×
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

HOW DOES ASTM A574 COMPARE TO B7?

HOW DOES ASTM A574 COMPARE TO B7?

HOW DOES ASTM A574 COMPARE TO B7?

(OP)
Can anyone tell me how A574 compares to B7 with regard to high  temperature applications? My situation is that a B7 Socket Head Cap Screw (3/4"-10 X 3") was sheared during removal. Our vendor does not have any of these in B7, but assures me that A574 will perform just as well under my high temperature application. I can see that the A574 has higher Tensile Strength, Yield, And Hardness qualities, but I am still concerned about the temperature, which is nominal 800 Deg F. I have not been able to find any data to support the supposition that A574 will perform at this temperature range.

TIA

RE: HOW DOES ASTM A574 COMPARE TO B7?

Yes, there are differences in allowable stress values. Your source for information is ASME B&PV Code, Section II, Table 3  - Maximum Allowable Stress Values for Bolting Materials.

The SA-574 AISI 4140 material is limited to 550 deg F. The SA 193 Grade B7 is suitable for a maximum service temp of 1000 deg F.

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