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

Appropriate conversion of hardness 304L

Appropriate conversion of hardness 304L

Appropriate conversion of hardness 304L

Is ASTM E140 Table 3 (high nickel alloy) the appropriate table for converting microhardness to Rockwell for 304L stainless steel?

RE: Appropriate conversion of hardness 304L

Are you dealing with annealed material?
Or has it been worked to some higher hardness?
And what scales are you trying to convert between?

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Appropriate conversion of hardness 304L

Either cold worked or annealed. I need to be able to convert between microhardness (Knoop/Vickers) and Rockwell.

RE: Appropriate conversion of hardness 304L

For the cold worked material you will need to build your own conversions.
I have never found the tables to be great for that, but you could use the Ni alloy table in a pinch.
I had better luck converting from Superficial Rockwell scales.
For annealed material it is tougher because you usually can't use Superficial Rockwell.
Isn't there a table marked Austenitic Steels? That might be closer for annealed products.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, consulting work welcomed

RE: Appropriate conversion of hardness 304L

Concur with EdS.
I will not accept conversion (ASTM E140) from microhardness to macrohardness. If I must do it I will use a reference block of similar composition in a similar condition.

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

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


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