Tig welding custom cut bend pipes

[jerky]

when your welding stainless you should always use filler. even if you dont need to. the reason being that when you weld stainless, you creat alot of heat in one area, and being stainless, it doesent move that heat very good. SO in your HAZ (heat affected zone) becasue you have such high heats, you can get carbide percipitaion. basically the worse thing to have on stainless. ADDING filler whilst you weld actually decreases the weld puddle temperature thus reducing the chance of CP.

[67cudafb]

Sorry if your looking for bashing you need to go to miller forum. EL members do not bash or be little other members just share there knowledge and try to help each other. I can tell you there is some smart and talanted people here and willing to help and help you be a better welder.

[DaveO]

LOL! Cuda, you beat me to it. Sorry, Vinhtec, we don't bash here, altho we can direct you to some other sites. Sure looks like you nailed the fit-up, and I'd say fairly impressive for your second time out of the gate. What kind of vehicle gets the turbo when it's done?

[Jake98]

Sure looks like you nailed the fit-up, and I'd say fairly impressive for your second time out of the gate.

Yeah, I'd say... Looks real good!

[brad3579]

Very nice job.
I sure hope when I get my Tig that I can weld like that starting out.
Any pics of what it is going into.

[Vinhtec]

Very nice job.
I sure hope when I get my Tig that I can weld like that starting out.
Any pics of what it is going into.

Yeah you can just read as much as you can that is how I started. I think I read for like 3 years before I had the cash or knowledge to do anything. Then its just seat time. (I need tons more). Ill get some pictures together soon !

[Vinhtec]

Yeah, I'd say... Looks real good!

Thanks a lot I hope to have better work to show ever one soon !

[Jason]

Instead of making tons of posts in a row spaming, you can quote multiple in one post. Anyways good job on the custom cuts. How well did that tape hold them together while you tacked them?

[Vinhtec]

Instead of making tons of posts in a row spaming, you can quote multiple in one post. Anyways good job on the custom cuts. How well did that tape hold them together while you tacked them?

Good idea that Ill do that next time !

Thanks I made a little jig out of wood to hold the pipe while I cut it. The angle was approximate but it seams to hold close to 15 degrees.I sanded them pretty well and they matched up almost 100% flushed so the tape didn't bind them that tightly. It just held them there for a couple of tacks then I just tore it off.

[Vinhtec]

LOL! Cuda, you beat me to it. Sorry, Vinhtec, we don't bash here, altho we can direct you to some other sites. Sure looks like you nailed the fit-up, and I'd say fairly impressive for your second time out of the gate. What kind of vehicle gets the turbo when it's done?

I am a Honda guy. I have a little 95 civic sohc engine that I am doing a home made turbo to. I got bunch of free stuff from friends just trying to make it work. I plan on making it a daily driver and as long as I dont goose it too much the car should make decent power and gas mileage! Thanks I got good advice from some one here on fit-up and it worked out great ! I am trying hard to get it moving a long Id really like to make something that works soon that be amazing !!!

[Vinhtec]

Sorry if your looking for bashing you need to go to miller forum. EL members do not bash or be little other members just share there knowledge and try to help each other. I can tell you there is some smart and talanted people here and willing to help and help you be a better welder.

Thanks I wont go to the Miller forum ever. I been bashed before for no reason and I love to stay away from that. I hope that talented people show up on my threads and give more pointers I got this far with good old fashion advice taken serious!

[Vinhtec]

when your welding stainless you should always use filler. even if you dont need to. the reason being that when you weld stainless, you creat alot of heat in one area, and being stainless, it doesent move that heat very good. SO in your HAZ (heat affected zone) becasue you have such high heats, you can get carbide percipitaion. basically the worse thing to have on stainless. ADDING filler whilst you weld actually decreases the weld puddle temperature thus reducing the chance of CP.

Yeah thanks ! I read that feeding wire in helps the temperature stay down a lot when welding stainless. This time was mainly a practice attempt. I am still really slow and cant get good body position to move fluidly. I have a small spool of left over 308L stainless weld wire (or something) from a mig welder I am going to feed that stuff into the weld next time. I read somewhere that the silica in it or something helps keep it cooler. I just need tons more seat time to practice feeding wire and moving. Its also hard since the pipes a curved thing and not flat it makes it harder. Ill keep trying though.

[Vinhtec]

when your welding stainless you should always use filler. even if you dont need to. the reason being that when you weld stainless, you creat alot of heat in one area, and being stainless, it doesent move that heat very good. SO in your HAZ (heat affected zone) becasue you have such high heats, you can get carbide percipitaion. basically the worse thing to have on stainless. ADDING filler whilst you weld actually decreases the weld puddle temperature thus reducing the chance of CP.

Yeah thanks ! I read that feeding wire in helps the temperature stay down a lot when welding stainless. This time was mainly a practice attempt. I am still really slow and cant get good body position to move fluidly. I have a small spool of left over 308L stainless weld wire (or something) from a mig welder I am going to feed that stuff into the weld next time. I read somewhere that the silica in it or something helps keep it cooler. I just need tons more seat time to practice feeding wire and moving. Its also hard since the pipes a curved thing and not flat it makes it harder. Ill keep trying though.

I am not sure about Carbon Precipitation but I read this.

http://www.azom.com/article.aspx?ArticleID=1177

Yeah looks like elevated temperatures will allow the chromium to form carbides when the temperature is elevated. Ruining the corrosion resistance and making it brittle. This stuff makes sense since I have taking a material science class on grain boundry formation after elevated temperature and this makes perfect sense. When the grain boundaries reform the chromium and the carbon from carbides on the surface.

Doesn't solar flux prevent this? I see much less black chunky stuff inside the pipe in comparison to when I welded with out it.

Do you know what temperature the weld would be with out filler and with filler? Looks like the range is like 425 - 800 C with 700 C being a critical temperature. I guess Ill get a pyrometer to measure it with and with out filler. Ill have to test it I guess.