Grain Flow Comparison-FORGED BAR-MACHINED BAR-CAST BAR—It depend on products where will be used
A forged bar contains a directional alignment that is oriented in the direction to achieve maximum strength. This grain flow will yield ductility and resistance to impact and fatigue.
A machined bar contains a unidirectional grain flow due to the changes in contour and exposed grain on the ends. This is more prone to fatigue and more sensitive to stress corrosion cracking
A cast bar contains no grain flow or directional strength.