Non-rust OEM fasteners

[nbpt100]

Tensile strength is simply the maximum tensile stress the material can take before it ruptures. You also have properties like yield strength, modulus of elasticity, fatigue life. While there is obvious correlation between all of those properties and ultimate tensile strength, it's not 1:1, and those properties do matter in many applications. Many SS alloys are very prone to work hardening, which could be problematic in a highly stressed bolt.

Stainless steel can also have galvanic corrosion with dissimilar metals (the not stainless metal will corrode more aggressively), and stainless bolts being tightened into stainless nuts will often result in severe galling and the threads basically cold-welding together.

I am only trying to understand any particular issues that you may be getting at. I agree that work hardening can be an issue in some applicaitons. Reverse bending applications may fatigue more, Like in a rotatingshaft or a spring. I get all that. The modulus of elasticity is pretty close to all steels. Anti sieze helps to prevent thread galling. It is a work around I mentioned that in one of my previous comments.

The electronegativeity difference with aluminum is high. So that is good to avoid.

For years I have used stainless fasteners on ODPE as substitutes for grade 2 or 5 and have seen overall improvements in rust issues. That is why I continue to do it. Snow blowers in particular which deal with a lot of salt and water. I often use anit sieze and have fewer issues over all. As I mention earlier I use them on exhaset systems incase I need to disassemble in the future. Well worth the extra coulpe of bucks. Just my personal experience and observations.