×
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

ASTM A6-08 Plate Tolerance Question

ASTM A6-08 Plate Tolerance Question

ASTM A6-08 Plate Tolerance Question

(OP)
In Table 1 of ASTM A6-08 there are five (5) notes. Note 4 reads "For thicnkesses measured at any location other than that specified in Note 3, the permitted variations over specified thickness shall be 1 3/4 times the amount in theis table, rounded to the nearest 0.01 in." I read this as allowing me to multiply the table's values by 1.75 if I am measuring the thickness at a location different that that identified in Note 3. (Note 3 tells you to measure the thickness 3/8 to 3/4 inches from the longitudinal edge. This seems excessive to me. A 75% increase in the allowable thickness tolerance. Am I reading this note correctly?  

RE: ASTM A6-08 Plate Tolerance Question

That sounds reasonable to me.  For one thing, the rolling process is going to inherently have a tendency to roll thicker in the middle that has to be counteracted.  For another, this probably dates from long ago when measurements were by micrometer, which meant there was not necessarily a reasonable way to measure the thickness out in the middle of the plate.  And lastly, in most applications, plate being overly thick isn't really objectionable, unless you have to pay for that extra weight.  If it was more critical, tolerances might be tighter.

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