×
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

General question about hardening and tempering process

General question about hardening and tempering process

General question about hardening and tempering process

(OP)
To all,

I am in the process of evaluating the performance of an existing half hard tempered CRS bracket and I just realized that I don't have any information regarding the physical property of the material after the hardening process other than the hardness number.  I know there is a relationship between BHN and UTS, but is there anything else?  How about the yield strength?  Would the Young's Modulus be affected in anyway?

Any help will be greatly appreciated.

Thomas Wong
Chicago
 

 

RE: General question about hardening and tempering process

Knowing the material composition of the bracket, the answers to your questions can be found in a copy of the Metals Handbook, Desk Edition. Young's Modulus for metals is not affected by heat treatment.

RE: General question about hardening and tempering process

Thomas,
As metengr noted it depends on the material composition.  I am not familiar with a designation half hard CRS but for example; As rolled 1018 (mild steel) YS is 45ksi and UTS is 67ksi at HB 137.

If you do not have access to metals handbook, go to the FAQ tab on this forum and you will find some links there that will provide info for your alloy.

Jesus is THE life,
Leonard

RE: General question about hardening and tempering process

Generally CRS (cold rolled sheet) steel has < 0.10% Carbon and may be ordered in various "tempers" depending on end use.  In the case of steel CRS, this may mean an additional cold rolling operation after process annealing performed above the recrystallization temperature. Low process annealing temperatures coupled with higher reductions during temper rolling prduce higher strength materials.  

Half hard is also a well known designation for aluminum and copper alloy cold rolled sheet.

Additional cold working increases YS and TS and reduces the YS to TS ratio.

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