Magnetic Properties:

All austenitic stainless steel balls are typically non-magnetic; however, some magnetism may become evident after cold working. Standards: ISO 3506 GB/T 3098.6 Characteristics of magnetization for various materials, also applicable to stainless steel. Complete non-magnetism is only possible under vacuum conditions. The measurement of material magnetization in a magnetic field is relative to the material's magnetic permeability μr in a vacuum. If μr is close to 1, the material has low magnetic permeability. For example: A2: μr ? 1.8, A4: μr ? 1.015, A4L: μr ? 1.005, F1: μr ? 5.

The strength of magnetism is closely related to the alloy composition of the steel. The following formula calculates magnetism (smaller values represent lower magnetism): MD30=551-462×(C+N)-9.2×Si-8.1×Mn-13.7×Cr-29×(Ni+Cu)-18.5×Mo