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Dimensional Specifications for C65500 Rods
C65500 rods are available in solid round bars, with standardized dimensions and tolerances per international specifications:
Tolerances (ASTM B98/B98M):
- Diameter: ±0.051 mm (0.002") for rods ≤1/2" (12.7 mm); ±0.33 mm (0.013") for rods up to 10" (254 mm) .
- Hardness and tensile properties vary with temper (e.g., H04 hard temper: 485–615 MPa tensile strength) .
International Standards
C65500 rods are governed by the following standards:
- ASTM B98/B98M
- Specifies chemical composition, mechanical properties, and tolerances for copper-silicon rods, bars, and shapes (UNS C65500) .
- Temper Designations:
- O60 (Soft Anneal): Tensile strength ≥360 MPa, hardness ≤35 HRB.
- H04 (Hard): Tensile strength ≥485 MPa, hardness 75–95 HRB .
ASME Boiler & Pressure Vessel Code (BPVC) Section II, Part B
Adopts ASTM B98 for pressure vessel and heat exchanger applications, with additional guidelines for hardness (e.g., H04: 60–95 HRB) .
3. JIS H 3250 (Japanese Industrial Standard)
- Covers extruded copper alloy rods, including dimensional tolerances and mechanical testing methods .
- YS/T 649-2007 (China Nonferrous Standard)
- Specifies requirements for extruded rods, including tolerances and inspection protocols .
Chemical Composition
C65500 is a high-silicon bronze alloy primarily composed of copper (Cu) and silicon (Si), with controlled additions of manganese (Mn), iron (Fe), zinc (Zn), and trace impurities. The chemical composition adheres to ASTM B98M-2003, B99M-2006, and B315-2006 standards . Key elements are specified as follows:
Notes:
- Silicon (Si) is the primary strengthening element, enhancing wear resistance, fatigue strength, and corrosion resistance .
- Manganese (Mn) improves hot workability and contributes to age-hardening .
- Impurities like lead (Pb) are tightly controlled to avoid embrittlement .
C65500 exhibits a unique combination of strength, ductility, and corrosion resistance. Its mechanical properties vary significantly with temper (heat treatment and cold-working states). Below are detailed specifications across common temper designations:
2.1 General Mechanical Properties (Typical)
- Tensile Strength: 345–620 MPa (50–90 ksi) .
- Yield Strength (0.5% offset): 105–380 MPa (15–55 ksi) .
- Elongation: 8%–35% (depending on temper) .
- Hardness: 60–100 HRF (Rockwell F Scale) or 75–95 HRB (Rockwell B Scale) .
- Density: 8.53–8.94 g/cm³ .
2.2 Mechanical Properties by Temper Designation
C65500 is available in multiple tempers, as defined by ASTM B98 and ASME BPVC standards. Below are key states:
Notes:
- Age Hardening: C65500 can be precipitation-hardened by aging at 150–350°C (302–662°F), enhancing strength through Mn-silicide precipitation .
- Cold Work: Pre- or post-aging cold work further increases strength (e.g., H04 temper)
Production process
Smelting and casting
The raw materials include electrolytic copper, silicon, manganese and other alloy elements, which are melted in an electric furnace (temperature of about 1100℃), and slag removers are added to remove impurities.
Advanced technologies such as "large-tonnage electric furnace melting-submerged liquid transfer-multi-head multi-stream horizontal continuous casting" can efficiently utilize scrap copper, reduce pollution and improve production efficiency.
Some processes add crystalline silicon during the melting stage to ensure the silicon content (2.7%-4.0%).
Forming and processing
After casting, the material density and surface quality are improved by extrusion or stretching. The mainstream domestic method uses extrusion, combined with subsequent stretching, which significantly improves product performance.
Intermediate annealing treatment (650-750℃ insulation for 3 hours) eliminates work hardening and optimizes cold processing performance.
Special processes such as hydrostatic extrusion can achieve severe plastic deformation at room temperature, refine grains, and increase tensile strength and yield strength by 45% and 130% respectively.
Post-processing
Includes cutting, polishing, straightening and other steps, and finally forms a standardized copper rod product.
Product advantages
Excellent corrosion resistance
It performs well in seawater, freshwater and polluted environments, and has anti-biological adhesion and antibacterial properties, suitable for medical equipment and marine engineering.
High mechanical properties
Tensile strength ≥450MPa, yield strength ≥200MPa, elongation ≥10%. It can be further strengthened by processes such as hydrostatic extrusion to meet the needs of high-strength engineering.
Good processing performance
Excellent cold and hot processing performance, can be welded, brazed and soldered, suitable for complex parts manufacturing. Annealing process ensures the stability of the material after processing.
Versatility
Good electrical and thermal conductivity, suitable for electrical components (such as switches, connectors) and heat exchangers. Non-magnetic properties make it suitable for magnetically sensitive environments.
Wide application areas
Covering multiple industries such as ships (propeller shafts, fasteners), aerospace (hydraulic pipes), electronics (precision instrument parts) and construction (bridge bearing plates).
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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