BP20 | Bronze Copper Alloy Tin Lead
Available formats: Bars, Tubes, Caps, Plates and Plates.
The lead content in the BP20 alloy is between 7 and 30 percent. Tin bronzes with high lead content are free cut and retain favorable thermal conductivity and good lubrication due to lead content.
Tin lead bronzes such as BP20 are ideal for bearing applications where there could be a loss of the lubrication limit. These alloys have excellent performance in unforgiving environments where there may be foreign matter, such as dirt and other foreign materials.
Alloys with a high lead content can wrap foreign matter due to its malleable nature and, in doing so, protect the wear surface of a coupling part, such as a shaft.
Applications
INDUSTRIAL: thrust block due to its properties: Corrosion resistance, Corrosion resistance in many environments, Low friction coefficient, Wear resistance, Excellent machinability.
TYPICAL USES: Bearings, bushings, centrifuge bushings, gears, hydraulic parts, impellers, linings, piston rings, pump and valve components, sleeves, steam fittings.
Chemical composition
%
|
Cu
|
Neither
|
P
|
Pb
|
Sn
|
Zn
|
Al
|
Fe
|
S
|
Sb
|
Others
|
Si
|
Min. |
72 |
- |
- |
18 |
4,5 |
- |
- |
- |
- |
- |
- |
- |
Max. |
79 |
1 |
0,5 |
22 |
6,5 |
1 |
0,005 |
0,25 |
0,08 |
0,8 |
- |
0,005 |
Chemical composition according to ASTM B505 / B505M-18
features
The lead content in the BP20 alloy is between 7 and 30 percent. Tin bronzes with high lead content are free cut and retain favorable thermal conductivity and good lubrication due to lead content.
Tin lead bronzes such as BP20 are ideal for bearing applications where there could be a loss of the lubrication limit. These alloys have excellent performance in unforgiving environments where there may be foreign matter, such as dirt and other foreign materials.
Alloys with a high lead content can wrap foreign matter due to its malleable nature and, in doing so, protect the wear surface of a coupling part, such as a shaft.
Applications
INDUSTRIAL: thrust block due to its properties: Corrosion resistance, Corrosion resistance in many environments, Low friction coefficient, Wear resistance, Excellent machinability.
TYPICAL USES: Bearings, bushings, centrifuge bushings, gears, hydraulic parts, impellers, linings, piston rings, pump and valve components, sleeves, steam fittings.
Chemical composition
Element
|
Min.%
|
Max. %
|
Cu Neither P Pb Sn Zn Al Fe S Sb Others / Alloys Mn |
72 - - 18 4,5 - - - - - - - |
79 1 0,5 22 6,5 1 0,005 0,25 0,08 0,8 - 0,005 |
Chemical composition according to ASTM B505 / B505M-18
International Equivalences
BRONCESVAL
|
ISO / EN
|
W Nr / DIN
|
UNS / CDA
|
SAE
|
BS
|
DIN / ISO
|
ASTM
|
BP20 |
CuSn5Pb20 |
CC497K |
C94100 |
94 |
LB5 |
- |
- |
Mechanical properties
Tensile strength
(MPa) |
Elastic limit
(MPa) |
Elongation
(%) |
Brinell hardness
(HB) |
Observations
|
172 |
117 |
7 |
50 |
- |
Mechanical properties according to ASTM B505 / B505M-18
International Equivalences
BRONCESVAL | BP20 |
---|---|
ISO / EN | CuSn5Pb20 |
W Nr / DIN | CC497K |
UNS / CDA | C94100 |
SAE | 94 |
BS | LB5 |
DIN / ISO | - |
ASTM | - |
Mechanical properties
Tensile strength (MPa) | 172 |
---|---|
Elastic Limit (MPa) | 117 |
Elongation (%) | 7 |
Brinell hardness (HB) | 50 |
Observations | - |
Mechanical properties according to ASTM B505 / B505M-18
General Physical Properties
Melting Point (Liquid) | 950 ° C |
---|---|
Melting Point (Solid) | 855º C |
Density | 9.2 gm / cm at 20 ° C |
Specific weight | 9,2 |
Electric conductivity | - |
Thermal conductivity | - |
Thermal expansion coefficient | - |
Specific heat capacity | - |
Tension Elasticity Module | - |
Magnetic Permeability * | - |
Physical properties provided by CDA
Manufacturing Properties
Welding | Good |
---|---|
Braised | Means, medium |
Oxyacetylene Welding | Not recommended |
Gas arc welding | Not recommended |
Coated Metal Arc Welding | Not recommended |
Machinability Classification | - |
Manufacturing properties provided by CDA
Formats
- BP20 Bronze Bars
- BP20 Bronze Tubes
- BP20 Bronze Caps
- BP20 Bronze Plates
- BP20 Bronze Plates