properties of brass inhibit the growth of microorganisms and are suitable for water supply systems.
Wide Application
Construction Field: Hardware, fire fighting equipment, pipe fittings.
Water supply system: environmentally friendly water pipes (ASTM B43 standard), especially exported to the US market.
High-end fields: aviation, military industry, electronic equipment, because of its non-magnetic, heat-resistant and wear-resistant properties.
Standard compliance
Complies with many international standards such as ASTM B927/B927M, ASME boiler pressure vessel specifications, etc., to ensure stable quality
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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