Yes, I am familiar with 300M and it is on my short list of material options and thank you for the 9310 suggestion. Back to the origonal question. To justify the expense of the 300M on paper by showing an increase in strength over 4340. If the hardness call outs are the same according to this...
The part is a bearing surface and requires the surface to be hard. Not sure if 4340 through hardened to Rc50 would be hard enough surface for wear with out the Nitride? Also not sure what the upper limit of 4340 is with out becoming too brittle.
Yes swall, I have the microhardness profile measured through the case and core. I have modeled the cross section in Microsoft Excel using the varing hardness profile at each depth interval. To compare a part through hardened made of 4340 with a thinner Nitride case I would model acordingly. I...
Thank you for the feedback. Does this mean that regardless of the specific alloy of steel that the strength calculations are based on the heat treat hardness specifications. I guess I assumed that different alloys at the same hardness would have a different YS and perform differently. I was...
I am trying to calculate the strength of a heat treated part made from 8620. I have the hardness profile of the case and core measured from a lab. I have a hardness conversion table for steel to convert Rc to UTS. Is this correct or should I use a table specific to my material. I would...
Working on an application for a CV axle. Material called out for the cage in the supplier print in the CV joint is 20CrMnTi. This material was said to be equal to SAE 8620. I believe SAE 8620 is equal to 20CrNiMo. The part is to be carburized to HRC 58-62. This is an aftermarket application...
This would be more competition than high mileage. I believe that the two stage heat treat would give a tougher part and still have a hard surface to give good wear resistance. I also understand that the 300M is substantially tougher than 4340. The question for the experts is if the RHC values...
Looking for input on selection of material and heat treat for components in a Rzeppa style two fixed joints with plunging spline CV axle. The design is for an extreme ATV with high angle axles over 30 degrees and large aggressive mud tires. The goal is to design the “ultimate” ATV axle...
