300 Series Aluminum Sand Casting Alloys

Our aluminum sand foundry pours many of the 300 series aluminum alloys. These include the 355, 356, and A356 aluminum alloys which are excellent for pressure type applications such as air flow pipes and elbows, liquid flow pipes and elbows, housings and gearboxes. The high fluidity of these aluminum alloys also lends themselves to thin wall aluminum castings. Depending on the size and casting design wall thicknesses down to 0.156" can be sand cast using the 300 series aluminum alloys.

The 355, 356, and A356 Series aluminum alloys can be either T5 or T6 heat treated and also machined through our affiliate Alcast Company

Aluminum Sand Casting Alloy 355

Aluminum sand casting alloy 355 uses copper to greatly improve its strength over the more common aluminum casting alloy A356. The 355 aluminum alloy is great for pressure tight applications and the alloy also maintains its strength at higher temperatures than A356

Aluminum Sand Casting Alloy 356

Aluminum alloy 356 has excellent casting characteristics and corrosion resistance along with good machinability and weldability. Common products manufactured from sand cast aluminum alloy 356 in our aluminum foundry include transmission cases, flywheel housings, oil pans, brackets along with various fittings and pump bodies.

Aluminum Sand Casting Alloy A356

Sand cast aluminum alloy A356 has higher strength and ductility than 356 because the levels of impurities are lower in the A356 aluminum alloy. A356 aluminum castings cost a little more but are great for machine parts, chassis parts, along with other structural parts requiring high strength or pressure tightness