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!
  • Students Click Here

*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


13-Chrome Stainless Steel question

13-Chrome Stainless Steel question

13-Chrome Stainless Steel question

Can someone help me understand the different grades and make sure I am using the correct names/UNS numbers?

I think I have this one correct:
13-Chrome Modified (ex: UNS S41000, S42000)

I think this is correct as well:
Super 13-Chrome (ex: UNS S41425)

I don't know if these are named correct and don't know a UNS #:
13-Chrome Hyper 1 or Super 13-Chrome Hyper 1
13-Chrome Hyper 2 or Super 13-Chrome Hyper 2

Any information/website addresses would be greatly appreciated.

RE: 13-Chrome Stainless Steel question

These names are non-standard -- part description and part advertising spiel.  Don’t specify their use, you will be at the mercy of a single supplier.  Use composition (UNS no. if available) and properties.

UNS 41000 is simply AISI 410, a martensitic stainless of 0.15% C and 11.5-13.0% Cr, without any nickel content.
UNS S42000 is AISI 420, with min 0.15%C and 12.0-14.0% Cr.

UNS S41425 is a non-AISI grade, of 4.5% Ni, 13% Cr, 1.5-2.0% Mo, 0.005% max S, 0.025% max P, 0.02% C, 0.5% max Si, 0.5-1.0 Mn, 0.08% N, 0.06% Cu.  It appears to be a “supermartensitic” stainless steel.  

Supermartensitic Stainless Steels
“The new type of weldable martensitic stainless steel grades combine high strength, good corrosion resistance in sweet or mildly sour environments, and acceptable fracture toughness down to - 40 C.”  For further info on supermartensitic stainless steel, compositions and suppliers, see http://www.stainless-steel-world.net/supermarten/grades...

RE: 13-Chrome Stainless Steel question

Besides the martensitic grades, there are ferritic grades that are 13% chrome as well.  These ferritic grades grades are specifically designed for enhanced magnetic properties.  I do not believe there is a UNS number for these grades.

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!


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