Low pressure Die Casting is a development of the permanent mould process in which metal is introduced into the chill mould from below. Gas pressure holds the metal in the die until its solidifies. As with high pressure die casting, the process requires complex plant and equipment.

Overall, the process is repeatable and may be automated. Undercut's can be incorporated into the component with the use of Sand Cores. Production rates are fair, but not as good as high pressure. Minimum wall thickness are as little as 2 to 3mm. Low pressure die casting offers high yields in excess of 90% as risers and runners are limited, also reducing fettling and trimming costs. Pore free castings are obtainable and machine size will limit the size of castings.
Surface finishing and minimum wall thickness are both better than gravity casting, but poorer than high pressure die casting.