Guys- Thanks for all your replies.
dbooker630- I am not too sure of the heat treatment specs at this stage- will try to find more info.
gr2vessels- Thanks for the insight. It has given me the most sensible cause thus far- I will look into it. The only reason I did not go down that path...
Hi, I am hoping to gain some assistance on a Metallurgical topic. We are currently having issues with a gearbox shaft sleeve (Ø75OD, Ø63ID) which is currently 4142H. The problem is that the tube is subject to an abrasive environment (U/G coal mining) with coal shearing about its OD. Problems...