Hyper Phosphor Bronze
C5240 (HP)
C5240 (HP)
High Strength 10% Tin Phosphor Bronze
Overview
Hi-Performance C5240 alloy (C5240 (HP)), was developed by enhancing the conventional phosphor bronze alloy C5240. C5240 alloy is phosphor bronze containing 10% tin, with greater strength than 8% tin phosphor bronze (C5210 alloy) and excellent bend formability. A further improvement in bend formability is achieved by means of our strength-enhancing technology. As a material in increasingly compact switches, connectors, relays, and other electronic parts, it meets customer requirements with its high strength properties.
(We provide the Hi-Performance Series-materials with the same composition as conventional products but with advanced material properties achieved by precision process control.)
Table 1. C5240 (HP) chemical composition (%)
| Cu | Sn | P | |
|---|---|---|---|
| Standard composition | Remainder | 10.0 | 0.1 |
Table 2. Physical properties of C5240 (HP)
| Electrical conductivity | 10 | %IACS(@20℃) |
|---|---|---|
| Specific resistivity | 157 | nΩ·m(@20℃) |
| Thermal conductivity | 50 | W/mK |
| Linear expansion coefficient | 18.4 | ×10-6/K(20 to 300℃) |
| Modulus of elasticity | 100 | GPa |
| Specific gravity | 8.78 |
Table 3. Mechanical properties of C5240 (HP) (upper: typical values, lower: specification range)
| Temper | Tensile strength (MPa) |
Yield strength (MPa) |
Elongation (%) |
Vickers hardness (Hv) |
|---|---|---|---|---|
| H(HP) | 708 650-750 |
617 580-690 |
29.6 ≧11 |
- 200-240 |
| EH(HP) | 805 750-850 |
755 650-790 |
18.5 ≧9 |
- 230-270 |
| SH(HP) | 866 850-950 |
813 780-920 |
11.6 ≧5 |
- 250-290 |
| ESH(HP) | 998 950-1050 |
935 900-1030 |
2.8 ≧1 |
- 270-310 |
| XSH(HP) | 1039 1000-1200 |
997 950-1190 |
1.1 Rec. |
- ≧290 |
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