Low Tin Phosphorus Bronze for Terminals and Connectors KLF™-5
Connector material with excellent bend-formability, strength, springiness, and electrical conductivity
CDA No.50715
KLF™-5 is low-tin phosphorous bronze that contains small amounts of iron, phosphorus and tin in its chemical composition. This product is suitable for hot rolled process. Hardened by Fe-P precipitates in copper matrix, KLF™-5 exhibits higher electrical conductivity compared to normal phosphorous bronze. With improved properties, KLF™-5 achieves excellent cost performance.
Features
- Heat resistance temperature, exceeding that of phosphorous bronze by about 100 degrees
- Excellent electrical and thermal conductivity, exceeding that of brass or phosphorous bronze by 40 to 50%
- Excellent solderability and platability
- Excellent stress corrosion cracking resistance, superior to phosphorous bronze
- Excellent strength, equivalent to that of phosphorous bronze
Applications
- Small terminal connectors
- Terminals for automobiles, etc.
Nominal Compositions
Cu-2.0Sn-0.1Fe-0.03P (mass%)
Characteristics
Physical Properties
| Specific Gravity | 8.9 |
|---|---|
| Coefficient of Thermal Expansion（293～573K） | 17.6 x 10 -6 /K |
| Thermal Conductivity（293K） | 150 W/m.K |
| Electrical Resistivity（293K） | 49.3 nΩ.m |
| Electrical Conductivity（293K） | 35 %IACS |
| Modulus Elasticity（293K） | 123 GPa |
- *Note: The above are typical characteristics.
Mechanical Properties
| Temper | Tensile Strength MPa |
Yield Strength MPa |
Elongation % |
Vickers Hardness MHv: 4.9N |
|---|---|---|---|---|
| 1/2H | 440–540 | 450 | 8 min | 140–180 |
| H | 530–640 | 530 | 5 min | 160–200 |
- *Note 1: Yield strength are nominal values.
- *Note 2: The above tensile strength and hardness are standard specifications. Technical specifications will be determined according to consumer requests.
90°V-Type Bend-Formability (MBR)
| Temper | Good Way | Bad Way |
|---|---|---|
| 1/2H | 0 | 0 |
| H | 0 | 0 |
- *Note: The above are typical characteristics. The value slightly varies depending on the thickness of specimens.
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