hi every one i was told that 4140 should never be used past a hardness of 42 Rockwell max is this true? we have been using this matrial at 48-52roc for quite awhile and havent had a problem till reciently the pieces just shattered with not much force and this particular part could cause some...
Hi every one i am relativly new to this sight and to heat treating my question to all of you is this... Can you reverse the heat treating process I am heat treating parts made from 4140 steel using a oven some parts that i do come out just a tad softer than the requirements that are in place for...
