356 Aluminum Sand Castings Foundry | LB Foundry

A356 & 356 Aluminum Sand Castings

Aluminum alloy A356.0-T6 and 356.0 are a 7% Si, 0.3% Mg alloy with 0.2 Fe (max) and 0.10 Zn (max). The alloys have very good casting and machining characteristics. Typically they are used in the heat-treated condition of T5 and T6 hardness properties.

T5 & T6 Heat Treatments

There are two heat treatments for A356, T5 and T6. T5 heat treatment is the simpler option for our castings where the aluminum extruded is allowed to naturally cool.

Our T6 heat treatment of A356 auminum castings are more complex and requires 2 steps. After the castings are allowed to 535.0 (Almag 35) F 40 20 70 27 713.0 (Tenzaloy) F or T5 34 23 75 265

Chemical Composition (%)

319.0 3.5 6      
355.0 1.3 5 0.5    
356.0   7 0.3    
A356.0   7 0.3   Fe 0.2 max
A357.0   7 0.6   Ti 0.1 Be 0.06
535.0 (Almag 35)     6.9   Be 0.005
713.0 (Tenzaloy) 0.7   0.4 7.5  

Typical Applications

319.0 Engine crankcases, gas and oil tanks, engine oil pans, engine parts.
355.0 Air compressor pistons, printing press, water jackets & crankcases.
356.0 Flywheel castings, automotive transmission cases, oil pans, pump bodies.
A356.0 High strength airframe and space frame structural parts, machine parts, truck chassis parts, high velocity blowers and impellers.
A357.0 High strength aerospace castings.
535.0 (Almag 35) High strength alloy used for electronic equipment, aircraft components and parts requiring a high degree of dimensional stability and strength. Superior ductility makes it an excellent replacement for malleable iron. No heat treat required.
713.0 (Tenzaloy) Automotive parts, trailer parts, pumps & mining equipment.

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