Deep-Drawn Magnetic Isolation Sleeve
The magnetic isolation sleeve for a solenoid valve is typically deep drawn from a stainless steel disc, 0.1–0.3 mm thick. At that gauge, the material is extremely thin, which makes the deep drawing operation genuinely tricky to hold tolerances on.
Case Review
Stainless steel is a solid choice for magnetic sleeves: it gives you good corrosion resistance, consistent mechanical properties, and the magnetic permeability you need. The usual grades are 304 and 316—both have enough strength and ductility to handle deep drawing without cracking or excessive thinning.