im thinkin of gettin a mig welder for my garage project im labeling "tube frame". anyways, since i dont have a TIG and i cant afford one i need to know what wire i can "tack" my tube frame car together with??? ill eventually roll it onto the trailer and take it to a local shop where i can have my welder finish the job correctly with a tig welder. anyone know????

 

ER70S2 or ER70S6

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">ER70S2 or ER70S6</TD></TR></TABLE>

alright, thank you. now since i know nothing about the wire itself could u please give a breif explanation of what the difference between those 2 wires are??
and bump for good info from a guy that has the same name as me.

 

If you use the ER70S, you won't have to heat treat the cage. Using chromoly welding rod will yield much stronder welds but must be heat treated after welding is completed.

 

thank u, thats exactly the info im lookin for. very informative.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by pngfolife &raquo;</TD></TR><TR><TD CLASS="quote">If you use the ER70S, you won't have to heat treat the cage. Using chromoly welding rod will yield much stronder welds but must be heat treated after welding is completed.</TD></TR></TABLE>

since he's welding chro-mo tubing doesn't he have to have the cage heat treated after welding anyway? Wont the tubing become brittle after final welding?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1 2 NV &raquo;</TD></TR><TR><TD CLASS="quote">

alright, thank you. now since i know nothing about the wire itself could u please give a breif explanation of what the difference between those 2 wires are??
and bump for good info from a guy that has the same name as me. </TD></TR></TABLE>

Someone correct me if im wrong, but the only difference between those two rods are one has .2% silicone and the other has .6%

 

unlike breast implants, that wire contains no silicone

 

you sure about that? Then what does the S-X stand for?

 

silicon

 

oh im a moron

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by nonsense &raquo;</TD></TR><TR><TD CLASS="quote">

since he's welding chro-mo tubing doesn't he have to have the cage heat treated after welding anyway? Wont the tubing become brittle after final welding? </TD></TR></TABLE>

If you use the ER70S, which is just mild steel but with a 70ksi tensile strength, heat treatment is not necessary. Of course, welding with CrMo rod and heat treating will yield much more strength and ductility. If you start with 90ksi, normalized, CrMo tube and use 90ksi rod, after heat treatment, you will end up with a part that has welds able to withstand very close to 90ksi in tension. Using ER70S is a way of bypassing the heat treatment process but you can only obtain decent strength.

 

no pre heat or heat treat needed on thin walled tubing &lt;.120"

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rtype11 &raquo;</TD></TR><TR><TD CLASS="quote">no pre heat or heat treat needed on thin walled tubing &lt;.120"</TD></TR></TABLE>

As long as the mild steel rod is used.