Aluminium balls are characterized by good corrosion and wear resistance, as well as low weight. Excellent surface finish. The 3xxx series alloys are not heat treated and have mechanical characteristics slightly higher than the 1xxx series. The balls are delivered to passivity.
Chemical composition of the aluminium alloy ball 3XXX series
| Element | type | If | Fe | Mn | Cu | Al | Zn |
|---|---|---|---|---|---|---|---|
| % | 3003 | Max. 0.60 | 0,70 max | 1,00-1,50 | 0,05-0,20 | balance | max 0.10 |
Physical characteristics of the 3XXX series aluminium alloy ball
| Ownership | Value | Unit |
|---|---|---|
| Density | 2.73 | g/cm3 |
| Young Module | 69 | GPA |
| Thermal expansion coefficient | 23.5 (DT=0-100°C) | × 10−6 /°C |
| Thermal conductivity | 178 | W/m·K |
| Electrical resistivity | 37 | × 10 - 9 D·m |
| Specific heat | 893 | J/kg·K |
| Relative magnetic permeability | 1,004 | — |
| Magnetic behaviour | Paramagnetic | — |
Hardness and mechanical strength of 3XXX series aluminium alloy ball
| Ownership | Value | Unit |
|---|---|---|
| Hardness | 25-55 | HV |
| Tensile failure load | 130-170 | MPa |
| Tensile failure load | 19-24 | psix10^3 |
| Exercise temperatures | -196/200 | ° C |
| Exercise temperatures | -320,8/392 | °F |
Available diameters and grades for aluminium alloy ball 3XXX series
| Parameter | Value |
|---|---|
| Minimum diameter | 1 mm — 3/64′′′ |
| Maximum diameter | 150 mm — 6′′′ |
| Grades available | G100-200-500-1000 |
| Precision standards | ISO 3290 / AFBMA |
Corrosion resistance of 3XXX series aluminium alloy ball
The 3xxx series alloys have a corrosion resistance slightly lower than the 1xxx series. Good resistance in corrosive atmospheres, they are particularly resistant to corrosion by bites (except in the presence of chlorides).
Applications of the aluminium alloy ball 3XXX series
Ball bearings, valves used in the automotive industry (safety devices), electronic, in welding processes.
