Shenzhen Alu Rapid Prototype Precision Co., Ltd.

The malleability of die-cast metal depends on the specific alloy used, as die casting typically involves metals like aluminum, magnesium, zinc, or copper-based alloys. Malleability refers to a material’s ability to be deformed under compressive stress (e.g., hammered or rolled into thin sheets) without cracking. Here’s a concise overview:

Aluminum Alloys (e.g., A356, A380):

Low Malleability: Aluminum die-cast alloys are generally not very malleable due to their high strength and relatively low ductility. They are brittle compared to pure aluminum, with elongation typically ranging from 1–5% (depending on the alloy). This makes them prone to cracking if deformed extensively post-casting.

Reason: Die-cast aluminum contains additives like silicon, magnesium, or copper to improve strength and castability, which reduce malleability.

Applications: Used for rigid, lightweight parts like automotive components or housings, where strength and precision are prioritized over malleability.

Zinc Alloys (e.g., Zamak 3, Zamak 5):

Moderate to High Malleability: Zinc alloys are more malleable than aluminum, with elongation values of 5–10%. They can withstand some deformation without fracturing, making them suitable for parts requiring minor post-casting forming or bending.

Reason: Zinc’s lower melting point and inherent ductility allow for better malleability, even in die-cast form.

Applications: Common in small, intricate parts like connectors, fittings, or decorative hardware.

Magnesium Alloys (e.g., AZ91D):

Low to Moderate Malleability: Magnesium alloys have limited malleability, with elongation around 3–8%. They are less ductile than zinc but can tolerate some deformation under controlled conditions.

Reason: Magnesium’s hexagonal crystal structure restricts plastic deformation, though alloying improves it slightly.

Applications: Used in lightweight structural parts (e.g., laptop frames, automotive components).

Copper-Based Alloys (e.g., Brass, Bronze):

Moderate Malleability: These alloys are more malleable than aluminum or magnesium, with elongation up to 10–20% in some cases. They can be deformed to a degree but are less common in die casting due to higher costs and melting points.

Applications: Used in plumbing fittings or electrical components.