It is a relatively common belief that “stainless steel is non-magnetic”.
However this is not actually true and the real situation is much more complicated.
The degree of magnetic response or is derived from the micro-structure of the steel.
Stainless Steel is an alloy, containing both magnetic and non-magnetic materials.
The Iron(Steel) in the alloy is very magnetic, the Nickel added during creation reduces the level of magnetism, but it does not eliminate it.

So, a solid bar of freshly cooled Stainless Steel should have very little magnetism,
but the magnetism is also changed during any later forging and shaping.

So where the materials are then processed, pressed, drilled, or cut (e.g. to form fasteners) the micro-structure will again be altered increasing the levels of magnetism.
And once that occurs, magnetism can be increased further (e.g. by proximity to other magnetic materials) just like ‘normal’ steel would be.
We only obtain our materials from reputable UK suppliers, and can assure you that what is identified as Stainless Steel, can be relied upon to be Stainless Steel, and of the grade specified (e.g. A2 / A4 etc..).

​However, if you do require fully-austenitic (non-magnetic) stainless steel, e.g. for use in medical applications or highly magnetic environments such as MRI scanners, then you would need to contact a specialist supplier. Alternatively you could use an alternative material such as Aluminium.