TMC’s CleanTop® Optical Top, available in a “non-magnetic” construction, is recommended for applications requiring the support of a high-strength magnet or the maintenance of a homogenous magnetic field.
Though no alloy of stainless steel can be 100% non-magnetic, the lower iron content of the 300 series alloy allows reduction in ferromagnetic properties. Alloys are available with even less ferromagnetism than 304 alloy such as 316 L, but 304 is generally considered to be the best price-to-performance trade-off for a non-magnetic table. For a discussion of other alloys, contact TMC.