The minimum wall thickness for sand casting varies depending on the material.
Below are the critical wall thickness ranges for major casting alloys:
Gray Cast Iron
Critical wall thickness: 3 – 5mm
Minimum wall thickness: Usually 3mm; values below this may result in incomplete filling defects.
Ductile Iron
Critical wall thickness: 4 – 8mm
Requires ensuring molten iron fluidity and shrinkage compensation.
Aluminum Alloys
Critical wall thickness: 2 – 4mm
Specific values vary depending on alloy composition.
Copper Alloys
Critical wall thickness: 3 – 6mm
Slight variations depending on the type (e.g., tin bronze, brass).
Cast Steel
Critical wall thickness: 8 – 15mm
High melting point results in poor fluidity, requiring greater wall thickness.
Magnesium Alloys
Critical wall thickness: 2 – 5mm
To prevent oxidation and ensure molding quality.
Titanium Alloys
Critical wall thickness: 5 – 10mm
To accommodate its special physical and chemical properties.
Zinc Alloys
Critical wall thickness: 1.5 – 3mm
Low melting point and good fluidity allow for thinner wall thicknesses.
Nickel Alloys
Critical wall thickness: 6 – 12mm
High-temperature performance requires uniform microstructure.
The above are the wall thickness ranges for sand castings. Different metals have different wall thickness requirements. If you have a large-volume sand casting customization need, you can choose to cooperate with Mulan Metal. Mulan Metal has 12 years of experience in sand casting production and processing, and has helped customers from over 30 countries complete various sand casting projects, receiving consistent positive feedback. We look forward to your cooperation inquiry.
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