Features of Beryllium Copper
- Thermal Conductivity
- It has thermal conductivity of about 130 - 245W / m･℃ by each alloy, and it is used for applications requiring efficient heat dissipation.
- Hardness
- Due to precipitation hardening, it has a hardeness HRB98~ HRC40 which is comparable to steel material and has the highest strength in copper alloy.
- Electrical Conductivity
- It has conductivity of 32 ~ 58% IACS by each alloy, and it is used for applications requiring high current density.
- Corrosion Resistance
- Beryllium Copper has excellent corrosion resistance, nearly the same as Nickel Silver.
Forms, features and applications of
Beryllium Copper Products
| Features | Alloy | Trade Name | Forms | |
|---|---|---|---|---|
| Rod | Plate | |||
| High Strength Alloy | BeA-25 | ULTRA SUPRA II |
● | ● |
| High Conductive Alloy | BeA-11 | PLUS | ● | ● |
| Features | Alloy | Trade Name | Applications | ||
|---|---|---|---|---|---|
| Mold Products | Electrode | Aircraft Bushings | |||
| High Strength Alloy | BeA-25 | ULTRA SUPRA II |
● | ● | ● |
| High Conductive Alloy | BeA-11 | PLUS | ● | ● | - |
| Features | Alloy | Trade Name | Specifications | |||
|---|---|---|---|---|---|---|
| CDA | JIS | ASTM | RWMA | |||
| High Strength Alloy | BeA-25 | ULTRA SUPRA II |
C17200 | H3270 C1720 |
B196 | Class4 |
| High Conductive Alloy | BeA-11 | PLUS | C17510 | - | B441 | Class3 |
Chemical Composition and Properties of Beryllium Copper
Chemical Composition
| Composition | High Strength Alloy | High Conductive Alloy |
|---|---|---|
| BeA-25 ULTRA / SUPRA II |
BeA-11 PLUS |
|
| Be | 1.80 - 2.00 | 0.20 - 0.60 |
| Co | 0.20 - 0.35 | - |
| Ni | - | 1.40 - 2.20 |
| Cu | Bal. | Bal. |
Properties of Beryllium Copper
| Items | Unit | High Strength Alloy | High Conductive Alloy | ||
|---|---|---|---|---|---|
| BeA-25 | BeA-11 | ||||
| ULTRA | SUPRA II | PLUS | |||
| Physical Properties | Thermal Conductivity | W/(m･℃) | 130 | 145 | 245 |
| Electrical Conductivity | lACS% | 32 | 38 | 58 | |
| Specific Gravity | g/cm3 | 8.26 | 8.75 | ||
| Melting Points | ℃ | 865 - 980 | 1004 - 1070 | ||
| Coefficent of Thermal Expansion | (20 - 200℃) | 17.8*10-6 | 17.6*10-6 | ||
| Volume Resistivity | µΩ-cm | 6.0 - 7.8 | 2.9 - 3.4 | ||
| Specific Heat | (30 - 300℃) cal/g/℃ | 419 | 419 | ||
| Modulus of Elasticity | kN/mm2 | 127 | 132 | ||
| Magnetism (Permeability) |
µ(µ=1+4pk) | none (0.00) |
none (0.00) |
||
| Mechanical Properties | Hardness | Rockwell Scale | C 40 | C 32 | B 98 |
The above values are for design guidance only. And also they may vary slightly depending on the shape.
Thermal conductivity is a value calculated from measurements of electrical conductivity.
Relationship between Hardness and Thermal Conductivity
- Generally, high strength materials have low thermal conductivity.
- Beryllium copper not only has high strength but also high thermal conductivity, it efficiently dissipates heat.
Contact
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