Features and applications of common stainless steel alloys

Austenitic stainless steel accounts for 85% – 90% of the stainless fasteners. It has the best corrosion resistance of stainless alloys; is non-magnetic before cold working; has low heat conductivity and good strength at higher temperatures; and is not hardenable by heat treatment.

Martensitic stainless steel accounts for about 5% of the stainless fasteners. Its no nickel content and high carbon content mean the lowest corrosion resistance of the stainless alloys and it is magnetic.

Ferritic stainless steel accounts for only a few percent of the stainless fasteners. Its high chromium content helps corrosion resistance, and it is magnetic and cannot be hardened by heat treatment.