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Posted by matthew on May 1, 2008, 4:07 pm
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Hello,
What is the difference between using ER70S-2 rather than ER70S-6 for
TIG welding steel? I have read that the S-2 is "triple de-oxidized"
with aluminum, titanium, and ziconium which makes it a good choice for
welding porosity prone materials (or dirty materials when GMAW
welding). However I have also read that the S-6 rod is the best for
porosity prone materials (or again dirty steel with GMAW) due do its
higher manganese and silicon content. So what is better: more Mn and
Si, or the "triple deoxidizer" cocktail?
I work in college welding lab that relies heavily on donated metal,
and some of the steel we get shows some porosity when TIG welded. We
are looking to stock up on filler materials, and I want to get TIG rod
that will be helpful in minimizing porosity.
Another question: I read somewhere that ER70S-2 is a better choice for
TIG welding 4130 chrome-moly (for weld joints needing high ductility,
and that will NOT be heat treated after welding). Does anyone have
thoughts on why that is? Thanks much!
Matthew C.
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Posted by Ernie Leimkuhler on May 2, 2008, 3:03 am
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In article
> Hello,
> What is the difference between using ER70S-2 rather than ER70S-6 for
> TIG welding steel? I have read that the S-2 is "triple de-oxidized"
> with aluminum, titanium, and ziconium which makes it a good choice for
> welding porosity prone materials (or dirty materials when GMAW
> welding). However I have also read that the S-6 rod is the best for
> porosity prone materials (or again dirty steel with GMAW) due do its
> higher manganese and silicon content. So what is better: more Mn and
> Si, or the "triple deoxidizer" cocktail?
>
> I work in college welding lab that relies heavily on donated metal,
> and some of the steel we get shows some porosity when TIG welded. We
> are looking to stock up on filler materials, and I want to get TIG rod
> that will be helpful in minimizing porosity.
>
S-6 will work but not very well for TIG.
The extra silicon can react badly to the TIG arc and can cause more
porosity.
> Another question: I read somewhere that ER70S-2 is a better choice for
> TIG welding 4130 chrome-moly (for weld joints needing high ductility,
> and that will NOT be heat treated after welding). Does anyone have
> thoughts on why that is? Thanks much!
>
> Matthew C.
No.
Not ER70S-2.
You want ER80S-D2, a very different and stronger rod, that does work
for TIG on 4130 tube without heat treat.
You can buy it from
http://www.tigdepot.net/products2.php?categoryID=38
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Posted by matthew on May 2, 2008, 9:15 am
Please log in for more thread options Thanks for the reply! What is the best rod for TIG on carbon steel, in
your opinion? S-2? Thanks!
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Posted by Ernie Leimkuhler on May 2, 2008, 9:31 am
Please log in for more thread options In article
> Thanks for the reply! What is the best rod for TIG on carbon steel, in
> your opinion? S-2? Thanks!
S-2 I suppose, but I rarely use it.
Unless you are welding gun parts that need to color match for bluing I
see no need to even use carbon steel filler rod.
Use 308L stainless steel filler.
Flows better, stronger, and the nickel kills porosity on it's own.
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Posted by matthew on May 2, 2008, 10:39 am
Please log in for more thread options > Use 308L stainless steel filler.
> Flows better, stronger, and the nickel kills porosity on it's own.
Yep, I agree. I use 308L quite a lot for TIG welding steel. However,
my objective at this point in time is to pick a good rod for the
students to use when they are practicing, and I would like to find
something a little cheaper. I like to have them spend a good amount of
time welding carbon steel before I move them on to stainless. Thanks
again!
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> What is the difference between using ER70S-2 rather than ER70S-6 for
> TIG welding steel? I have read that the S-2 is "triple de-oxidized"
> with aluminum, titanium, and ziconium which makes it a good choice for
> welding porosity prone materials (or dirty materials when GMAW
> welding). However I have also read that the S-6 rod is the best for
> porosity prone materials (or again dirty steel with GMAW) due do its
> higher manganese and silicon content. So what is better: more Mn and
> Si, or the "triple deoxidizer" cocktail?
>
> I work in college welding lab that relies heavily on donated metal,
> and some of the steel we get shows some porosity when TIG welded. We
> are looking to stock up on filler materials, and I want to get TIG rod
> that will be helpful in minimizing porosity.
>