IMHO, I would NOT replace the bolts with stainless steel ("SS"). While
some SS bolts may look nice and have an "anti-rust" appeal, there is one
major drawback that one must consider when replacing a bolt... strength!
Stainless is a series of alloy steels which contain at least 12% chromium.
Such steels will not rust when exposed to weather. The most common
stainless steel is 304 which is an 18-8 alloy containing at least 18% chromium
and 8% nickel. 304 is a non magnetic steel. The metric
designation for 304 is A-2. Even more corrosion resistant alloys, such as
316, are available for high corrosion environments such as marine use.
Because stainless steel is softer than other steels (it only seems harder
because it work-hardens) it tends to gall or wear prematurely. Overall, SS
bolt are rated Grade 2, sometimes 5, while SAE stardand is grade 8. When
it comes to the engine compartment... items subject to considerable heat
and vibration - use SAE 8.
Check out http://www.waukeshafoundry.com/antigall.htm for a picture.
A remember to always use anti-Seize or a similar product on the threads
;-)
________________________
Corey Sherman
corey.sherman@rcn.com
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