I am not currently rolling the threads, why would I need to roll the threads when using STST, is this normally the case ??
However I do bead blast to help with fatigue etc... I have seen similar products to mine that are not bead blast and the threads have been undercut normal UNF form
I use...
No I wouldn't be Zinc Passivating the STST, I currently use EN32B which we do Zinc Pass in Gold........ But it's interesting to hear about the nitric acid passivations etc.. Always willing to learn more.
What's KSI ? I am unfamilier with this term.
Also I have looked at Duplex and super duplex, they appear to have excellent qualities, however, what are the fracture and fatigue qualities, I couldn't find any results for the duplex range of STST's.....
Hi,
Thanks for the reply, it is machined from 5/8"bar, with a 1/2" dia stepdown, then stepping down to 7/16unJf using EN32B (approx 460N/mm^2) steel I calculate that the core is 0.3762" 9.556mm
:- CSA = (pi*D^2)/4 = 71.71mm^2 :- culminating in about 3360Kg Of tensile load... I understand that...
Hi,
Firstly appologies if this is in the wrong area.... :-(
Ok now my questions, I have been making steel suspension parts for racing for some years, however I have just been asked to make a set out of stainless steel for a road car ? I have always "shied" away from STST because of stress...