The use of aluminum in the automotive industry continued to increase since the
year 1980, in particular aluminum alloy used for the manufacture of pistons, engine
blocks, cylinder heads and valves. In this study uses the former gasoline engine piston
waste recycled into the piston Daihatsu Hi-Jet 1000with the addition of ADC 12 and insert
ST 60 and cast iron. Former Piston who has the composition 84.19 wt% Al, 10,7 wt% Si,
plus material ADC 12 with insert stainless steel which is used as a ring groove piston with
gravity casting process in the pouring temperature of 700
o
C
The specimens obtained from the casting material above which is a prototype of the
piston with insert. The results include the test composition, microstructure, macro-and
micro-hardness, shear test. The results of the most high-Si alloy composition on the
composition of 25% piston former plus 75% ADC 12 and ADC 12 pure. Show the bonding
of microstructure morphology best at the lowest temperature pouring with insert stainless
steel that has the smallest layer interface and a good bond. Macro and micro hardness
ADC 12 hardness highest on the composition of pure and pouring temperature of 700
o
C
with hardness 156,1 HVN and 81,4HRB. The highest shear strength of 28,50 MPa at
stainless steel pouring temperature of 700
o
C.
