The minimum section thickness which can be cast is proportional to the total surface area. However, other factors must be taken into consideration, including:
- The fluidity of the chosen alloy
- The metallurgical quality required
- The complexity of the casting
Where minimum sections are specified, particular attention must be paid to radii, taper, tolerances and changes of section. Tolerances and minimum section thickness is variable depending on the casting process such as: Sand Casting, Die Casting and High Pressure Die Casting.
Metal Thickness: Aluminium & Zinc Sand Castings

Metal Thickness: Aluminium & Zinc Gravity Die Castings

Metal Thickness: Aluminium Pressure Die Castings

Metal Thickness: Zinc Pressure Die Castings

Metal Thickness: Copper Alloy Sand Castings

Notes for Designers of Non-Ferrous Castings
DOWNLOAD NOW Guides
HOW can MRT Castings help you?
I want...
- Select what you need
- a complete solution
- to develop a new component from initial concept
- advice on what processes are best suited to my component
- prototypes before committing to production tooling
- to re-shore production to the UK from overseas
- a new supplier to use existing tooling
- to convert a machined from solid part to a casting
- a supplier who can meet stringent quality requirements
New at MRT Blogs
Manufacturers’ organisation Make UK has named our Managing Director Phil Rawnson in its 130 Honours list.
Read MoreDigital Transformation at MRT Castings
16th Apr 2026
At MRT, we’ve always prioritised the adoption and application of new technology.
Read MoreA sincere thank you to everyone who visited MRT’s stand at Southern Manufacturing & Electronics 2026 at Farnborough International in February.
Read More




