Designed in copper and beryllium alloy, these balls stand out for their robust mechanical properties and outstanding electrical conductivity. They are ideal for applications requiring increased wear resistance and reliability under demanding conditions. With over 40 years of expertise, Marteau-Lemarie assures you a quick availability and personalized advice from our stock in France.
Chemical composition of copper-beryllium alloy ball
| Element | type | If | Cu | Al | Be | Co+Ni | Co+Ni+Fe |
|---|---|---|---|---|---|---|---|
| % | CuBe2/C17200 | 0.20 max | balance | 0.20 max | 1,80-2,00 | 0.20 min | Max. 0.60 |
Physical Characteristics of Copper-Beryllium Alloy Ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 8.3 | g/cm3 |
| Young Module | 127 | GPA |
| Thermal expansion coefficient | 13.5 (DT=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 105 | W/m·K |
| Electrical resistivity | 80 | × 10 - 9 D·m |
| Specific heat | 400 | J/kg·K |
| Relative magnetic permeability | 1,0025 | — |
| Magnetic behaviour | Paramagnetic | — |
Hardness and mechanical resistance of copper-beryllium alloy ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 40-45 | HRC |
| Hardness | 390-450 | HV |
| Tensile failure load | 1200-1600 | MPa |
| Tensile failure load | 174-232 | psix10^3 |
| Exercise temperatures | -196/260 | ° C |
| Exercise temperatures | -320,8/500 | °F |
Available diameters and grades for copper-beryllium alloy ball
| Parameter | Value |
|---|---|
| Minimum diameter | 1 mm — 3/64′′′ |
| Maximum diameter | 100 mm — 4′′ |
| Grades available | G50-100-200-500-1000 |
| Precision standards | ISO 3290 / AFBMA |
Corrosion resistance of copper-beryllium alloy ball
Cu-Be alloy is resistant to corrosive seawater attacks, neutral saline solutions and petroleum products. Moderately resistant to aqueous sodium hydroxide solutions. Do not resist in ferric chloride, sulphides, organic and inorganic acids strong in oxidizing environment, ammonium hydroxide, ammonia vapours, molten metals. Avoid contact with acetylene (possible explosive reaction).
International Standards for Copper-Beryllium Alloy Ball
| ITA | USA (AISI) | DIN (GER) | AFNOR (FRA) | UK | GOST (RUS) | GB (CHN) | JIS (JPN) |
|---|---|---|---|---|---|---|---|
| CuBe2 | C17200 | 2.1247 | CuBe1.9 | CB101 | BrB2 | QBe2 | C 1720 |
Applications of copper-beryllium alloy ball
Special/low maintenance bearings, electrical/electronic connectors, applications in aggressive environments.
