IN 1982 CC493K | CuSn7Zn4Pb7
B7 | Bronze Copper Alloy Tin Lead
Available formats: Bars, Tubes, Caps, Plates and Plates.
B7 is a tin lead bronze also known as red bronze or leaded gunmetal.
The lead content in tin bronze alloys with a high lead content is between 7.00% and 15.00%. These alloys are free cut and retain a favorable thermal conductivity and good lubrication due to the lead content. The C93200 alloy, also called C932, SAE 660, is considered a family workhorse alloy and is widely used in many bearing applications.
The closest international standards are ASTM B505 C93200 and RG7 DIN 1705.
It has a good relationship between resistance and elongation. It is a semi-hard material resistant to wear, corrosion and sea water. General use.
Applications
CuSnPb alloys are characterized by their excellent anti-friction quality, high pressure resistance, corrosion, vibration and shock. They are recommended when lubrication is poor.
Typical applications: Bushings and Bearings with high loads, Presses and mechanical shovels, Connecting Rod Bushings, Pumps, Motors, Automotive and Railway Ind.
Chemical composition
|
%
|
Cu
|
Neither
|
P
|
Pb
|
Sn
|
Zn
|
Al
|
Fe
|
S
|
Sb
|
Others
|
Si
|
|
Min. |
81 |
- |
- |
6 |
6,3 |
1 |
- |
- |
- |
- |
- |
- |
|
Max. |
85 |
1 |
0,15 |
8 |
7,5 |
4 |
0,005 |
0,2 |
0,08 |
0,35 |
- |
0,005 |
Chemical composition according to ASTM B505 / B505M-18
features
B7 is a tin lead bronze also known as red bronze or leaded gunmetal.
The lead content in tin bronze alloys with a high lead content is between 7.00% and 15.00%. These alloys are free cut and retain a favorable thermal conductivity and good lubrication due to the lead content. The C93200 alloy, also called C932, SAE 660, is considered a family workhorse alloy and is widely used in many bearing applications.
The closest international standards are ASTM B505 C93200 and RG7 DIN 1705.
It has a good relationship between resistance and elongation. It is a semi-hard material resistant to wear, corrosion and sea water. General use.
Applications
CuSnPb alloys are characterized by their excellent anti-friction quality, high pressure resistance, corrosion, vibration and shock. They are recommended when lubrication is poor.
Typical applications: Bushings and Bearings with high loads, Presses and mechanical shovels, Connecting Rod Bushings, Pumps, Motors, Automotive and Railway Ind.
Chemical composition
|
Element
|
Min.%
|
Max. %
|
|
Cu Neither P Pb Sn Zn Al Fe S Sb Others / Alloys Si |
81 - - 6 6,3 1 - - - - - - |
85 1 0,15 8 7,5 4 0,005 0,2 0,08 0,35 - 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
|
|
B7 |
CuSn7Pb6Zn4 |
CC493K |
C93200 |
660 |
LG4 |
1705-RG7 |
B-584-932 |
Mechanical properties
|
Tensile strength
(MPa) |
Elastic limit
(MPa) |
Elongation
(%) |
Brinell hardness
(HB) |
Observations
|
|
241 |
138 |
10 |
65 |
- |
Mechanical properties according to ASTM B505 / B505M-18
International Equivalences
| BRONCESVAL | B7 |
|---|---|
| ISO / EN | CuSn7Pb6Zn4 |
| W Nr / DIN | CC493K |
| UNS / CDA | C93200 |
| SAE | 660 |
| BS | LG4 |
| DIN / ISO | 1705-RG7 |
| ASTM | B-584-932 |
Taken from a half radius of the molten bar, do not test apart from the molten bar.
Mechanical properties
| Tensile strength (MPa) | 241 |
|---|---|
| Elastic Limit (MPa) | 138 |
| Elongation (%) | 10 |
| Brinell hardness (HB) | 65 |
| Observations | - |
Mechanical properties according to ASTM B505 / B505M-18
General Physical Properties
| Melting Point (Liquid) | 977 ° C |
|---|---|
| Melting Point (Solid) | 854º C |
| Density | 8.91 gm / cm at 20 ° C |
| Specific weight | 8,91 |
| Electric conductivity | 0.07 MegaSiemens / cm at 20 ° C |
| Thermal conductivity | 58.2 W / m at 20 ° C |
| Thermal expansion coefficient | 17.3 · 10 -6 per ° C (20 ° -200 ° C) |
| Specific heat capacity | 377.1 J / kg at 293 ° C |
| Tension Elasticity Module | 100,000 Mpa |
| Magnetic Permeability * | 1 |
Physical properties provided by CDA
Manufacturing Properties
| Welding | Excellent |
|---|---|
| Braised | Good |
| Oxyacetylene Welding | Not recommendable |
| Gas arc welding | Not recommendable |
| Coated Metal Arc Welding | Not recommendable |
| Machinability Classification | 70 |
Manufacturing properties provided by CDA
Formats
- B7 Bronze Bars
- B7 Bronze Tubes
- B7 Bronze Caps
- B7 Bronze Plates
- B7 Bronze Plates
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