×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Jobs

Material selection and heat treatment of pins

Material selection and heat treatment of pins

Material selection and heat treatment of pins

(OP)
Hi All,

FIrst timer here, great site!

I am after your suggestions on what steel to make 25mm pins out of for a large tractor mulcher. The pins are 25mm round with a head on one end and a split pin in the other.  The old pins are case hardened I think (or flame etc) as a pin punch doesnt touch them, yet the core is much softer as expected.

At my disposal is a standard machine shop and a small furnace.

Is 4140 or 1045 suitable for this? Is the supplied hardened and tempered state sufficient for maximum strength? I would then attempt to flame harden this by hand with a oxy acetylene torch with a water jet attached. Workable?

If not - I would greatly appreciate your suggestions. The old pins were breaking (clean breaks, rather than bending)

Kind Regards, Iain.  

RE: Material selection and heat treatment of pins

Are they loaded in shear?  Was wear present?  Fatigue evidence?  Any photos?

"You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein  

RE: Material selection and heat treatment of pins

(OP)
Hi,

Thanks so much for your reply. I will take a photo and post it this evening or tomorrow morning (pin is not here at present). The pin is loaded in shear. There is some wear evident from the blades (will show in photo).

Regards, Iain.

 

RE: Material selection and heat treatment of pins

(OP)

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!


Resources