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View Full Version : Is this common within Stromung Exhaust


Khoalty
12-04-2002, 12:01 AM
Its not an installer problem at all, it just fell off and I saw.
Everything was perfect until this happened, its just fell off.
Khoalty
12-04-2002, 12:03 AM
2
bimmer95
12-04-2002, 12:06 AM
Of course that is NOT common :rolleyes: I know guys running 5+ year old Stromung systems that are still perfect. Looks like the weld on that one was just not quite hot enough. Is Scott sending him a new one?
Khoalty
12-04-2002, 12:07 AM
3
Khoalty
12-04-2002, 12:09 AM
4
bimmer95
12-04-2002, 12:34 AM
Actually the weld looks like it held up fine, there's a chunk ripped out of the can. Has Scott (Stromung's owner) seen this? What did he say about it?
Khoalty
12-04-2002, 12:38 AM
I believe Scott did replace it.
snk328is
12-04-2002, 01:43 AM
Just my 2 cents...

Perhaps the hanger design can be improved so that there is a larger area to weld them onto the can. Speaking purely from just looking at the posted pictures, there doesn't seem to be a very large surface that the hangers are welded onto. I know a good weld will hold up for a long time, but by increasing the welding area, I'm sure the possibility of a bad weld can be overcome by the strength in numbers.
themadhatter
12-04-2002, 08:42 AM
take into consideration that with most welding techniques, the weld itself is strong but the welding byproduct is weak/fatigued metal surrounding the weld. this usually compensated by a larger weld area as snk328is mentioned.

I'm glad to see that stromung has taken measures to satisfy the customer. that in itself represents well for other potential customers interested in a Stromung system. :)
UD///M
12-04-2002, 03:34 PM
Originally posted by bimmer95
Actually the weld looks like it held up fine, there's a chunk ripped out of the can. Has Scott (Stromung's owner) seen this? What did he say about it?

That is typicly how a "weld" breaks. The weld itself is very strong but the heat affected zone around the weld is weakened by the weld process. 302 stainless is very susceptible to this. One of the metalurgists here explained the molecular details to me but I forgot the details.

Actually all welded metals have this HAZ but the post treatment of the metal can make a big difference. Some metal alloys are made to reduce the weakening tendancy. A weld area on stainless can also rust if care is not taken.