View Full Version : Stainless steel bolt grades & strength

05-24-2012, 01:39 PM
Are stainless steel bolts stronger than a grade 5 or grade 8 bolt. Stainless bolts commonly are grade 18.8...is this number bolt strength or some type of corrosion rating:confused:

05-24-2012, 02:11 PM
Common stainless bolts are generally not as strong as grade 8, but about as strong as Grade 5. 18-8 is the alloy (304), not grade (18% Cr and 8% Ni). There are some stainless steels that are very strong. ARP sells bolts that exceeed Grade 8 at 170,000 PSI strength. They are precipitation hardened 17-4 alloy.

Be careful where you use stainless bolts, and what type you use.