Stainless Steel Fasteners

When it comes to stainless steel fasteners the Bearing Man Group stocks an extensive range. Stainless steel fasteners materials are identified as the B8 class and are identified in the ASTM Specification A193/193M for Bolts, A194/194M (nuts) and F593 for Cap screws and studs. A stainless-steel fastener is a family of Iron-based alloys containing about 10.5% chromium or more plus other alloy elements such as nickel, sulfur, manganese, molybdenum, Selenium, and titanium etc.… chromium is the responsible for corrosion and heat resistance. There are 5 primary stainless steel fasteners classifications namely: Austenitic, Martensitic, Ferritic, precipitation hardening and Duplex with reference to its metallurgical structure. The 2 most common stainless-steel materials are 304 (A2-70) and 316(A4-70). All Standard and non-standard fasteners are available in stainless steel and will fall under the stainless-steel fasteners group at Bearing Man Group. An important fact to know about stainless steel Fasteners is its self-healing, when the fastener surface layer is damaged the chromium element will react in the presence of oxygen and the fastener will begin to repair itself. That is why it is important to understand this self-healing process because stainless steel when used in low-oxygen or oxygen-free surrounding, is susceptible to surrounding influences if the protective layer gets damaged.