AA 4032 Aluminum Alloy
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Family: Aluminum Alloy
Silicon Alloy (Al-Si). AA designation 4032.
Overview
Formulated for parts that run hot, AA 4032 is a high-silicon aluminium alloy of about 12.2% silicon with copper, magnesium, and nickel additions. The silicon gives excellent wear resistance and lowers the coefficient of thermal expansion, which helps maintain tight piston-to-cylinder clearances at temperature. It is forged into automotive and aircraft engine pistons, cylinder liners, and other thermal-management components.
Performance Ratings
Performance Radar
Composition
Mechanical Properties
| Tensile Strength | 360.5 MPa |
| Yield Strength | 342.5 MPa |
| Elongation | 4.0% |
| Hardness (Rockwell) |
Chemical Composition
| Element | Percentage (%) |
|---|---|
| Al | 85.091 |
| Cr | 0.01 |
| Cu | 0.9 |
| Fe | 0.174 |
| Mg | 1.04 |
| Mn | 0.005 |
| Ni | 0.9 |
| Si | 11.56 |
| Ti | 0.044 |
| Zn | 0.044 |
Where to Buy AA 4032 Aluminum Alloy
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Description
AA 4032 is a high-silicon aluminum alloy (~12.2% Si) with additions of copper, magnesium, and nickel, specifically formulated for forged pistons and engine components operating at elevated temperatures. The silicon content provides excellent wear resistance and reduces the coefficient of thermal expansion, critical for maintaining tight piston-cylinder clearances. Primary applications include automotive and aircraft engine pistons, cylinder liners, and thermal management components.