Chromoly Tube for Roll Cages,etc.

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Hi All,Question #2- I am building an Offroad Race Vehicle Based on the XJ Jeep Cherokee made from 84-01. The Main structure of the cage is all 1.75 X 1.20 Chromoly Tube. It is all double shear with the cage to Unibody tie in points attaching to 1.75" tube sections that are run through the sudo "frame rails" which the entire vehicle has been plated/boxed,all done with Chromoly Tube. The Tube that is non structural like the 1" stuff running from the A pillar down and supports the shifter,switches,etc.,all done with mild steel with a MIG welder. Back in the 80s my entire chassis was migged with "MIG MIX" gas and standard wire. I raced it several seasons and never had a problem. Now everything I read says it must be Tig or Stick welded,what gives,Is there an acceptable setup for Gas/Wire that is better to attach accessories ,tire carriers,and such for welding Mild Steel?thanks,Ace
Reply:What/where are you reading that your project requires GTAW or SMAW?
Reply:Are you asking about using mig for chrome moly to chrome moly or Chrome moly to mild steelSent from my SCH-I605 using Tapatalk
Reply:Actually some of each. I am building spare tire mount,jack mount,fuel cell and battery boxes all of mild steel to attach to existing cage,and also welding link pivots for the rear 4 link I just finished fabbing up. I will probably just tack the suspension links with mig,cycle the suspension and make sure all is good then have that TIG welded. The rear firewall,B pillar to A pillar crossbracing was done with mild steel to chromoly pillar tubing. I was considering cutting the Mild Steel out and replacing it with at least 1.20 dom OR preferably Chromo. Several "Welders" I have talked to out here were all of the same opinion that Chromo is a waste of money for X Bracing and Mildsteel is Fine, Feedback? Thanks So Much all who have responded for taking time out of your lives to answer this thread.Ace
Reply:Originally Posted by vegaslightsssSeveral "Welders" I have talked to out here were all of the same opinion that Chromo is a waste of money for X Bracing and Mildsteel is Fine, Feedback?
Reply:Originally Posted by G-sonIt is, on the other hand, not stiffer - so where tubes bend it makes no diffrence except for costing more money.)
Reply:Used to run 3/32 LH-70 on 4130 cm steel. Before we had a tig.