Hey Tango: I'll put my 2 cents in to. I've worked in job shops for 35 years and any casting could be steel, cast Iron or a mixer. Any thing but pure steel should be pre and post heated and welded with Nirod stick. Also you can get a asbestes blanket and wrap up your axle while it cools. You can do a spark test with a grinder to compare sparks on steel to your casting. Cast Iron will not cut with a torch,it will only melt. Another test is weld with a steel rod and take a file and see if the weld is hardend,if it s it's cast Iron. If in doubt use Nirod
Last edited by Chris's 46 / 515; 11/05/2014 3:51 AM.
