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welding ???????????? chromoly to mild steel #1596243 03/21/14 04:45 PM 03/21/14 04:45 PM
Joined: Apr 2010 Posts: 1,049 ohio A all spooled up OP super stock
all spooled up OP super stock A Joined: Apr 2010 Posts: 1,049 ohio	can u weld a chromoly part to a mild steel part with a tig welder

Re: welding ???????????? chromoly to mild steel [Re: all spooled up] #1596244 03/21/14 04:59 PM 03/21/14 04:59 PM
Joined: Feb 2005 Posts: 20,172 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,172 PA.	Yes. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: welding ???????????? chromoly to mild steel [Re: all spooled up] #1596245 03/21/14 05:02 PM 03/21/14 05:02 PM
Joined: Feb 2005 Posts: 20,172 PA. pittsburghracer "Little"John
pittsburghracer "Little"John Joined: Feb 2005 Posts: 20,172 PA.	My Daytona cage (mild steel) was upgraded from a 8.50 cert to a 7.50 cert in 2009 and 6 chromoly bars were tig welded in. The guy doing the work prefers to work with moly. 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: welding ???????????? chromoly to mild steel [Re: all spooled up] #1596246 03/21/14 06:09 PM 03/21/14 06:09 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: can u weld a chromoly part to a mild steel part with a tig welder Yes any time you join moly to mild you have to play it just like moly... in other words it has to be tigged

Re: welding ???????????? chromoly to mild steel [Re: MR_P_BODY] #1596247 03/21/14 06:32 PM 03/21/14 06:32 PM
Joined: Oct 2009 Posts: 1,288 Oregon sg66mopar pro stock
sg66mopar pro stock Joined: Oct 2009 Posts: 1,288 Oregon	Are we talkin' cage here or just mild to Moly in general? I've mig welded the two a few times over the years in "non critical" applications with no problems. Just did the 7.50 upgrade on the Charger the last couple weeks and tig welded the Moly to the old mild steel cage. Proud owner of an NHRA 7.50 sticker.

Re: welding ???????????? chromoly to mild steel [Re: sg66mopar] #1596248 03/21/14 07:10 PM 03/21/14 07:10 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: Are we talkin' cage here or just mild to Moly in general? I've mig welded the two a few times over the years in "non critical" applications with no problems. Just did the 7.50 upgrade on the Charger the last couple weeks and tig welded the Moly to the old mild steel cage. Proud owner of an NHRA 7.50 sticker. If its a chassis the first joint to mild( if adding moly HAS to be tigged .. then each joint has to be tigged if its moly.... IF by chance you are adding mild to moly(chassis or cage set up)the first joint where the moly and mild connect it has to be tigged then all the rest of the mild can be migged... if its not a cert thing, then yes you can mig it.. but I dont like to.... I tend to tig even mild for a nicer looking weld

Re: welding ???????????? chromoly to mild steel [Re: MR_P_BODY] #1596249 03/21/14 07:17 PM 03/21/14 07:17 PM
Joined: Apr 2010 Posts: 1,049 ohio A all spooled up OP super stock
all spooled up OP super stock A Joined: Apr 2010 Posts: 1,049 ohio	its a moly rod end adapter to mild steel round tube..

Re: welding ???????????? chromoly to mild steel [Re: all spooled up] #1596250 03/21/14 07:22 PM 03/21/14 07:22 PM
Joined: Oct 2009 Posts: 1,288 Oregon sg66mopar pro stock
sg66mopar pro stock Joined: Oct 2009 Posts: 1,288 Oregon	I'd definitely tig that. ER70S2 rod, in my opinion. Last edited by sg66mopar; 03/21/14 07:24 PM.

Re: welding ???????????? chromoly to mild steel [Re: sg66mopar] #1596251 03/21/14 07:31 PM 03/21/14 07:31 PM
Joined: Apr 2010 Posts: 1,049 ohio A all spooled up OP super stock
all spooled up OP super stock A Joined: Apr 2010 Posts: 1,049 ohio	Quote: I'd definitely tig that. ER70S2 rod, in my opinion. thanks

Re: welding ???????????? chromoly to mild steel [Re: all spooled up] #1596252 03/21/14 07:48 PM 03/21/14 07:48 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: its a moly rod end adapter to mild steel round tube.. Still has to be tigged(in my opinion for the strongest joint).. the er70 is fine... also on tube adapters you should drill a hole back about half way on it through the tube and puddle weld it closed for a proper way to do it... I do that all the time(if you ever had it checked that is required) EDIT depending on the size of the insert I usually drill a 3/16 or a 1/4 hole to fill Last edited by MR_P_BODY; 03/21/14 07:51 PM.

Re: welding ???????????? chromoly to mild steel [Re: MR_P_BODY] #1596253 03/22/14 01:33 AM 03/22/14 01:33 AM
Joined: Apr 2010 Posts: 1,049 ohio A all spooled up OP super stock
all spooled up OP super stock A Joined: Apr 2010 Posts: 1,049 ohio	thanks mike

Re: welding ???????????? chromoly to mild steel [Re: all spooled up] #1596254 03/22/14 04:24 PM 03/22/14 04:24 PM
Joined: Jan 2003 Posts: 5,762 Hot Rod Ridge FastmOp master
FastmOp master Joined: Jan 2003 Posts: 5,762 Hot Rod Ridge	I have never seen anyone weld the rose-et welds on a four link or wheelie bars when useing threaded tube ends.

Re: welding ???????????? chromoly to mild steel [Re: FastmOp] #1596255 03/22/14 04:44 PM 03/22/14 04:44 PM
Joined: Jun 2003 Posts: 52,972 Romeo MI MR_P_BODY Master
MR_P_BODY Master Joined: Jun 2003 Posts: 52,972 Romeo MI	Quote: I have never seen anyone weld the rose-et welds on a four link or wheelie bars when useing threaded tube ends. All my inserts are puddle welded... front steering links as well as all the 4 link stuff.. and on every chassis that leaves my shop.. I was taught by a chassis guy and he said it is required.. I think I seen it in the NHRA rule book back a few years ago EDIT I know I seen it in the book.. but it was if you were splicing in a piece in tubing(with a inner tube inside the outer it is required) so this is basically no difference except its not in a certed area but it is for strength Last edited by MR_P_BODY; 03/22/14 04:48 PM.

Re: welding ???????????? chromoly to mild steel [Re: MR_P_BODY] #1596256 03/22/14 04:52 PM 03/22/14 04:52 PM
Joined: Sep 2011 Posts: 126 Howell,MI M Moparpoor member
Moparpoor member M Joined: Sep 2011 Posts: 126 Howell,MI	Mr P you are correct it is required and it is required to be at least 1/4 hole to plug weld.

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