304 Stainless Steel, 316 Stainless Steel
UNS S30400, UNS S31600
The advantage of strain-hardened stainless fasteners is greater strength with equivalent corrosion resistance. Strain-hardened parts have the same chemistry as their non-strain-hardened counterparts. Generally, a strain-hardened stainless bolt has the same strength as a Grade 5 steel bolt. Cold working a larger diameter bar into a smaller diameter bar is the usual method used to obtain the strain-hardened properties. Excessive heat will destroy the strain-hardening. 304 and 316 Stainless are the two most common materials that are available, which have undergone this process. Other austenitic stainless can be subjected to strain hardening, however, the raw material is subject to limited availability.
Strain-Hardened Stainless Fasteners
- 304 Bolts: ASTM A193 Grade B8 Class 2
- 304 Nuts: ASTM A194 Grade 8 Class 2
- 316 Bolts: ASTM A193 B8M Class 2
- 316 Nuts: ASTM A194 Grade 8M Class 2
Material Properties: 304 Stainless
Material Properties: 316 Stainless>
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