Wear and Corrosion of Cast Al Alloy Piston with and without Brake Oil

Table 3

Hardness and strength properties of cast piston substrates.

Samples	HBN; Pnt 1	HBN; Pnt 2	HBN; Pnt 3	HBN; Pnt 4	Average HBN	Strength; (MPa)	Observation; (porosity, etc.)
Cast Al alloy; (CP-TS21)	63.4	64.4	64.1	63.3	63.8	226.49	Few pores