AISI 9840 low alloy steel
AISI 9840 low alloy steel
(OP)
What is(was) AISI 9840 typically used for? Purpose for its creation? I see that it is a non-standard grade (USA), and is therefore not readily available here in the states. I am possibly looking to use it as a high-torque shafting material.





RE: AISI 9840 low alloy steel
If you are looking for a high torque application shaft material, I would recommend AISI Type 4340 alloy steel, which is in the same family of Ni-Cr-Mo alloys, and is probably easier to get.