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

What causes Galling???

What causes Galling???

What causes Galling???

I would like some technical information on the galling phenomena.  Why is it that some metal combinations gall (stainless on stainless) and some do not (stainless on monel).  What makes monel a "non-galling" material?  Is it perhaps the chemical make-up, high nickel?
Replies continue below

Recommended for you

RE: What causes Galling???

Galling is basically the bonding of the one surface to another. This normally occurs when the surfaces are under load together. When the surfaces move, pieces of the surface break away at some other position other than the original surface. To summarise galling occurs.

If you need more info there are many books and papers. Look under the topic of Tribology or surface wear.

Hope this helps


RE: What causes Galling???

To quote Mr. Tony Sofronas of ExxonMobil Chemical Co. from an article in Hydrocarbon Processing / June 2001.
Case 3: Shaft galling in a bushing
"Galling is a sort of welding of one part to another.  For it to occur there usually has to be sufficient force along with materials that are susceptable to galling.  Lack of lubrication increases the tendency to gall."
There is a table in the article that I have summarized as follows...Soft metals on soft metals likely to gall.  Hard metals against soft metals, possible.  Hard metals against hard metals, not likely.

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