Arc welding chrome moly?

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I been told there are rods to weld chrome moly with a stick arc welder. Will weling this way be good to weld in a chrome moly roll cage?
Reply:I would not stick weld any roll cage, for any car. I would check the rule book for the class you want to run in, tube size and wall thickness. I would run wire or tig it out. I hope this helps.
Reply:I don't know what the cage is going in, but almost all of the major sanctioning bodies require C/M to be tig'd.  NHRA will especially have a cow if you try to stick weld it.  I just briefly mentioned it to a tech inspector one time (stick welding a cage), and he ranted for 30 minutes.        Check with your sanctioning body first, but I'd almost bet they're going to tell you "no way".Later,Maxx Levell Racing...There Can Be Only One.
Reply:I would think welding the chrome moly cage with a stick welder will be more stronger than a tig i wonder why it must be tig welded. Ill have to check if will be alright. Thanks yall.
Reply:What kind of car is this?  Drag, Circle Track, Rock Crawler, etc....?  And what type of vehicle (make, manufacturer)?  Later,Maxx Levell Racing...There Can Be Only One.
Reply:Simple reason for Tig vs all others.  Chrome moly althogh weighs per sq inch the same as mild steel its much stronger.  Therefore you should use much thinner Tubing to do the same job.  Also, the welds must be superb.  This is why tig is so good.  Arc isnt as diserable on thin stuff.  Another thing is the crystaline structure with chromemoly.  Chromemoly usually must be at minimum post heated, and often preheated.  There is also a very fine area of heat affected zone you want to have from your weld.  Of all the welding prodcedures only tig can offer you the finest heat affected zone.  So as to say much less area around the weld is affected by the heat ofthe weld.  Also tig is byfar the cleanest weldng process.  Because you are welding such thin material also, you have much less margin of error.  Therefore if you made a slag inclusion or any other potential problem, cold lap ect. You can have dire consequences.  Good luck and hope the answers are acceptable.CHRIS
Reply:Originally Posted by maxx levellWhat kind of car is this?  Drag, Circle Track, Rock Crawler, etc....?  And what type of vehicle (make, manufacturer)?  Later,
Reply:I would just go with a M/S cage and MIG it in.  This is acceptable by most every sanctioning body unless you're running incredibly fast.  I'd hate for you to spend the cash on a cage, and then not be able to run because a tech inspector refused to let you race because it was stick welded!  My .02LaterMaxx Levell Racing...There Can Be Only One.
Reply:There are SMAW rods for crome moly. Lincolns got them they are your 8018 9018 11018. All are low hy because of the susseptability of hydrogen indused cracking on Cr Moly. Tig is good because you reduce your chance of Hydrogen imbritlment but it has a higher heat Imput than ttig so you do more damage to the matrix with tig but get a higher quality weld deposit.
Reply:Originally Posted by WeldengineerThere are SMAW rods for crome moly. Lincolns got them they are your 8018 9018 11018. All are low hy because of the susseptability of hydrogen indused cracking on Cr Moly. Tig is good because you reduce your chance of Hydrogen imbritlment but it has a higher heat Imput than ttig so you do more damage to the matrix with tig but get a higher quality weld deposit.