![Phosphor Bronze Grade-II [ PB-II ]](/wp-content/uploads/2018/08/RCI-Logo-01.png){kind=logo}
| Alloy Names (as per RoHS specifications) | |
|---|---|
| IS/ISO | CuSn5 |
| DIN CEN/TS 13388 | CW451K |
| UNS | C51000 |
| JIS | C5102 |
| Chemical Composition | Weight percentage |
|---|---|
| Tin [Sn] | 4.2 % to 5.8 % |
| Phosphorus [P] | 0.02 % to 0.10% |
| Zinc [Zn] | 0.30% Maximum |
| Lead [Pb] | 0.05 % Maximum |
| Copper [Cu] | Remainder % |
| Characterists |
|---|
|
| Main Applications |
|---|
| Electrical : Miniaturized Connectors,Contact Springs,Relais Springs,Terminals,Switch Parts,fuse Clips,Electronic Connectors,Resistance Wire,Wire Brushes. Fasteners : Lock Washers,Cotter pins,Fasteners. Industrial : Bellows,Textile Machinery,perforated sheets,Springs,Sleeve Bushing,Clutch Disks. |
Phosphorus Bronze Strips
Properties
| Density | 8.85 | g/cm3 |
| Thermal expansion coefficient - 191..16 | 17.8 | 10-6/K |
| 0..300°C | 18.1 | 10-6/K |
| Specific heat capacity | 0.377 | J/(g·K) |
| Thermal Conductivity | 96 | W/(m·K) |
| Electrical Conductivity (1 MS/m = 1 m/(O mm²) | ≥ 10 | MS/m |
| Electrical Conductivity (IACS) | ≥ 17.2 | % |
| Thermal coefficient of electrical resistance (0 .. 200 C) | 0.1 | 10-3/K |
| Modulus of elasticity (1 Gpa = 1 kN/mm²) cold formed | 110 | Gpa |
| 120 | Gpa |
| Temper | Tensile Strength | Yield Strength | Elongation Minimum | Hardness HV |
| Rm | Rp0.2 | A50mm | ||
| MPa(N/mm2) | MPa(N/mm2) | % | ||
| O (Soft) | 310 Min | ≤ 250 | 45 Min | 85 Max |
| HA (Quater Hard) | 350 Min | ≥ 300 | 35 Min | 110 Min |
| HB (Half Hard) | 495 Min | ≥ 400 | 10 Min | 160 Min |
| HD (Hard) | 570 Min | ≥ 500 | 4 Min | 180 Min |
| HE (Extra Hard) | 645 Min | ≥ 550 | 2 Min | 200 Min |
| HS (Spring Hard) | 690 Min |
