Alans Scratch build

Having GT 40 Fun
Tig welding the frame. Got an AMICO 225HF DC Tig welder for $359.00 (Ebay) and it works great.
BUT learning how to tig weld takes some time, i had a lot of stick welding time so that helped. It took 3 days and a lot of You tube videos to get a pretty good weld weld. Make sure you grind the metal clean, use acetone to wipe clean, use 90 to 125 amps for 1/8" steel grind your tungstun tip @ 30 degrees and do not touch the molten metal or your you will have to regrind.USE PURE ARGON GAS for steel. AND practice a whole lot. AND keep watching the YOU TUBE videos.
 

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Another good information or "trick" ;
Use stainless steel rods for material to weld , you will have a cleaner weld aspect and a much more efficient "mobilitiy " on welded areas ( those being always very stiff no problem at all )
Using those and welding properly ( say on variuos area depending on the frame evolution ) you will prevent alot of " warping" , bending and shrinking
bad effects
Be carefull too to check the temp of wires when welding long welds , you can damage internal connections of the tungsten holder ; those "cheap " welders are nice and Ok but with no water cooling they can live short cuts or watever connection issues when coming hot after long welding session at more than 90 amp ( say welding in one shot for more than 5mn !!)
Chek also frequently status of the wire end bolted to the minus ( tends after some monthes of use to delaminate and become hot ( so have to be shorten a little and bolted again after may be ayear or so
Just my 2 cts
 
I would advise come caution and research before using a stainless wire to weld carbon steel. That can lead to some hot cracking, need proper ferite content, and mismatched strength and ductility issues. Also stainless steel filler is more expensive. Just a suggestion. Build looks great!
 
We have been using Stainless steel rods for decades to weld steel chassis with a lot of sucess and absolutly no issues at all ; this is a trick many "old crocodile welders" have shown to us and since we have used this we noticed that warping and other surprising movment of chassis after welding had minimised a lot ( some of parts and chassis done like so have been used in long distance races with absolute success)
Burt as usual and as said on the previuos post it is only "my 2 cts" ...... So anyone doing his proper project can decide or not to do test to check what sort of improvment this expertise can give ........
Of course ; yes those rods are much more pricy .......
 

Brian Kissel

Lifetime Supporter
Like Mic, I too have been using stainless rod for about the last 45 years. I have experienced no ill effects from using it. Proper prep and heat and penetration and it's worked fine for me. Your results may vary.

Regards Brian
 

Neil

Supporter
I prefer nickel silver bronze braze-welding- lower temperature, less distortion, can join dissimilar metals, etc. Disadvantages are that it requires a small torch, a closer fit and is more expensive.
 
That's pretty cool that it works so well for you guys. Nothing beats experience! The elongation is 10%+ more than steel filler....

Many ways to skin the cat. I remember when high end dragsters were brazed together.

Sorry if this got the thread off topic. You can learn so much from the highly experienced and talented people on here.
 
I am going to stick with steel rod ER70S-2
Wanted to share my thoughts on the floor as there was not a lot about it, anyway having fun today with the GT 40 I got a sheet of 16 gauge steel for the floor and cut it into 5 squares 2 for driver, passenger 2 for rear motor area 1 for front suspension area. Each section (.057 thick) was welded to frame (.125 wall) since I am just trying Tig welding out. I would like to share these thoughts. Gas flow 15 CFH Amp 110 cup size #6 Radnor 1/16 electrode ground to 30 degree tip. I used an aluminium block to keep thin metal cooler and to hold it down. Otherwise it will warp real bad.
They welds look like they penetrated good and the pool of melted metal was clean with no bubbles or splatter, and the welds were nice shiny color.
The thickness at 16 gauge was nice and stiff and not heavy. I also did each weld about and inch with a 1/4 gap between each weld for crack out if that were to happen. I think I will send out a sample section to NDT testing for mag, just for fun to see if the welds are correct. Thanks for all your thoughts and suggestions.
 

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I would advise come caution and research before using a stainless wire to weld carbon steel. That can lead to some hot cracking, need proper ferite content, and mismatched strength and ductility issues. Also stainless steel filler is more expensive. Just a suggestion. Build looks great!
Thanks for that, I am sticking with steel filler rod. Building this car is a lot of fun.
So far about 300 hours into the build
 
Another good information or "trick" ;
Use stainless steel rods for material to weld , you will have a cleaner weld aspect and a much more efficient "mobilitiy " on welded areas ( those being always very stiff no problem at all )
Using those and welding properly ( say on variuos area depending on the frame evolution ) you will prevent alot of " warping" , bending and shrinking
bad effects
Be carefull too to check the temp of wires when welding long welds , you can damage internal connections of the tungsten holder ; those "cheap " welders are nice and Ok but with no water cooling they can live short cuts or watever connection issues when coming hot after long welding session at more than 90 amp ( say welding in one shot for more than 5mn !!)
Chek also frequently status of the wire end bolted to the minus ( tends after some monthes of use to delaminate and become hot ( so have to be shorten a little and bolted again after may be ayear or so
Just my 2 cts
Thanks for the advice on stainless rod, for now sticking with steel filler but will try stainless down the road.
 
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