C51000 Phosphor Bronze Manufacturer & Supplier
Five percent tin bronze, phosphorus deoxidised. Springs harder than brass, resists fatigue and does not stress-corrosion crack, so it holds contact and spring duty where brass would season crack.
UNS: UNS C51000 / CW451K CuSn5 | Category: Phosphor Bronze
Size Range
Outer Diameter: Strip 0.1-3 mm · sheet 0.5-6 mm · rod 6-50 mm
Chemical Composition (%)
| Cu | Sn | P | Zn |
|---|---|---|---|
| balance | 4.2-5.8 | 0.03-0.35 | 0.30 max |
Mechanical Properties
- Tensile Strength
- 340-400 MPa (annealed), 560-690 MPa (spring hard)
- Yield Strength
- 140 MPa annealed
- Elongation
- 48% annealed
- Hardness
- 75 HV annealed, 180-200 HV spring
Applicable Standards
- ASTM B103
- ASTM B139
- EN 1654
- EN 10204 3.1
Applications
- Contact springs and clips
- Connector shells and terminals
- Bellows and diaphragms
- Bushes and thrust washers
- Fasteners in corrosive service
Industries Served
- Electrical & Electronics
- Switchgear & Panel Building
- General Engineering
- Automotive & Auto Components
- Marine & Shipbuilding
- Defence
Equivalent Grades
- CW451K
- CW451K
- CuSn5
- CuSn5
- C51000
- C51000
- JIS C5191
- JIS C5191
- PB102
- PB102