Will J-B weld hold 20 psi?

[mTALONm]

Saw this on ebay http://cgi.ebay.com/ebaymotors/J-B-...010QQitemZ200054582238QQrdZ1QQsspagenameZWD1V

and thinking to "weld" a Greddy BOV flange with this. Anybody knows if it will work fine?

thanks

 

[Mike1992]

I bought an aluminum flange and had wanted to have it welded on my 2.5" steel piping (UICP), but wasn't able to get it done locally so i jb welded my flange to my piping. I used two layers of it and its been holding solid ever since. Been over 6 months and running 20-25 psi without any leaks, .

 

[xveganxcowboyx]

Just don't buy the stuff on ebay. It's $5 at your local hardware store.

 

[DSM90AWD]

Yea, welding AL to Steel ain't gonna happen. I'm sure JB Weld could work, though for how long, I dunno. If you do do this (I don't recommend it) be sure to safety wire your BOV so it doesn't get lost if/when it does fall off

 

[oldman]

If you do do this (I don't recommend it) be sure to safety wire your BOV so it doesn't get lost if/when it does fall off

Is that why they call it the "blow off valve"?

 

[mTALONm]

Thanks a lot guys, i'll try it. But what's the difference with ebay stuff?

 

[tom04841]

There is no difference. You can get that stuff at any local autoparts store of $5.

I don't know if it will hold the bov flange to the steel, but i do know it does work well for sealing pinholes in welds.

 

[GVR4592]

If you follow the instructions it will probably hold it forever.

 

[Mike1992]

Thought I'd throw a picture in there

 

[Mikael SS]

Yea, welding AL to Steel ain't gonna happen. I'm sure JB Weld could work, though for how long, I dunno. If you do do this (I don't recommend it) be sure to safety wire your BOV so it doesn't get lost if/when it does fall off

YOu can weld aluminum to steel.

 

[srumel]

my guess is yes. i had a little jbweld experience of my own today. let's just say it involves a stud, the head, and where a fuel rail bolt used to go. so far so good

 

[DSM90AWD]

YOu can weld aluminum to steel.

JB "Weld" is an epoxy, and is no more a "welding process" than soldering or licking an envelope.

Definition of weld:

To melt the base metal so that a puddle joins the puddle from the other piece of base metal, then becomes permanantly a part of each other as the molten puddle freezes.

- Richard Finch (Performance Welding)

 

[Mikael SS]

JB "Weld" is an epoxy, and is no more a "welding process" than soldering or licking an envelope.

Definition of weld:

I understand welding. How i read your quote, i thought you were trying to say that stl. can't be welded to al.

Were you trying to say that JB weld won't hold the two together?

 

[GVR4592]

He's saying you can't weld steel to aluminum.

 

[Mikael SS]

He's saying you can't weld steel to aluminum.

Well then i think my first post was pretty clear, in that you can.

 

[GVR4592]

How?

 

[absolute_DSM]

You cant weld steel to aluminum. You can bond it together with JB Weld though.

 

[qwklil4]

How?

Ask mazda. The new miatas frame is part steel, part aluminum, welded. not for the average joe (or any joe...)

 

[clipise]

Ask mazda. The new miatas frame is part steel, part aluminum, welded. not for the average joe (or any joe...)

how about you ask them since your the one who is providing this information.

 

[qwklil4]

Search for "welding steel to aluminum mazda" on google...

http://www.mazda.com/publicity/release/2005/200506/050602.html

first hit.

 

[jasonlee]

driveshaft shop uses a process called "techna pulse" to bond aluminum and steel... but they didnt call it welding.....

 

[GVR4592]

I've seen the Mazda article, but that's not really welding and they might have been the first to patent it, but they aren't the first to do it.

 

[qwklil4]

Isnt it welding? I would think it holds to at least the definition given earlier in this thread. Theres no filler anyway.

 

[DSM90AWD]

Ok I concede, if you have access to a $10M robotic frictional metal joining machine with the proper tooling..etc you can spot-join AL to Galvanized Sheet Metal.

So thank you both MikaelSS and qwklil4 for sharing you wealth of knowledge in cutting edge aerospace metal joining techniques and its potential applications to DSM BOV flanges.

I'll be sure to give you appropriate feedback on you clear, concise and OT posts

Another technique for joining light gauge tubular AL to tubular steel (which is used in driveshafts) is magnetic-pulse welding though it's applicaton to BOV flanges has yet to be seen.

 

[a351must2]

I've seen grounding straps in the military that were made of steel bonded (might not be "welded", but the joint did look like a weld) to aluminum. Stuff that's been around since the early 70's. Used for grounding aluminum ladders to steel decks on ships, without having to worry about dissimilar metal corrosion.