Hydraulic Ram Piston

APPLICATION	Hydraulic Ram Piston
SECTOR	Hydraulic and Pneumatic Manufacture
GRADE	Unibar 250 Unibar 300 Unibar 500 Unibar 600
SUITABLE TO REPLACE	Steel Sand Castings Aluminium
ADVANTAGES	Withstand high pressure (Unibar-500-7 & Unibar-600-3) Better machinability – self lubricating – chip generating Shorter deburring time Shorter distance between holes due to better machinability Good vibrational absorption No shrinkage or porosity Lighter than steel Finer grain structure than sand casting
COST SAVING	Much lower machining time Much lower deburring time Higher tool life due to self lubricating properties Higher machining speeds on delicate corners Cheaper than Aluminium No pattern costs No rejected parts No sand inclusions and other casting defects

Unibar Grade	Microstructure	Hardness [HB]	UTS [N/mm²]
Unibar 250	Graphite flakes in pearlitic / ferritic matrix	180 – 220	250
Unibar 300	Graphite flakes in pearlitic matrix	200 – 240	300
Unibar 500-7	Graphite nodules in ferritic / pearlitic matrix	180 – 230	500
Unibar 600-3	Graphite nodules in pearlitic matrix	200 – 260	600