While re bar is not generally considered weldable, consult the re bar code.
D1.4, I think...
Rebar is produced with very few requirements as far as chemical composition. Some will weld ok, some near impossible to get a "real weld" in there. It is mostly junk and scrap.
If not a code job-7018 is probably your best bet. E71T-1 if you are using wire.
Stringer beads, of course.
Good Luck
brande
In years past rebar was, as the last reply stated, not specifically required to have a specific composition, at that time welding with E7018 stick was the accepted method. In recent years there have been two types of rebar that has been manufactured, one has a W included in the identifying numbers imprinted in the bar, this is as I have been lead to believe to designate weldable rebar and can either be welded with E7018 stick or E71T-1 dualshield wire. Good Luck, Allan
a long time ago I found this information in this site, I hope helps you.
www.precast.org/publications/mc/2004_julyaug/weldin_steel.htm
best regards
Horacio Navarro C.
hnavarro_59@yahoo.com.mx