Started 1 day, 23 hours ago (2009-12-23 10:18:00)
by metengr
teknomiks; Welding of quenched and tempered material must be performed with caution for the reason you mentioned. As a minimum, the
stress relief temperature would require to be below the original tempering temperature by at least 20 deg C to avoid changing the bulk mechanical properties of the base material (quenched and tempered). Beyond this other factors come into play like weld joint type...
Started 1 day, 22 hours ago (2009-12-23 10:23:00)
by CoryPad
I can't speak to
equivalency, but the only standards for these types of parts that I am aware of are the IFI 5XX series. You can search here: http://www.indfast.org
Started 3 days, 13 hours ago (2009-12-21 19:55:00)
by unclesyd
In or on what and what is the environment?
Started 2 days, 20 hours ago (2009-12-22 13:01:00)
by metengr
rustbuster; PWHT is considered an essential variable for welding processes. IF you omit PWHT from a WPS that was originally qualified with PWHT you need to re-qualify a procedure. If you have qualified a WPS for
P-No. 8 base material with no PWHT and you decide to perform a solution anneal after welding this does not effect the original WPS/PQR. Why? Because solution anneal is an optional ...
Started 3 days, 19 hours ago (2009-12-21 14:01:00)
by metengr
What welding process are you using and
filler metal?
Started 1 week ago (2009-12-17 10:00:00)
by metengr
MitchYurko; If you are going to minimize distortion the key is to use circumferential stringer bead deposition and minimize start/stops. In other words use a spiral welding technique and once you start welding don't stop mid length. If you can use an automatic
welding machine this would be the preferred method. Regarding wall thickness, this will have less of an impact on reducing distortion....
Started 1 week, 5 days ago (2009-12-12 14:16:00)
by cntw1953
netzen: Based on my limited knowledge, fatigue strength of bolted connection is affected by many factors, such as type of jointed materials, load range and cycles. Please have a look on linked site, it might lead you to where you wanna to. Good luck. http://f indarticle s.com/p/ar ticles/mi_ qa5357/is_ 200411/ai_ n21359024/
Started 1 week, 4 days ago (2009-12-13 09:21:00)
by CoryPad
Eslock is a
polyamide thread patch. More information here: http://www.anochrome-group.co.uk/plastic_patch.asp In general, these offer limited performance advantage. If you need sealing and/or vibration resistance, then thread adhesives would be a better choice.
Started 1 week, 5 days ago (2009-12-12 13:08:00)
by ishvaaag
I have this same afternoon seen that allowance at
the Packer and Henderson 1992 guide of CISC that I didn't remember, and has surprised me since here throats were (Spain, by the EA-95 code) chosen so that sizes were always less than the thickness, for fillet welds. Anyway it is well sanctioned (for the referred 350 MPA=Fy steels) it seems since also Eurocode takes such approach. If you have ...
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