C5440 Copper-Tin Alloy
C5440 Copper-Tin Alloy
C5440 is a Japanese standard leaded phosphor bronze alloy, widely recognized for its excellent machinability, dimensional stability, and superior corrosion resistance. This alloy is used for manufacturing precision parts, automotive components, and electrical connectors that demand consistent performance.
Chemical Composition (%)
| Element | Range (%) |
|---|---|
| Copper (Cu) | Remainder |
| Tin (Sn) | 3.5 – 4.5 |
| Lead (Pb) | 3.5 – 4.5 |
| Zinc (Zn) | 3.5 – 4.5 |
| Phosphorus (P) | 0.01 – 0.4 |
| Nickel (Ni) | ≤ 0.2 |
| Iron (Fe) | ≤ 0.1 |
| Others | Total ≤ 0.2 |
This unique chemical balance ensures smooth machinability and long service life even under demanding industrial environments.
Mechanical Properties (Typical Values)
| Property | Value |
|---|---|
| Tensile Strength (Rm) | ~450 MPa |
| Yield Strength (Rp0.2) | ~350 MPa |
| Elongation (%) | 10 |
| Brinell Hardness (HB) | 150 |
These values make C5440 suitable for load-bearing parts while still providing enough ductility for machining and forming operations.
Suitable Casting & Processing Methods
| Process | Description |
|---|---|
| Sand Casting (GS) | Ideal for complex shapes |
| Permanent Mould Casting (GM) | Good dimensional consistency |
| Centrifugal Casting (GZ) | Excellent for hollow cylindrical components |
| Continuous Casting (GC) | Ensures superior surface finish |
| Pressure Die Casting (GP) | Suitable for high-volume production |
Material Conditions
| Condition | Description |
|---|---|
| R | Condition with minimum tensile strength & elongation requirements |
| H | Condition with minimum hardness requirement |
Applications of C5440 Copper Alloy
Bearings and Bushings – Ideal for wear resistance and lubrication properties
Valve Components – Suitable for hydraulic and fluid control systems
Electrical Connectors – Excellent electrical conductivity and corrosion protection
Automotive Parts – Gears, shafts, and precision machined components
General Engineering – Components requiring strength and reliable machinability
Why Choose Conex Casting for C5440?
High-quality JIS-compliant material sourced from reliable producers
Consistent chemical and mechanical properties for precision parts
Custom casting and machining solutions available
Fast and reliable delivery worldwide
