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

rusty 17-7 springs?

rusty 17-7 springs?

rusty 17-7 springs?

Hi all,
I just received some springs from vendor that appear to have a rusty finish... the bag is covered in orange dust. Springs are supposed to be 17-7, and vendor provided a copy of the cert when requested.

My print says "17-7 treated to H900 after coiling". I realize now that it should be CH900... I crossed accidentally used my old 17-4 heattreat specs...
Is the CH900 different process, or is the C reference to the C in the 17-7?

(also asking the vendor, but it always helps to have a 2nd opinion)


RE: rusty 17-7 springs?

As far as I know, there is no such thing as 17-7 PH condition H900, only CH900. The condition A material is cold worked to condition C and then heat treated to condition CH900. The springs should not be rusty. 17-7 is not the most corrosion resistant stainless but it's generally considered to have good corrosion resistance.


The Help for this program was created in Windows Help format, which depends on a feature that isn't included in this version of Windows.

RE: rusty 17-7 springs?

Thx dgallup. this was my assumption. I've only worked with 17-7 a couple times, and it was a few years ago. Was doubting my memory.

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


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
The Great Project Profitability Debate
A/E firms have a great opportunity to lead the world into the future, but the industry’s greatest asset—real-time data—is sitting wasted in clunky, archaic ERP platforms. Learn how real-time, fully interactive dashboards in a modern ERP allow you to unlock data that will shape the future of the world. 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