Some very interesting articles there – BIG thanks! I am still reading through them since it has been a busy day here but here are some random thoughts:
That McBride article shows that water quenching was not as good as air cool after annealing that is very interesting. I wonder what we can make of this since many of us do in fact use water quenching to cool our brass and and the conventional thinking has always been that it does not affect the brass or the annealing process. The data in the article is of course an N=1 so not too significant but still…..
The article from The Pacific Journal of Science and Technology shows a leveling of Hardness, tensile strength, impact energy and yield strength seems to level off (at least it does not appear to undergo an abrupt transition like between 240-250) even at 800 degrees C which would suggest that further heating does not increase softness – at first I thought too bad he did not heat it up to even higher temps but the Olin article shows that the melting point of cartridge brass is in fact at 955 degree C so 800 is pretty close to that. So what is the truth, does overheated brass gets soft and loose all its spring back as mentioned in the Ken Light article?
Two interesting things to ponder over….
That McBride article shows that water quenching was not as good as air cool after annealing that is very interesting. I wonder what we can make of this since many of us do in fact use water quenching to cool our brass and and the conventional thinking has always been that it does not affect the brass or the annealing process. The data in the article is of course an N=1 so not too significant but still…..
The article from The Pacific Journal of Science and Technology shows a leveling of Hardness, tensile strength, impact energy and yield strength seems to level off (at least it does not appear to undergo an abrupt transition like between 240-250) even at 800 degrees C which would suggest that further heating does not increase softness – at first I thought too bad he did not heat it up to even higher temps but the Olin article shows that the melting point of cartridge brass is in fact at 955 degree C so 800 is pretty close to that. So what is the truth, does overheated brass gets soft and loose all its spring back as mentioned in the Ken Light article?
Two interesting things to ponder over….
