Nov 13 2012
Topics Covered
Introduction
Chemical Composition
Physical Properties
Mechanical Properties
Thermal Properties
Other Designations
Fabrication and Heat Treatment
Annealing
Cold Working
Welding
Machinability
Hot Working
Introduction
UNS C51000 phosphor bronze copper alloy has an excellent combination
of ductility and strength and possess good spring qualities.
A few other bronze copper alloys excluding the phosphor bronze
copper alloy include:
- Tin bronze
- Aluminum bronze
- Silicon bronze
- Architectural bronze
- Manganese bronze
The addition of phosphor in bronze alloys results in increased wear
resistance, fatigue resistance and hardness, thus allowing the usage of
the phosphor bronze alloys in shafts, fasteners, valve spindles,
masonry fixings, bearings, springs and gears.
The datasheet given below provides an overview of UNS C51000
phosphor bronze copper alloy.
Chemical Composition
The chemical composition of UNS C51000 phosphor bronze copper alloy
is outlined in the following table.
| Element |
Content
(%) |
| Copper, Cu |
95.0 |
| Tin, Sn |
5.0 |
| Phosphorous, P |
trace |
Physical Properties
The following table shows the physical properties of the UNS C51000
copper alloy.
| Properties |
Metric |
Imperial |
| Density |
8.86 g/cm3 |
0.320 lb/in³ |
| Melting point |
954°C |
1750°F |
Mechanical Properties
The mechanical properties of the UNS C51000 copper alloy are
displayed in the following table.
| Properties |
Metric |
Imperial |
| Tensile strength |
324-965 MPa |
47000-140000 psi |
| Yield strength (depending on temper) |
131-552 MPa |
19000-80100 psi |
| Elongation at break (in 50.8 mm) |
64% |
64% |
| Machinability (UNS C36000 (free-cutting brass) =
100) |
20 |
20 |
| Shear modulus |
41 GPa |
5950 ksi |
| Poisson's ratio |
0.34 |
0.34 |
| Elastic modulus |
117 GPa |
16969 ksi |
Thermal Properties
The thermal properties of the UNS C51000 copper alloy are given in
the following table.
| Properties |
Metric |
Imperial |
| Thermal expansion co-efficient
(@20-300°C/68-572°F) |
17.8 µm/m°C |
9.89 µin/in°F |
| Thermal conductivity (@20°C/68°F) |
84 W/mK |
583 BTU in/hr.ft².°F |
Other Designations
Equivalent materials to the UNS C51000 copper alloy are given in the
table below.
- AMS4720
- ASTM B100
- ASTM B103
- ASTM B139
- ASTMB159
- ASTM F467
- ASTM F468
- MILB-13501
- MIL W-6712
- QQ W321
- SAE J461
- SAE J463
Fabrication and Heat Treatment
Annealing
UNS C51000 copper alloy is annealed between 482 and 677°C (900 and
1250°F).
Cold Working
UNS C51000 copper alloy has excellent cold working capacity.
Welding
Welding processes suitable for UNS C51000 copper alloy include
brazing, soldering, butt welding, seam welding, oxyacetylene welding,
coated metal arc welding, spot welding and gas shielded arc welding.
Machinability
The machinability rating of UNS C51000 copper alloy is 20.
Hot Working
UNS C51000 copper alloy is rated with poor hot forming capacity.