This cobalt-based material, known as STELLITE®, offers remarkable resistance to extreme wear and temperature conditions. Its exceptional performance results from the precise composition of the CoCr matrix, enriched with dispersed carbides. Our balls are supplied in passive state, using only virgin raw materials to guarantee their quality. Marteau- Lemarie, with more than 40 years of expertise, assures you a quick availability from our stock in France.
Chemical composition of stellite® 20 ball
| Element | type | C | If | Mn | Cr | Neither | Mo | Co | W | B | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| % | Satellite 20 | 1,90-2,95 | 1.50 max | 1.00 max | 31,00-35,50 | 3,00 max | 1.00 max | balance | 16,50-19,50 | max. 0.30 | 3,00 max |
Physical characteristics of the stellite® 20 ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 8.8 | g/cm3 |
| Young Module | 230 | GPA |
| Thermal expansion coefficient | 10 (DT=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 14.5 | W/m·K |
| Electrical resistivity | 3800 | × 10 - 9 D·m |
| Specific heat | 450 | J/kg·K |
| Relative magnetic permeability | max 1,200 | — |
| Magnetic behaviour | Paramagnetic | — |
Hardness and mechanical resistance of stellite® 20 ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 54-61 | HRC |
| Tensile failure load | 500-600 | MPa |
| Tensile failure load | 72-87 | psix10^3 |
| Exercise temperatures | 0/1000 | ° C |
| Exercise temperatures | 32/1832 | °F |
Available diameters and grades for stellite® 20 ball
| Parameter | Value |
|---|---|
| Minimum diameter | 9.5 mm — 3/8′′′ |
| Maximum diameter | 75 mm — 3′′ |
| Grades available | G25-50-100 |
| Precision standards | ISO 3290 / AFBMA |
Corrosion resistance of stellite® 20 ball
Good corrosion resistance in contact with oxidizing agents (except reducing acids), nitric, phosphoric and formic acids under non-extreme conditions of concentration and temperature, sulphuric acid at room temperature.
Applications of the smart ball® 20
Special bearings, pumps and valves where high wear, corrosion and temperature resistance characteristics are required.
