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Science Forum Index » Engineering - Joining (Welding) Forum » Filler rod for TIG on steel
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| matthew |
 Posted: Thu May 01, 2008 10:07 am |
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Guest
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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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