×
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

Copper in a283 gr.c

Copper in a283 gr.c

Copper in a283 gr.c

(OP)
I have a technical question about the amount of copper in A283 sheets.
In standard A283, the amount of copper is specified as at least %0.2. Of course, it is said that when copper is specified. Can anyone advise if the buyer does not specify the amount of copper to the manufacturer, the manufacturer can create the amount of copper less than %0.2 in the sheets?
What is the minimum amount of copper if not specified?

RE: Copper in a283 gr.c

From an Acelor Mittal publication:

"Copper is added to steel primarily to improve the steel’s resistance to atmospheric corrosion, such as ArcelorMittal USA’s weathering steels. In the usual amount between 0.20 percent to 0.50 percent, the copper does not significantly affect the mechanical properties. In levels to 1.00 percent, copper (in combination with nickel) can increase strength by precipitation aging as in ArcelorMittal USA’s Spartan™ and A710 steels. Copper contributes to hot-shortness (unless nickel is also added) and a more adherent mill scale which adversely affects surface quality."

My understanding of this statement is that there are advantages AND disadvantages to having copper in your ASTM A283 plate ... You, the purchaser must know and understand your choices..

My understanding of ASTM Specification A283 Grade C is that plate can meet the specification with our without the copper, up to the maximum specified. It is an optional alloying metal that may or may not be required by the purchaser

Does this answer your question ?

MJCronin
Sr. Process Engineer

RE: Copper in a283 gr.c

In melting of scrap for steel making, copper is an inevitable constituent. Generally speaking when Cu is less than 0.20% it was not added by the Manufcturer.

RE: Copper in a283 gr.c

(OP)
Thank you MJCronin & weldstan.
Thanks for your explanation.
1. So if I understand correctly. Manufacturers can typically deliver less than 0.2% of copper in a283 unless the buyer or customer specifies a specific quantity.
2. My question was about the amount of copper specified in standard a283. The standard states that the minimum amount of copper is 0.2 percent for when the amount of copper is specified. Well, if we do not determine the amount of copper as a customer, does not the amount of copper less than 0.2% in the chemical analysis of a283 conflict with the standard amount?

RE: Copper in a283 gr.c

If copper is specified by the purchaser, the minimum is 0.2%. In this case it is obvious that the purchaser wants copper added to provide additional atmospheric corosion resistance. If the purchaser does not specify copper as an alloying element, the amount of copper need not be provided in the chemical analysis, though the material may actually have greater than 0.2% or may not depending on the amount of copper in the scrap for melting.

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