280Z-LS3 Posted November 17, 2020 Share Posted November 17, 2020 I butchered up a pair of transverse link mounts at an attempt to design some cross bracing. Did not go well as expected so have a replacement set on the way. While employing my "hack skills" noticed that Datsun used some hard alloy. Anyone know what type of steel Datsun used and recommended/required welding and rod that should be used? Quote Link to comment Share on other sites More sharing options...
AydinZ71 Posted November 17, 2020 Share Posted November 17, 2020 1 hour ago, 280Z-LS3 said: I butchered up a pair of transverse link mounts at an attempt to design some cross bracing. Did not go well as expected so have a replacement set on the way. While employing my "hack skills" noticed that Datsun used some hard alloy. Anyone know what type of steel Datsun used and recommended/required welding and rod that should be used? just to be clear, you are referring to the two rear cross members that mount the rear control arms to the body? I believe the transverse link mount is the technical term, but just wanted to be sure. the front one, I just recently stitch welded. I also repaired a crack that literally ran down the collar that is in contact with bushing. I used a .023 Carbon steel MIG welding wire with 25-75gas. I had no problem welding. The fusion on the crack repair was such that you can’t see any hint of a weld or crack, so I know the metallurgy worked. feel free to take a picture of the specific segment of the part you had trouble cutting so we can be sure we are discussing the same. IMG_4858.MOV IMG_4859.MOV Quote Link to comment Share on other sites More sharing options...
280Z-LS3 Posted November 17, 2020 Author Share Posted November 17, 2020 Yes, the transverse mount brackets are the two flat 3.5" wide brackets to attach the rear transverse mount to the frame. I have not tested the transverse mount metal with punch or any other method so not sure if it is made of the same hard steel as the brackets. Quote Link to comment Share on other sites More sharing options...
BoonZ Posted January 13, 2021 Share Posted January 13, 2021 I did a PMI and hardness test on a bracket from a 1972. The Rockwell test result is 34-40 HRC, a chalange for some hacksaw blades. The PMI test looks like recycled material. Zn 0.023, Cu .11, Fe 97.623, Mn 0.83, Cr 0.043, Ti 0.09 %, All other elements are below level of detection. The PMI gun (Niton XL 2 Gold XRF) will not pick up Carbon. Quote Link to comment Share on other sites More sharing options...
280Z-LS3 Posted January 13, 2021 Author Share Posted January 13, 2021 Thanks BoonZ! Would the PMI test indicated the use of a filler rod other than ER70S-2 or ER70S-6 rod? Put another way, will the S-2 or S-6 rod be sufficient for welding the brackets with the alloy you detected? Quote Link to comment Share on other sites More sharing options...
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