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

416 SST versus 304 SST in corrosion

416 SST versus 304 SST in corrosion

416 SST versus 304 SST in corrosion

We had some .50" Dia. shafts made out of 416 SST, now we make them from 304 SST.  What is the extent of corrosion protection with the 416 SST material?  I really would not want to recall the 416 ones it all depends on the corrosion protection on how it stack ups againest 304.  The shaft would be exposed to water/rain typically and maybe some brackish water.  Does anyone know the rate of corrosion or how it compares to 304 and how it stacks up againest mild steel?

thanks in advance
Replies continue below

Recommended for you

RE: 416 SST versus 304 SST in corrosion

416 isn't very close to 304 in corrosion resistance. It has only 12 Cr and some of that will be wasted as Cr23C6. It also has that nasty high sulfur.
 In stainless we don't really talk of corrosion rates because you typically chose the stainless so that no corrosion occurs. That will be the case for the 304. I'm afraid the 416 will see significant corrosion, first pitting  and then pretty general corrosion. Sorry.

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


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