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Dimensional Specifications
While specific dimensional ranges for C65300 wire are not explicitly detailed in the provided data, general copper wire standards and manufacturing practices can be extrapolated:
Diameter Ranges:- Standard diameters for copper wires typically span 0.015 mm to 5.0 mm, depending on the application. For instance:
- Ultra-fine wires: 0.015–0.1 mm (±0.0024–0.004 mm tolerance) .
- Medium to thick wires: 2.5–5.0 mm (±0.005–0.01 mm tolerance), commonly used in heavy-duty electrical connections .
- C65300 wire used in split bolts or conductors likely follows similar industrial standards for diameters (e.g., 2.5–5.0 mm) to ensure compatibility with electrical systems .
- Common cross-sectional areas for copper wires include 0.5–300 mm², with specifications tailored to mechanical and electrical requirements. For example:
- 2.5 mm²: Suitable for low-current applications.
- 200 mm²: Used in high-power transmission, often comprising 37 strands of 2.6 mm diameter wire .
Tolerance Standards:
IEC standards specify tight tolerances, such as ±0.0016 mm for 0.020 mm diameter wires, ensuring precision in electrical and structural performance .
International Standards
C65300 wire adheres to multiple international standards governing composition, mechanical properties, and packaging:
Chemical Composition:
- Complies with ASTM B96 for silicon bronze alloys, which mandates silicon (2.0–4.0%), manganese (0.5–1.5%), and controlled impurity levels .
Mechanical and Electrical Properties:
- Tensile Strength: Typically exceeds 300 MPa after hardening processes, as seen in copper wire manufacturing techniques like cold drawing and heat treatment .
- Conductivity: Maintains ≥100% IACS (International Annealed Copper Standard) for electrical efficiency, particularly in annealed or soft-tempered states .
- Tensile Strength: Typically exceeds 300 MPa after hardening processes, as seen in copper wire manufacturing techniques like cold drawing and heat treatment .
Packaging and Labeling:
- Per GB/T 20509-2023 and Chinese standards, C65300 wire must be:
- Packaged in moisture-proof, corrosion-resistant materials (e.g., plastic wraps with stainless steel straps).
- Labeled with manufacturer details, batch number, net weight, and production date .
- Transportation and Storage:
- Requires protection against mechanical damage and environmental exposure during transit, with temperature limits of -40°C to +55°C .
Based on the provided data from Chemical Composition of Copper Alloys (2014-12-03) , the C65300 silicon bronze alloy has the following elemental composition ranges (in weight percentage):
While direct mechanical data for C65300 is limited in the provided sources, inferences can be drawn from related silicon bronze alloys (e.g., C65100, C65500) and manufacturing processes:
General Mechanical Characteristics
Strength:
- Tensile Strength: Silicon bronze alloys typically exhibit tensile strengths ranging from 275 MPa (40 ksi) in annealed states to 700 MPa (101.5 ksi) in cold-worked conditions. Forged C65300 components (e.g., split bolts) are noted for enhanced rigidity and strength due to refined grain structures .
- Yield Strength: Estimated between 95 MPa (13.8 ksi) (soft temper) and 440 MPa (63.8 ksi) (hard temper), based on analogous alloys like C65100 .
Elongation:
- Elongation at Break: Silicon bronzes generally achieve 15–35% elongation in annealed states, reflecting good ductility .
- Hardness:
- Typical hardness ranges from HB 80–150, depending on temper and processing (e.g., forging vs. casting) .
Key Performance Advantages
- Corrosion Resistance: Excellent resistance to seawater, steam, and industrial atmospheres, making it suitable for marine and chemical applications .
- Electrical Conductivity: Moderate conductivity (~12% IACS), ideal for electrical hardware like connectors and split bolts .
- Weldability: Superior weldability compared to other copper alloys, allowing for gas-shielded arc welding and brazing .
Production process
Raw material processing
Electrolytic copper or recycled copper is used as raw material, and copper rods are formed through processes such as melting, casting, and rolling. Some processes use copper particles or copper oxides to directly electrolytically deposit copper foil, eliminating the traditional casting steps.
Stretching and annealing
Multi-stage wire drawing: The wire diameter is reduced in stages through large drawing machines, medium drawing machines, and micro drawing machines, among which the micro drawing process can reach an accuracy of 0.015mm. The continuous drawing and annealing technology is used, combined with high current anti-oxidation annealing treatment, to improve ductility and conductivity.
Annealing control: The annealing temperature needs to be precisely adjusted to eliminate internal stress and avoid performance degradation due to secondary heating (such as subsequent tinning). Forging technology is mentioned instead of casting to form a finer grain structure and enhance material strength.
Surface treatment
Tinning process: including wire laying → annealing → pickling → tinning → cooling → winding and other steps. Use a tin scraping die to control the thickness of the tin layer (the aperture is 0.05mm larger than the wire diameter), and use air cooling or guide shaft oil to reduce surface oxidation.
Anti-oxidation measures: After annealing, the copper wire needs to be quickly cooled and tinned to avoid oxidation caused by surface lubricants.
Quality inspection
It runs through the entire production process, including raw material inspection, semi-finished product inspection and finished product inspection, involving tensile strength testing, surface defect detection (such as sodium polysulfide solution immersion test), solderability testing, etc.
Product core advantages
High strength and fatigue resistance
The forging process and uniform grain structure give the material high mechanical strength, with a tensile strength of 60,000-95,000psi, suitable for high stress scenarios such as electrical connectors and mechanical parts.
Excellent conductivity
As a highly conductive silicon bronze, the conductivity is close to that of pure copper, and the electron mobility is optimized through the annealing process.
Surface quality and corrosion resistance
The tinning layer provides anti-oxidation, acid and alkali resistance and atmospheric corrosion protection, extending the service life.
The wire drawing machine technology ensures a wire diameter tolerance of ±0.001mm and a burr-free surface.
Process efficiency and environmental protection
The continuous drawing and annealing technology reduces processing losses and has a high utilization rate of raw materials.
Environmentally friendly tin plating process is adopted to avoid harmful substances such as lead and beryllium.
Wide application range
Suitable for high-demand fields such as wires and cables, electronic components, automotive parts and aerospace, with both high temperature stability and welding reliability.
Technical highlights
Forging instead of casting: refine the grain structure and improve the rigidity of the material.
Thin paint multi-coating technology: 7-10 layers of coating are achieved according to demand to enhance insulation.
Closed-loop quality control: From chemical analysis to physical performance testing, ensure the stability of ingredients and consistency of performance.
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.
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