| The materials that offer the highest resistance to heat and corrosion are alloy steels, especially austenitic steel. |
| Metal O-Rings and and some Spring Energized C-Rings made from austenitic stainless steels, are not precipitation hardenable. |
| The appearance and composition of the nitrocarburized layers of these austenitic steels differs significantly from that of martensitic steels. |
| They exhibit an austenitic matrix, although several grades also contain some ferrite. |
| One significant difference between the cast and wrought stainless steels is in the microstructure of cast austenitic stainless steels. |
| These steels have an austenitic microstructure and they are nonmagnetic. |
