ADC12 and A380 are both common aluminum die casting alloys, but buyers should not treat them as interchangeable labels. The right choice depends on casting complexity, mechanical requirement, regional material preference, surface finishing and cost target.
A good alloy decision starts with the part function. A housing with many ribs and bosses, a heat sink base, and a machined mounting bracket may all be aluminum die castings, but their material priorities are different.
| Decision point | ADC12 | A380 | Buyer action |
|---|---|---|---|
| Best fit | widely used for housings, covers and general die casting parts | common for North American aluminum die casting projects | send both material preference and application requirement |
| Manufacturing risk | poor design can still create porosity or shrinkage | availability and standard should be confirmed with supplier | ask supplier whether the alloy is regularly used in production |
| Cost driver | usually practical for many China-based OEM projects | may change quotation depending on sourcing and specification | compare total cost including machining and finishing |
| Inspection focus | material confirmation, dimensions and surface finish | same checks, plus exact alloy standard confirmation | confirm material report requirement before order |
Huabo reviews alloy selection together with wall thickness, tooling flow, machining surfaces and surface treatment. If a buyer specifies A380 but the part function can be met with ADC12, the discussion should happen before quotation is finalized.
A material name alone rarely decides final cost. Mold complexity, CNC machining, coating and inspection often have more influence than the alloy price difference.
Include the alloy requirement, drawing standard, expected surface finish, annual quantity and any mechanical or environmental requirement.
Related reference: custom ADC12 aluminum die casting tray housing, aluminum die casting service and electronics die casting parts.
For many imported die casting projects, the buyer asks for ADC12 because it is familiar in Asian supply chains, while another buyer asks for A380 because the original drawing was made around a North American material callout. Neither request is wrong, but the better discussion is: which surfaces are machined, where the load is applied, whether the part is painted, and whether the casting has thick bosses next to thin ribs. A supplier who only answers "yes, we can cast it" has not yet checked the real project risk.
| Buyer question | Why it matters |
|---|---|
| Will the part be machined after casting? | Porosity near machined faces is more important than the alloy label alone. |
| Is the surface painted or left raw? | Flow marks, blister risk and pre-treatment should be reviewed early. |
| Is the drawing locked? | Draft, wall transition and ribs may decide whether the alloy performs well. |
If the drawing allows equivalent materials, ask the factory to state the proposed alloy, its standard, and the reason for the choice in the quotation. This creates a record that engineering, purchasing and quality can all review before mold approval.
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