×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

material EN 10058 EN 10089 - 56Si7 chemical composition tolerance

material EN 10058 EN 10089 - 56Si7 chemical composition tolerance

material EN 10058 EN 10089 - 56Si7 chemical composition tolerance

(OP)
Hi everyone, I have following question for help.

We have bought directly from manufacturer the flat steel strips in quality EN 10058 EN 10089 - 56Si7 with dimension 13x90mm L=6000mm each strip and in totally there were 40 strips.

After assembling and field work we have a break down of this strip (only 2 strips were broken). After checking the chemicals structure of the received goods in closest laboratory, we found out that there is one chemical that is out of specification when compared to Manufacturers certificate of quality.

According to manufacturers certificate C is 0,57
Our laboratory measured 0,539

Then we measured last year delivery and have following results:
manufacturers certificate shows C = 0,55
Our laboratory measured C = 0,401

Question is: is there any tolerance that is applied regarding this issues or given number in manufacturers certificate has to be the minimum that should be measured when checked.

What is you suggestion on this question, how to approach, thanks in advance

Zaak

RE: material EN 10058 EN 10089 - 56Si7 chemical composition tolerance

56Si7 is specified to have carbon content of 0.52-0.60% with a carbon equivalency of at least 0.7 (important if this is welded). Only your lab measurement showed deficiency and no tolerance would make that number acceptable.

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