Product information Are all stainless steels non-magnetic? No. The austenitic or 300 series stainless steels are generally non-magnetic but high levels of cold work can make them somewhat magnetic. Castings made out of these stainless steels can also be somewhat magnetic. This slight magnetism is not an indication of a problem with the stainless steel. Other stainless steels families are naturally magnetic (e.g. ferritic 400-series and duplexes). Chemical Formula Chromium 17-19%, Nickel 8-10%, Manganese 2%, Silicon 1%, Carbon .15%, Phosphorus .045%, Sulfur .03%,