×
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.

Students Click Here

Nut Steel ISO898

Nut Steel ISO898

Nut Steel ISO898

(OP)
What are the differences between ISO 898-1 grade 8.8 bolt steel and ISO 898-2 grade 8 nut steel?
Replies continue below

Recommended for you

RE: Nut Steel ISO898

ISO 898-1 & 898-2 do not specify an exact grade of steel.  Rather, they define the mechanical property requirements, the allowable range of chemical composition, and whether or not the fasteners must be quenched and tempered.  For 898-1, Property Class 8.8, the allowable composition is as follows:

C = 0.25-0.55
P = 0.035 max
S = 0.035 max
B = 0.003 max

The C range is allowed to be 0.15-0.40 if alloying elements such as Mn, B, or Cr are used.  The minimum tempering temperature is 425 C.

For 898-2, Property Class 8, the allowable composition is as follows:

C = 0.58 max
Mn = 0.25 min
P = 0.060 max
S = 0.150 max

For sizes below M16, the nuts do not need to be quenched and tempered.

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



News


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