Manufacturing – Casting methods - European Aluminium Association
Manufacturing – Casting methods - European Aluminium Association
Manufacturing – Casting methods - European Aluminium Association
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1.7.5 Common and special purpose HPDC alloys<br />
Al18Si (AA 391) Hypereutectic, Parent Alloy, 2-Stroke Engine Bore<br />
Source: Mercury Marine Ltd.<br />
Macro section showing entrained air frozen into a high pressure die cast part<br />
Entrained Air makes HPDC parts non-heat treatable. Air bubbles entrapped under high<br />
pressure during solidification will cause HPDC parts to blister during solutionising.<br />
Common Al Die casting Alloys:<br />
AlSi8Cu3 (AA 380)<br />
Rp0.2%=160 MPa, Rm =325 MPa, A5=0.5-3%<br />
AlSi10Cu (AA 383)<br />
Rp0.2%=150 MPa, Rm =310 MPa, A5=1-3%<br />
These are the most common alloys in use for general-purpose die castings.<br />
General utility castings, transmission cases, blocks etc.<br />
Caution: HPDC Properties are very process/part dependent; only typical as-cast values<br />
are shown.<br />
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