AlSi Alloy Auto PartsGeneral DescriptionNowadays silicon aluminum alloys(AlSi alloys) are applied in many technical areas. Due to the low specific weight, high corrosion resistance and outstanding technological properties, AlSi alloys are widely used in automotive,motorcycles and military industry, for example, rotors, engine pistons, cylinder liners, intake valves, valve seats etc. Many famous automotive companies,such as Mercedes-Benz,Mazda,BMW,Fords etc have adopted AlSi alloys in engines. Baienwei adopts advanced rapid solidification technology and specializes in the production of AlSi alloys.The materials have many features in terms of,for example,high strength,wear-resistance,good formability,low density and high temperature strength. |
Grade |
Si content wt% |
Condition | Density g/cm³ |
CTE 25℃ ppm/℃ |
Tensile Strength MPa | Yield Strength MPa | Elongation % | Hardness HV30 |
Elastic Modulus GPa |
AlSi17 | 17% | T6 | 2.83 | 18 | 486 | 412 | 0.5 | 181 | 91 |
AlSi20 | 20% | F | 2.78 | 17 | 335 | 206 | 2.7 | 106 | 96 |
AlSi25 | 25% | T6 | 2.64 | 16.9 | 480 | 441 | 0.7 | 190 | 96 |
High strength | Low density |
High Modulus of Elasticity | Low CTE |
High wear resistance | Good Formability |
High corrosion resistance | Good vibration dampening |
High thermal conductivity | Good machinability |
Low oil consumption | Low (or zero) emissions |