In regards to this term used of “quenched and tempered “ which is always stated to be at room temperature, I ask, well what the hell is room temperature!?
Is it 62, 68 or 72?
So I need to ask what kind of effect on Rockwell hardness would a 6 degree or whatever difference in temperature make in achieving a given minimum Rockwell rating?
Do higher grade steels need more accurate temperatures to meet a minimum Rockwell number then a 4340 material for example?
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Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs!
And he was not talking about 1/8 or 1/4 mile ETs!
1) 1940s 100% silver 4 cup tea server set.
Two dry rotted 14 x 10 Micky Thompson slicks.
1) un-mailed in gift coupon from a 1972 box of corn flakes.
Two pairs of brown leather flip flops, never seen more then 2 mph.
Education is what your left with once you forget things!
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