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!

*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

Stainless Material Selection for Fastener

Stainless Material Selection for Fastener

Stainless Material Selection for Fastener

Dear Forum:

I am working on a fastener design, and I am trying to select the proper grade of S/S.  Here are some of the restraints:
1.) The fastener is to be machined(screw machine or CNC lathe) from 5/16 dia. bar stock
2.) The required tensile after machining needs to be b/w 145-175 ksi
3.) I'd like to avoid heat treating if possible (mainly to cater to the cosmetic requirements i.e. the fastener needs to blend in color with mating 303 S/S parts) Heat treating is an option if there is a way to prevent discoloration.

I've tried 303, and 304 in the annealed condition and the tensile is not quite enough.  If someone offered 303 bar stock in the 1/4 or 1/2 hard condition, this would most likely solve the problem.  Any guidance would be much apreciated.

Replies continue below

Recommended for you

RE: Stainless Material Selection for Fastener

In order to guarantee tensile strength of 145-175 ksi, your options are Type 416 or XM-6 in the H condition (hardened) according to ASTM A 582 (free-machining stainless steel bars); Type XM-21 in the B condition (cold-finished) according to ASTM B 276; or one of the age hardening grades like Type 630 or Type 631 according to ASTM A 564.  The age hardening grades can be provided in the solution annealed condition or in the hardened condition.  Annealed strength is only ~ 125 ksi maximum, whereas hardened condition ranges from 125-190 ksi, depending on aging temperature.

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


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