A380 Aluminum Casting Alloy

Designations: A380.0 · UNS A13800 · EN AC-46500 (AlSi9Cu3(Fe))A380 is the most widely used aluminum die-casting alloy. About 8.5% silicon and 3.5% copper give it fluidity, pressure tightness and good as-cast strength, and its properties are published for die-cast parts. Kormax does not offer die casting. For sand or investment cast aluminum parts, A356 is the usual alternative, and Kormax casts A356 to order for customers in the United States and Canada.

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Chemical Composition

A380 Aluminum Casting Alloy — chemical composition, % by weight
Element	Symbol	Range / limit %
Silicon	Si	7.5–9.5
Copper	Cu	3.0–4.0
Iron	Fe	1.3 max
Zinc	Zn	3.0 max
Manganese	Mn	0.50 max
Magnesium	Mg	0.10 max
Nickel	Ni	0.50 max
Tin	Sn	0.35 max
Others, total	—	0.50 max
Aluminum	Al	Balance

Mechanical Properties

A380 Aluminum Casting Alloy — mechanical properties
Property	Metric	Imperial
Tensile Strength, typical	324 MPa	47 ksi
Yield Strength, typical	159 MPa	23 ksi
Elongation, typical	3.5%	3.5%
Hardness (Brinell), typical	80 HB	80 HB

Composition to Aluminum Association A380.0 (NADCA permits up to 0.30% magnesium for die casting). Mechanical properties are typical values for die-cast A380 (NADCA), not specified minima.

Need a cast aluminum part? Kormax casts A356 in sand and investment castings.

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Comparable and Related Specifications

The standards and grades below may have similar composition, properties or applications, but they should not be treated as direct equivalents without review. Chemistry, heat treatment, toughness requirements and testing provisions can differ between standards.