Quote:
Originally Posted by
greatescape
so your observation about A4 being strong enough is reassuring.
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Just to be clear A2 and A4 are grades of stainless and refer to their stainlessness (A4 is more resistant to corrosion and is sometimes called marine stainless). However A4 has a higher tensile strength. Namrick only sell A4 but Toolstation/Screwfix mostly has A2
The tensile strength of A2 stainless is slightly higher than most mild steels but lower than 8:8 fastners - A4 is about the same as 8:8.
This article explains it quite clearly (it's aimed at VWs but applies to us as well):
http://www.volksbolts.com/faq/basics.htm
I have M10 bolts holding the four pot Brembo callipers on my Guzzi and have no concerns - but brake callipers may warrant some personal consideration but IIRC the calliper bolts on the XT aren't marked 8:8 so I wouldn't worry about those either. Everything else would be ok - perhaps the suspension relay arm may be worth giving a bit of thought to. I'd personally be happy using A4.