![Phosphor Bronze Grade-I [ PB-I ]](/wp-content/uploads/2018/08/RCI-Logo-01.png){kind=logo}
| Alloy Names (as per RoHS specifications) | |
|---|---|
| IS/ISO | CuSn4 |
| DIN CEN/TS 13388 | CW450K |
| UNS | C51100 |
| JIS | C51100 |
| Chemical Composition | Weight percentage |
|---|---|
| Tin [Sn] | 3.5 % to 4.5% |
| Phosphorus [P] | 0.03% to 0.35% |
| Zinc [Zn] | 0.30% Maximum |
| Lead [Pb] | 0.05 % Maximum |
| Copper [Cu] | Remainder % |
| Characterists |
|---|
|
| Main Applications |
|---|
| Electrical : Contact Springs,Relais Springs,Terminals,Switch Parts Fuse Clips,Electronic connectors. Fasteners : Lock Washers,Fasteners. Industrial : Textile Machinery,perforated Sheets,Springs,Sleeve Bushing,Clutch Disks. General : Stamped parts,Connectors,Contact Springs,spring Elements,Ultra high strength spring elements,Fixed contacts. |
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 | 100 | W/(m·K) |
| Electrical Conductivity (1 MS/m = 1 m/(O mm²) | ≥ 11 | MS/m |
| Electrical Conductivity (IACS) | ≥ 19 | % |
| 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) | 295 Min | ≤ 190* | 40 Min | 80 Max |
| HA (Quater Hard) | 340 Min | ≥ 320 | 30 Min | 100 Min |
| HB (Half Hard) | 430 Min | ≥ 440 | 8 Min | 150 Min |
| HD (Hard) | 510 Min | ≥ 480 | 4 Min | 175 Min |
| HE (Extra Hard) | 620 Min | ≥ 560 | 2 Min | 180 Min |
| HS (Spring Hard) | 650 Min | ≥ 620 | 200 Min |
