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C65100 Low Silicon Bronze "B" wire
C65100 is a low-silicon bronze alloy composed primarily of copper (Cu ≥ 99.5%) with silicon (Si: 0.8–2.0%) and trace elements such as iron (Fe ≤ 0.8%), zinc (Zn ≤ 1.5%), and manganese (Mn ≤ 0.7%) . It is renowned for its exceptional combination of strength, ductility, corrosion resistance, and electrical conductivity, making it ideal for demanding industrial applications.

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Parameter
Chemical Composition
Mechanical Properties
Detailed Dimensional Ranges

C65100 copper wire is available in round wire and flat wire forms. Specific dimensional ranges include:

Wire TypeDiameter/Thickness RangeCross-Sectional Area (Flat Wire)
Round Wire0.050 mm – 4.500 mm-
Flat Wire-2.50 mm² – 100.00 mm²

Notes:

  • Custom sizes (e.g., ultra-fine or large-diameter wires) can be produced based on customer requirements .
  • Tolerance standards follow ASTM specifications, ensuring precision for critical applications like aerospace fasteners .

 International Standards

C65100 wire complies with the following key standards:

StandardScopeKey Specifications
ASTM B99/B99M-2015General-purpose copper-silicon alloy wire- Chemical composition (Si: 0.8–2.0%, Cu ≥ 99.5%) .
- Mechanical properties by temper (e.g., H04 temper: 620–760 MPa tensile strength) .
ASTM B98/B98MRod, bar, and shapes (supports wire production parameters)- Defines temper designations (e.g., H04 for hard temper) .
ASME SB315Seamless copper alloy pipe and tubingRelevant for wire used in hydraulic/pneumatic systems .
ASTM B432General requirements for copper alloysCovers testing, certification, and surface quality .

Mechanical Property Requirements (ASTM B99/B99M-2015)

TemperTensile Strength (MPa)Elongation (%)
O61 (Annealed)260–380≥40
H04 (Hard)620–760≥8
H08 (Spring)≥690≥6

Note: Hard (H04) and spring (H08) tempers are unavailable for wires exceeding 12 mm and 6 mm, respectively .


Chemical Composition of C65100 Silicon Bronze:

  • Copper (Cu): ≥99.5%
  • Silicon (Si): 0.8–2.0%
  • Manganese (Mn): 0.7%
  • Zinc (Zn): ≤1.5%
  • Iron (Fe): ≤0.8%
  • Lead (Pb): ≤0.05%

Mechanical Properties of C65100 Silicon Bronze:
PropertyValue RangeNotes
Tensile Strength276–560 MPa (40–100 ksi)Varies with temper (e.g., annealed: 276–358 MPa; hard temper: 483–560 MPa)
Yield Strength83–440 MPa (12–64 ksi)Higher values in cold-worked or heat-treated conditions
Elongation6–50%Higher elongation in annealed states (e.g., 30–35% for O60 temper)
Shear Strength200–350 MPa
Elastic Modulus120 GPa
Hardness (Rockwell B)60–100 HRBDepends on temper; e.g., annealed: ~60 HRB, hard temper: ~100 HRB
Electrical Conductivity12–17% IACSLower than pure copper but suitable for electrical applications
Thermal Conductivity57 W/m·K

Key Characteristics:

  1. Corrosion Resistance: Excellent resistance to seawater, steam, and acidic environments, making it ideal for marine and chemical applications .
  2. Weldability and Formability: Suitable for welding (gas-shielded arc, resistance) and cold/hot working .
  3. Fatigue Endurance: High strength-to-weight ratio and fatigue resistance, suitable for fasteners and structural components .
  4. Temperature Performance: Maintains properties up to 200°C .


INTRODUCTION

Production process and key technologies

The production process of C65100 copper wire is divided into the following core steps, and the key technical parameters are strictly controlled:


Smelting-insulation-upward

The electrolytic copper plate is melted in an industrial frequency induction furnace, and the surface of the copper liquid is covered with charcoal to isolate oxygen, and enters the insulation furnace through a transition tank protected by carbon monoxide.

Key technology: oxygen content control (<10ppm), rapid cooling of the crystallizer to form an oxygen-free copper rod, and soft state conductivity ≥100% IACS.


Extrusion molding


Use continuous hot extrusion technology to eliminate surface defects and generate ultra-fine grain flat wire.

Advantages: Improve conductivity and mechanical strength, suitable for high voltage transformer electromagnetic wire.

Wire drawing process

Use polycrystalline mold and new lubricant, the dimensional error after wire drawing is ≤0.01mm.

Parameters: high total elongation coefficient (improve drawing efficiency), surface finish reaches industrial standards.


Hardening treatment


Through mold design and lubricant concentration optimization, the yield strength is as high as 300MPa, and the conductivity is still maintained at ≥100% IACS.

Painting and transposition processing

The baking process ensures that the breakdown voltage and wear resistance of the paint film meet the standards; the transposition technology reduces the friction of the enameled wire and avoids deformation



FAQ

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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