Holy smoke, great standards! Try DIN next time! Joachim Fort Worth, Texas
> [Original Message] > From: Mark Langford <n5...@hiwaay.net> > To: KRnet <kr...@mylist.net> > Date: 5/7/2006 7:55:55 PM > Subject: Re: KR> stainless bolts > > NetHeads, > > Somebody mentioned using stainless bolts for wing attach fittings the other > day. That may or may not be OK, but you need to do your homework first. > Most of the stainless bolts I see in the Wicks catalog are 431, which > depending on how it was tempered, can be anywhere between 100ksi and 150 ksi > tensile strength. Some stainless can approach 200 ksi, but the common stuff > like 304 is much weaker (like 30 ksi, weaker than 6061-T6 aluminum). > > Typical NAS bolts are 160ksi to 180 ksi. AN3 and AN6 bolts (what the plans > call for) are 125 ksi. What you have may be fine, and it may not. Just do > your homework for the exact material or spec that your bolts are made to, > and make sure they're strong enough. If you got them from the bargain bin > at the SNF flea market, all bets are off. > > And even the spec number may not be good enough in some cases, as some bolts > can be had in either carbon steel or stainless, with the only difference > being a dash and a letter at the end of the part number! > > Stainless bolts are something like 1% heavier than carbon steel bolts, so > weight is certainly not a good reason to swap them out. > > I'm with Larry though... replace 'em every 10 years if it worries you. > You'll take the wings off every few years anyway... > > Mark Langford, Huntsville, Alabama > see KR2S project N56ML at http://home.hiwaay.net/~langford > email to N56ML "at" hiwaay.net > > > _______________________________________ > Search the KRnet Archives at http://www.maddyhome.com/krsrch/index.jsp > to UNsubscribe from KRnet, send a message to krnet-le...@mylist.net > please see other KRnet info at http://www.krnet.org/info.html
