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!

*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.

Jobs

Boron Steel for Grade 5 Bolts

Boron Steel for Grade 5 Bolts

(OP)
Is 10B21 Boron Steel acceptable to be used for Grade 5 Bolts? Where can I find the specification for this?
Thanks,
Bagyo

RE: Boron Steel for Grade 5 Bolts

It depends. I will look up the SAE spec tomorrow at work. If I recall, when supplier and purchaser agree and the mech properties are met, the use of 10B21 is acceptable.

RE: Boron Steel for Grade 5 Bolts

You want SAE J429. 10B21 is allowed, with a restriction that Mn must be .74 min. and .0005 min on B. Proper designation of this grade fastener is 5.2.

RE: Boron Steel for Grade 5 Bolts

(OP)
Swall,
Thanks for your input. I received grade 5 cap screws from our supplier and when I checked the Material Test Report, the products were made from 10B21 boron steel but the head marking is still with grade 5 not 5.2. The products passed the mechanical testing equivalent to grade 5 as per SAE J429. Do I have the right to reject the products because they were not designated appropriately?
Thank you

RE: Boron Steel for Grade 5 Bolts

Yes

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Boron Steel for Grade 5 Bolts

Bagyo,

The replies from swall and CoryPad are both correct.  The bolts should have been identified as Grade 5.2 and you do have the right to reject them based on the improper identification.  Whether or not you want to do this is a topic for another discussion.

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


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