×
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

ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

(OP)
Hai,


While reviewing the MTR's for the ASTM A 53 Gr B / API 5L Gr B Pipes MTC the Carbon percent is mentioned upto 0.30 % is allowed by the standard specified limits, So this pipes are fall under MILD STEEL category or Low CARBON STEEL category?


Any standard is given clear detail about chemical composition of mild steel and carbon steel?

In generally the carbon percent only decides the steel category right then why the ASTM standards are not clearly stating that steel category in some standards LIKE mild steel, Carbon steel

ASTM A 106 Gr B - Mild Steel ?

ASTM A 53 Gr B - Mild Steel ?

ASTM A 234 WPB - Mild Steel ?

REGARDS,

G.SRIRAM.

Dream,Dream,Dream Dream transforms in to thoughts.And thoughts result in action

RE: ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

I generally consider steels below 0.15% carbon to be low carbon, while 0.15 - 0.30 to be mild. Of course, specs often straddle these definitions.

RE: ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

I don't get bothered by any such distinction, but I have rarely encountered 'mild steel' in industry.
The distinction I am more interested in is weldable, less weldable and non-weldable.

"Everyone is entitled to their own opinions, but they are not entitled to their own facts."

RE: ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

I've seen varying ranges, but what I've see most often falls in line with mrfailure.

Low Carbon Steel - less than 0.20% Carbon (although I've seen this number be 0.15% as well, as mrfailure stated)
Mild Steel - 0.20%-0.50% Carbon
High Carbon Steel - over 0.50% Carbon

As far as why ASTM doesn't clearly state the category... 🤷... Maybe they don't think it's necessary. Maybe they assume the people reading the specifications already know that information. Maybe they think it's outside the scope of the document. Maybe it was just never brought up during the meetings. I don't know that you'll get a definite answer on that question.

"The only limits in life are those which we impose upon ourselves."

RE: ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

All of your posted ASTM grades could be considered low carbon steels or mild steels.

RE: ASTM A 53 Gr B / API 5L Gr B - Carbon steel or Mild Steel?

The only time I use the distinction between low and mild carbon steel is as a descriptor in reporting. As Ironic noted, weldability is of more concern and it is defined by specific chemistry, not just the carbon content. There are equations to help you determine weldability to determine if you need to preheat and post-weld heat treat.

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