4140-4142 Annealed or Heat Treated?
4140-4142 Annealed or Heat Treated?
(OP)
I am designing a short shaft that will see high torque loading. I need the YS to be around 90ksi. My steel supplier has these 2 options in 4140:
4140-4142 Annealed
4140-4142 Heat treated
(Vague at best, I realize)
I would prefer to just buy, machine, and install if possible. What is my best choice if limited to these 2?
4140-4142 Annealed
4140-4142 Heat treated
(Vague at best, I realize)
I would prefer to just buy, machine, and install if possible. What is my best choice if limited to these 2?





RE: 4140-4142 Annealed or Heat Treated?
RE: 4140-4142 Annealed or Heat Treated?
RE: 4140-4142 Annealed or Heat Treated?
RE: 4140-4142 Annealed or Heat Treated?
RE: 4140-4142 Annealed or Heat Treated?
Pre-Hardened 4140-4142 is going to be a bit of a bear to cut with normal cutting tools, (even carbide). But it can be ground with ease, and should be straighter. Teh annealed material will be relatively soft and can be cut easily. You will need to be carefull during heat treat to assure straightness. Or you could start with much thicker stock and grind the OD to size after hardening, and provide straightness.