CDA636 (Silicon Aluminium Bronze)
CDA636 Silicon Aluminium Bronze is a copper-based alloy that combines the self-lubricating qualities of silicon with the mechanical strength of aluminium bronze. It is suited to electrical, fastener and industrial applications where cold heading, wear resistance and reliable performance are required.
- Description
- Product Specifications
Description
CDA636 Silicon Aluminium Bronze is designed for applications that need a balance of strength, anti-galling performance and formability. It is often used for components where good cold working capacity and dependable service under load are important.
This alloy is commonly used for pole line hardware components, cold headed nuts, cable connectors, bolts, screw machine products, valve components and nuclear power service applications. It is typically supplied in rod and wire form, with shapes including round, square, rectangular, hexagonal and profile sections.
Key Features:
- Silicon aluminium bronze alloy
- Good anti-galling and anti-seizing properties
- Excellent cold working capacity
- Suitable for cold heading
- Machinability rating of 40
- Fair welding suitability across several joining methods
- Used for electrical, fastener and industrial components
- Common shapes include round, square, rectangular, hexagonal and profile
| Element | Composition | Nominal |
|---|---|---|
| Copper (Cu) | Remainder | 95.5% |
| Aluminium (Al) | 3.0-4.0% | 3.5% |
| Silicon (Si) | 0.7-1.3% | 1.0% |
| Arsenic (As) | 0.15% max | – |
| Iron (Fe) | 0.15% max | – |
| Lead (Pb) | 0.05% max | – |
| Nickel (Ni) | 0.15% max | – |
| Tin (Sn) | 0.20% max | – |
| Zinc (Zn) | 0.50% max | – |
| Cu + Named Elements | 99.5% min | – |
| Form | Temper | Section Size | Tensile Strength | Elongation | Rockwell Hardness |
|---|---|---|---|---|---|
| Rod | O61 | – | 414 MPa | 64% | – |
| Wire | H01 | 12.4 mm | 579 MPa | 29% | 84 B |
| Rod | H01 | – | 510 MPa | 31% | – |
| Wire | H00 | 10.7 mm | 469 MPa | 52% | 71 B |
| Wire | O61 | 10 mm | 414 MPa | 67% | – |
| Melting Point – Liquidus | 1032°C |
|---|---|
| Density | 8.33 g/cm³ at 20°C |
| Specific Gravity | 8.33 |
| Electrical Resistivity | 14.36 microhm-cm at 20°C |
| Electrical Conductivity | 0.07 MegaSiemens/cm at 20°C |
| Thermal Conductivity | 57.1 W/m.K at 20°C |
| Coefficient of Thermal Expansion | 16.9 x 10⁻⁶ per °C, 20-300°C |
| Modulus of Elasticity | 110000 MPa |
| Applicable Specifications | No information available in the supplied data sheet |
|---|---|
| Common Fabrication Process | Cold heading |
| Soldering | Not recommended |
| Brazing | Not recommended |
| Gas Shielded Arc Welding | Fair |
| Coated Metal Arc Welding | Fair |
| Spot Weld | Fair |
| Seam Weld | Fair |
| Butt Weld | Fair |
| Cold Working | Excellent |
| Hot Forming | Fair |
| Machinability Rating | 40 |
| Common Temper Options | Rod H01 and O60, wire H00, H01 and O60 |
| Common Shapes | Round, square, rectangular, hexagonal and profile |
| Typical Uses | Pole line hardware components, cold headed nuts, cable connectors, bolts, screw machine products, valve components and nuclear power service applications |
| Casting Characteristics | No casting characteristics available for this alloy |
