[python] Re: brazing aluminum ??

Do they braze with hot wax? Aluminium has a Melting Point about 600 to 700°C depending on alloys. 700-500=200!!!!! That's the point. 

Ciao Steffen



Ronald Hongsermeier wrote:

The key is the melt point of the rod. They say there is no flux involved, it is a 
metallurgical trick containing nine different metal alloys. They say the melt point is c. 
500 ° F lower than aluminum, that's what makes the thing they do with the pop can on 
the video possible. I wish I could borrow one of the airport fire dept.'s heat detectors 
to experiment with... Maybe sometime on night shift sometime next year. <shrug>

regards,
ron




-----Ursprüngliche Nachricht-----
Von: python@xxxxxxxxxxxxx
Gesendet: 22.12.07 22:35:20
An: <python@xxxxxxxxxxxxx>
Betreff: [python] Re: brazing aluminum ??




Comments from a friend - It's possible but tricky:
We actually did aluminum brazing at the course last year. It is possible, but 
VERY, VERY, ****VERY**** tricky. You must keep the flame moving steadily, watch 
the flux carefully, and feed the rod smoothly, in a non-stopping, sweeping 
motion. Heat, heat, watch flux, heat, watch flux, heat, flux melts, heat, try 
feeding rod, heat, rod melts, heat, keep rod moving, heat, flux is working, rod 
is flowing, GREAT, flow rod??. DOH!!!!!!!!!!!!!!!! Pile of *MISSING* Aluminum 
plate, along with a pile of aluminum that looks like an exploded pop can. 
HMMmmmmm, lets try again. 4 busted aluminum pop cans later, I am thinking I am 
mentally deficient. As I try to sneak my mess to the garbage can, a guy comes 
at me holding a melted, exploded pop can in his pliers and asks if I got it to 
work. I laughed and showed him my 6th attempt. We wandered around the class and 
determined that the instructor was the only one to be able to accomplish this 
task. We asked him to show us again, he did and (HA

 AA

 AA-haaa), he turned the plate into chrapnel this time, too.


I gave up.


----------------------------------------

Date: Tue, 18 Dec 2007 00:42:04 +0100
From: rwhongser@xxxxxx
To: python@xxxxxxxxxxxxx
Subject: [python] Re: brazing aluminum ??

I don't want to contribute to off thread bloat, but the advertising sentence was 
qualified: "Does the impossible! ? Accomplishes many repairs even after a welder 
says it can't be done stronger than welding and even repairs oily or oxidized 
metals."

I may try it out, if I can get alu tubing someplace more inexpensive than OBI.

If I do I'll let you know what I think and get a couple of opinions of welder 
friends.

cheers,
ron



-----Ursprüngliche Nachricht-----
Von: python@xxxxxxxxxxxxx
Gesendet: 17.12.07 21:29:33
An: python@xxxxxxxxxxxxx
Betreff: [python] Re: brazing aluminum ??

Ad reads, does the impossiable,that should tell you something !kind of like the 
lens doctor a complete fruad !and I thought they had laws aginst false 
advertisments ?


----- Original Message ----
From: brian smith To: python@xxxxxxxxxxxxx 
Sent: Monday, December 17, 2007 8:26:43 AM
Subject: [python] brazing aluminum ??

Things that sound too good to be true usually are.
has anyone on this list had any experience with this type of product for aluminum frame construction? 

http://www.aluminumrepair.com/

too bad there are no free lunches

regards to all
Brian

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