Aluminium alloy casting having high laser weldability, joint of aluminium alloy casting and method for improving aluminium alloy cast structural member

摘要

An aluminum alloy casting is provided high weldability by consisting of 3.5 to 12.0 Wt% of Si and hydrogen in a limited content to be less than or equal to 0.3 cc per 100g of alloy. The aluminum alloy casting thus has strength and ductility suitable for application to a joint for automotive frames.