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Showing results for tags 'ams 5643 h1075'.
I found this bar/block of steel 3" x 3-1/2" x 13 inches at a scrap yard yesterday and couldn't resist at 20 cents per pound. I have not tried any spark test on it but as you can see in the photo it has some numbers written on it, a lot probably relating to some job. I can make out AMS 5643 and H1075 . Researching on line these leads to information on heat treating 17-4 stainless (one hour at 900 degree F and air cool yields Rockwell C 44). The steel is magnetic, but noticeably less so that the jaws of the vise to the left. It was sold to me as generic steel rather than stainless which woul