Decision Aid

Aluminum Alloy Selection

Practical guide to orient material selection according to use and constraints.

Choosing the Grade According to Requirement

The choice of aluminum alloy depends on the part's requirements: mechanical properties, corrosion resistance, geometric complexity, thermal behavior, machinability, sealing, and manufacturing process.

Your Requirement	Recommended Grade	Advantages	Suitable Processes	Typical Applications
Common Mechanical Part	AlSi7Mg0,3 (EN AC-42100)	Good overall compromise; ease of implementation; good machinability	Sand casting, gravity die casting, low-pressure die casting	Casing, flanges, supports, housings, structural parts
Complex and Thin Part	AlSi12 (EN AC-44100)	Excellent fluidity; very good filling of thin shapes; good dimensional stability	Gravity die casting, low-pressure die casting, core making	Casing, covers, thin housings, pumps, complex parts
Good Sealing	AlSi9Cu3(Fe) (EN AC-46000)	Very low porosity; good sealing; good pressure behavior	Low-pressure die casting, sand casting, gravity die casting	Engine parts, pump bodies, compressors
Hot Strength	AlSi10Mg (EN AC-43000)	Good temperature resistance; dimensional stability; good mechanical strength	Gravity die casting, low-pressure die casting	Engine parts, cylinder heads, casings, manifolds
Marine / Corrosive Environment	AlMg5 (EN AC-51200)	Excellent corrosion resistance; good weldability; low density	Sand casting, gravity die casting	Naval structures, coastal equipment, tanks, supports
High Mechanical Strength	AlCu4Ti (EN AC-21100)	High mechanical strength; good hot strength; excellent stability	Sand casting, gravity die casting, core making	Structural parts, stressed parts, critical components
Good Machinability	AlSi7Mg0,3 or AlSi10Mg	Excellent machinability; good surface finish after machining	Sand casting, gravity die casting, low-pressure die casting	Machined parts, flanges, supports, technical housings