Phosphor bronze
Overview
Phosphor bronze is a copper alloy that uses P to remove oxygen from copper and bronze (Cu-Sn) with a small amount of P remaining, and adds phosphorus to improve mechanical properties (toughness, elasticity, wear resistance, corrosion resistance). It generally contains 2.0-8.0% tin, 0.1-0.4% phosphorus, and the remainder is copper.
Application
Phosphor bronze is mainly used as wear-resistant parts and elastic components, computer connectors, mobile phone connectors, high-tech industry connectors, electronic and electrical springs, switches, slots for electronic products, keys, electrical connectors, lead frames, vibration pieces and terminals.
Typical usage of capillary tube of phosphor bronze is electron probe bushing.
Performance
Phosphor bronze has good electrical conductivity, is not easy to heat, ensures safety and has strong fatigue resistance. It has good corrosion resistance, wear resistance, and no spark during impact.
Typical material
| Material | Cu | Sn | P | Fe | Pb | Al | Zn | Impurity |
|---|---|---|---|---|---|---|---|---|
| QSn4.0-0.3 | Bal. | 3.5-4.9 | 0.03-0.35 | ≤0.10 | ≤0.05 | ≤0.30 | ≤0.95 | |
| QSn6.5-0.1 | Bal. | 6.0-7.0 | 0.10-0.25 | ≤0.05 | ≤0.02 | ≤0.002 | ≤0.30 | ≤0.40 |
| QSn6.5-0.4 | Bal. | 6.0-7.0 | 0.26-0.40 | ≤0.05 | ≤0.02 | ≤0.002 | ≤0.30 | ≤0.40 |
Mechanical properties
| Material | Tensile strength MPa |
Elongation in 2” % min. |
Condition |
|---|---|---|---|
|
QSn4.0-0.3 |
≥325 | ≥30 | Annealed |
| ≥490 | Hard |
Product forms
Capillary tube
- ◎ OD 0.30 ~ 3.0 mm
- ◎ WT 0.05 ~ 0.5 mm
Precision seamless tube
- ◎ OD 3.0 ~ 100 mm
- ◎ WT 0.10 ~ 10.0 mm
Service
- ◎ Precision cutting
- ◎ Tube surface treatment, like ID surface super mirror polishing, best level could reach Ra0.0015um
- ◎ Tube deep processing, like coiling, bending, end forming, body forming, laser processing, various needles processing, built to drawing and sample, etc.