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The magnetic attraction of ferromagnetic ferritic martensitic and duplex stainless steels is compared to that of the low magnetic permeability austenitic types.
Austenitic stainless steels are usually described as 'non-magnetic' since their response to a hand-held magnet is negligible. However, ferritic, martensitic, duplex and most precipitation hardening stainless steels are usually classified as 'magnetic' since they exhibit a strong response (or pull) to a hand-held magnet. Relative magnetic
Ferritic, martensitic, duplex (and most precipitation hardening) stainless steels are usually classified as 'magnetic' since they exhibit a strong response (or pull) to a hand-held magnet. By comparison, austenitic stainless steels are often described as 'non-magnetic' since their response to a hand-held magnet is negligible. Relative
Austenitic stainless steels are generally non-magnetic with magnetic permeabilities of around 1.0. Permeabilities above 1.0 are associated with the amount of either ferrite or martensite phases present in the 'austenitic' steel and so depend on:
Ambient temperature physical properties of stainless steels to BS EN 10088-1 Ambient temperature physical properties, including density, modulus of elasticity (Young's modulus), coefficient of thermal expansion, thermal conductivity, specific heat (heat content or heat capacity) and electrical resistivity for a range of ferritic, martensitic, austenitic and duplex stainless steel types are tabulated. Some explanation of the units used for these properties is given.