AMPCOLOY® 83 Sand Castings – High-Performance Beryllium Copper Alloy
2.1247 is a 2 % beryllium copper alloy which displays very high mechanical properties with a reasonably good electrical and thermal conductivity.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 8.26 g/cm³ |
Recycled Content | 80 % |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Elastic modulus | 23.0 °C | 126 GPa | |
Elongation A5 | 23.0 °C | 2 % | |
Hardness, HBW | 23.0 °C | 320 [-] | HBW 10/3000 |
Hardness, Rockwell C | 23.0 °C | 33 [-] | |
Tensile strength | 23.0 °C | 830 MPa | |
Yield strength Rp0.5 | 23.0 °C | 586 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.75E-5 1/K |
Specific heat capacity | 23.0 °C | 420 J/(kg·K) |
Thermal conductivity | 23.0 °C | 106 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 23.0 °C | 1.16E+7 S/m |
Specific Electrical conductivity | 20 % IACS |
Chemical properties
| Property | Value | Comment | |
|---|---|---|---|
Beryllium | 2 % | ||
Cobalt | 0.5 % | Co+Ni | |
Copper | Balance | ||
Nickel | 0.5 % | Co+Ni | |
Other | 0.5 % | ||
Technological properties
| Property | ||
|---|---|---|
| Application areas | 2.1247 is used wherever good wear resistance or high mechanical properties are desired coupled with a good electrical or thermal conductivity, such as: Flash butt welding and butt welding, Parts for electrical components, in the plastic mould industry is sometimes used as chill plates and inserts in the moulds, cooling pins and neck rings or bottom plates for blow moulds of plastic bottles. | |
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