Al Si 12 (4047) is a high silicon alloyed aluminium welding wire for welding Al-Si alloys with more than 7% silicon content. Thanks to its low melting temperature, that minimize parent metal distortions, Al Si 12 is very often used to braze cast aluminium components, wrought alloys, extrusions and sheets. When used with flame torch, it�s recommended to use the alloy with our flux KIROBRASAL or KIROBRASAL NEUTRO. This alloy has excellent flow characteristics. Al Si 12 is not recommended when anodising is required.