What aluminum alloy is best for casting?
2026-05-07
There is no single “best” alloy — selection depends on application, strength, heat treatment, and cost. The most popular and versatile casting aluminum alloys include:- ADC12: Most common for die casting; good fluidity and castability; tensile strength ~200 MPa; widely used in housings, brackets, automotive parts.
- A356 / A357: Best for heat-treatable, high-strength parts; excellent ductility and pressure tightness; widely used for wheels, pump bodies, structural components; T6 treatment achieves tensile strength up to280–320 MPa.
- A380: High strength, good pressure tightness; ideal for hydraulic parts, engine components; tensile strength ~240 MPa.
- AlSi12: Excellent corrosion resistance and castability; used for thin-walled parts and marine components.
For general mass production, ADC12 is the most cost-effective. For high-performance structural parts, A356 T6 is the industry standard.
- A356 / A357: Best for heat-treatable, high-strength parts; excellent ductility and pressure tightness; widely used for wheels, pump bodies, structural components; T6 treatment achieves tensile strength up to280–320 MPa.
- A380: High strength, good pressure tightness; ideal for hydraulic parts, engine components; tensile strength ~240 MPa.
- AlSi12: Excellent corrosion resistance and castability; used for thin-walled parts and marine components.
For general mass production, ADC12 is the most cost-effective. For high-performance structural parts, A356 T6 is the industry standard.
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