×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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

Chemical Requirement Tables in Specs

thread177-257575

Chemical Requirement Tables in Specs

Chemical Requirement Tables in Specs

(OP)
I have a few quick questions concerning the chemical requirements tables in ASTM specs.

1. What do the "..." portions mean. Does that mean there is no max/min/range for that chemical element? Does it mean that the material can't have any of that element in it?

2. What if a material has elements not called out in the spec at all. Can the material be certified to a spec if for instance it has Copper in it, but Copper is not even mentioned in the spec its trying to meet?

3. Is there any ASTM guide to reading specs? I did a search for one and could not find anything.

Thanks everyone!

RE: Chemical Requirement Tables in Specs

1.  When there is an ellipsis, that means there is no requirement.  The sample can have any concentration and it does not cause a nonconformance.

2.  Yes, you can have presence of elements not identified in the standard and it does not cause a nonconformance.

3.  None that I know of.

RE: Chemical Requirement Tables in Specs

2.  If they have added enough of an element to actually make it another grade then it isn't allowed.
3. There are guides in ASTM.  I'll have to ask where to find it.

= = = = = = = = = = = = = = = = = = = =
Plymouth Tube

RE: Chemical Requirement Tables in Specs

Gorpomon, if you review the referenced general requirements spec for the product form, i.e. A-20 for PV plate, you will find such things as tolerances on composition and sizes, basic processing and so forth.

These will govern things not listed in the product spec.

Regards,

Mike  

RE: Chemical Requirement Tables in Specs

Tables used for data compilation of required chemical or mechanical property  requirements in Codes and Standards, will show ... for requirements not applicable. This is common nomenclature.

For example look at any ASTM specification that contains tables listing mechanical property or chemical composition requirements, values not listed are shown as ... because either elements stated or mechanical property test values do not apply.
 

RE: Chemical Requirement Tables in Specs

Most of the ASTM specs I look at say this right at the beginning of the table:

Quote:

Where ". . ." appears in this table, there is no requirement.

Hg

Eng-Tips policies:  FAQ731-376: Eng-Tips.com Forum Policies

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

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
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