lincoln pt175
set at 40 amps
3/32" red tung.
no filler.
20cfh,
.065 316ss tubing
7 cup size using a gas lens.

I think i can accurately follow a straight line now, however after looking at the welds the color seems off (dark), why? Does the pattern look right, almost looks like i am walking with too little of steps. Or is it just me, please critique, everyones feedback is welcomed.

Thanks in advance.

 

Yeah, a little too hot is making it black. Adding the filler will reduce the temps, and bring out the color.

What do you mean by walking the cup? I've never heard that before.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bryson &raquo;</TD></TR><TR><TD CLASS="quote">
What do you mean by walking the cup? I've never heard that before. </TD></TR></TABLE>

 

its where you pretty much tic tac the welding cup to get a consistent bead.

http://www.weldinginspectionsv...p.htm

 

nice welds man!

 

make sure you cut your pipes so they fit toghther properly, u can buy these special clamps so your butt welds meet so nice. i duno what they are called though...

they are like a clamshell u wrap around the pipe and put in a vice, then u cut down the middle.

byson i dont think he has his amperage to high, i think its to low and hes moving very slowly. i found i got that grey weld whenever i kept the stainless hot for to long..

 

thanks. fitup could not have been more perfect. it was straight fit up with no gap due ot no filler.

 

here are some new ones... just now,

 

im new to tig welding, but when you say no filler, what do you mean?

as in no welding rod, just melting the two together?

 

yep just fusing the two base metals together

 

The second set look really promising. From what I understand this technique can be VERY difficult to master. Now it seems like the next step is to introduce the filler rod.

 

thanks man that makes me happy to hear that. Ihave been trying for liek weeks now to get it right. I am a self taught welder so i have been trying to learn this pro technique. I can freehand, but walking the cup makes everything looks so clean.

 

turn up the heat and go. Fusing stainless is like that. get the weld over with, and just go like hell.

 

bad bad bad. you MUST use filler when welding ss. the filler is what gives your weld joint strength when welding ss. you can get away without it on ms and aluminum, but you should always use filler when welding ss. those welds will most certainly fail.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by weiRtech &raquo;</TD></TR><TR><TD CLASS="quote">bad bad bad. you MUST use filler when welding ss. the filler is what gives your weld joint strength when welding ss. you can get away without it on ms and aluminum, but you should always use filler when welding ss. those welds will most certainly fail.</TD></TR></TABLE>

Im sure it all depends on what the welds are for correct? For exhaust etc, it should be fine? and Charge pipings? Something like a exhaust manifold, then fillers are a good choice to go with?

I may be wrong

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by weiRtech &raquo;</TD></TR><TR><TD CLASS="quote">bad bad bad. you MUST use filler when welding ss. the filler is what gives your weld joint strength when welding ss. you can get away without it on ms and aluminum, but you should always use filler when welding ss. those welds will most certainly fail.</TD></TR></TABLE>


There is some good info in this topic by Randy(RMF) about not using filler:

https://honda-tech.com/zerothread?id=1323541

 

i'm sorry weirtech but your wrong. I have spoken to many many different pipe fitters and welders, and thats not true. I am sure in alot of applications you have to use filler, but i am welding a standard coupon for show on .065 wall.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by weiRtech &raquo;</TD></TR><TR><TD CLASS="quote">bad bad bad. you MUST use filler when welding ss. the filler is what gives your weld joint strength when welding ss. you can get away without it on ms and aluminum, but you should always use filler when welding ss. those welds will most certainly fail.</TD></TR></TABLE>

100% wrong. Please refrain from posting if this is the missinformation you are going to share with the group. You can fuse stainless tubing all day long if you want to. Now go fuse some AL tubing and see how strong it is.

 

i also concur...

 

When I fuse SS I go forward and backward ,Not side to side.That way the weld will go all the way through and still be thin.And I use a piece of alum. angle to line it up

 

interesting. thanks

 

Hey all.
I'm new here. Saw the link to my site and some of the questions. Welds without filler metal are commonly made on 300 series Stainless pipe in the foodservice and pharmaceutical industry., The "technical" name is an autogenous. Sometimes the elements in the SS can cause problems with these types of welds but in general, welds without filler are fine butr there are cases where problems can come up.

Have a good day

Gerald Austin

 

Emailed you, and thanks again for teh information.

 

ok so sche 10 pipe, using filler 60 amps...any better?

 

thats really lookin good...but why walk the cup vs a standard tig weld?