Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Alternative to Nitrided 20MnCr5

Alternative to Nitrided 20MnCr5

Alternative to Nitrided 20MnCr5

Good day everybody,

I've been assigned to a project of a spindle where i need to find a replacer to nitrided 20MnCr5.

The current process:
pre machining of the spindle; quenching and tempering to obtain 25~29 HRc; final machining; surface nitriding (0,3mm) to obtain >650Hv; griding.

My question is if you think AISI 4140 with induction surface hardening could be a alternative to the current process, since we have it with 25~30 HRc, and under hardening conditions ranges from 55 to 60 HRc.

Sorry about the bad inglish, and thanks for any reply.

RE: Alternative to Nitrided 20MnCr5

We have made conversions from a carburized to an induction hardened process using similar materials. You may need to validate the change with some type of fatigue testing based on the expected loading your spindle will see in service.

RE: Alternative to Nitrided 20MnCr5

I agree with dbooker630. Do you have the ability to test the spindle under realistic conditions?

RE: Alternative to Nitrided 20MnCr5

Yes i have, but i need to be sure that it is possible to achieve the same condition with the AISI 4140. This because i'll need to manufacture a specific coil in order to properly harden the spindle after its machining.
Right now i'm testing round samples with 40mm diameter to verify if they can be hardened up to ~57HRc with the ideal depth in the induction hardening machine.


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


White Paper - PLM and ERP: Their Respective Roles in Modern Manufacturing
Leading manufacturers are aligning their people, processes, and tools from initial product ideation through to field service. They do so by providing access to product and enterprise data in the context of each person’s domain expertise. However, it can be complicated and costly to unite engineering with the factory and supply chain. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close