×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

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

Stainless Steel and Anti-Galling Lubricants
4

Stainless Steel and Anti-Galling Lubricants

Stainless Steel and Anti-Galling Lubricants

(OP)
I am trying to determine if Colloidal Graphite in Isopropanol (MIL-L-24131) [CGI] can be used with stainless steel to prevent thread galling.  

I must follow the guidance in NSTM [Naval Ships Technical Manual] CH 075 but it is unclear whether the use of CGI must be limited to stainless steel in applications <1000 deg.F or whether CGI should not be used at all with stainless steel.

I have tried numerous internet searches but have not been able to find clarification regarding this specific issue.  Even if you are not familiar with the specific military references, any information/experience in private industry would be appreciated.

RE: Stainless Steel and Anti-Galling Lubricants

Seems like very few things can prevent galling of SS like 304/316.  Graphite is only a so-so dry lube anyway.  If you are able to change the SS then consider something like Nitronic 60.

RE: Stainless Steel and Anti-Galling Lubricants

2
The 1000°F is upper temperature limit due to the oxidation of the graphite. MoS2 has various upper limits from 700°F-850°F depending on its use.

A better anti-seize would be one based on Boron Nitride, White Graphite.  We used this type lubricant very suscessfully on S/S and Ni alloys at 1250°F.  Our specification was to use this material above 900°F.

Also the silver base lubricants worked better at your temperature than the copper based ones.

RE: Stainless Steel and Anti-Galling Lubricants

(OP)
unclesyd,

Thanks for the info.  I need to be able to formally reference the info you passed along- now that I know why colloidal graphite is not used for high temperatures, do you know where I can find that info, either on-line or a reference book??  Thanks :)

RE: Stainless Steel and Anti-Galling Lubricants

stevenpf,

You should perform a site search here at Eng-Tips for this subject as it has been covered extensively.  For example, this thread:

Thread404-32366

has good references.  Look at everything posted by member Kenneth.

Regards,

Cory

Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.

RE: Stainless Steel and Anti-Galling Lubricants

Way back in the 1970's I was working with superalloys, and one of the tests we ran for hi-temp. coatings involved a kerosene-fueled "burner-rig".  Small test bars were installed in a rotating holder and secured with a superalloy screw-about 5/16" dia., IIRC.  The screws were dipped in regular (not mint flavored) Phillips milk-of-magnesia, which was the only thing found that would allow their removal after everal hundred hours of running at ~1,200 deg. F (screw temp., test bars were running up to ~2,200 F.).




RE: Stainless Steel and Anti-Galling Lubricants

Steve,
   I posted a solution for galling in another thread.  Thread338-52413   Galling on stainless steel thread under seawater condition.   Try there!

LeGrande

RE: Stainless Steel and Anti-Galling Lubricants

Metalguy,

I'll bet you used "Sloan's Liniment" as penetrating oil too.

RE: Stainless Steel and Anti-Galling Lubricants

Unclesyd,

Never heard of Sloan's.  I also learned that the last thing to use on those screws was any kind of pene. oil-they would always seize and break right off when I tried to loosen them if I tried oils.  However, for some reason I can't remember I never tried one of the nickel anti-seize compounds.  The MgO worked well enough, and I had a big supply of screws.

IIRC the threaded holder was N-155, but I can't remember what the screws were-other than expensive.

RE: Stainless Steel and Anti-Galling Lubricants

Metalguy,

Sloan's was a liniment that had an oil of wintergreen base.
Oil of wintergreen is very good penetraing oil as it has a very low surface tension. I first saw it used on AC steam turbine casing bolts.
  
We had thousands of B-7 bolts that had to undone while cooling from 600°F during an overhaul. To faciltate there removal the bolts were DAGed(collodial graphite) prior to installation.  It was found that the application of a little penetrating liguid (Sookie, SPS, etc.) would faciltate thier removal. On S/S we used a copper based lubricant and usually had no problems.

RE: Stainless Steel and Anti-Galling Lubricants

what you are looking for is called neolube.  

RE: Stainless Steel and Anti-Galling Lubricants

Punh3,

IIRC Neolube is graphite in acetone or alcohol, and Unclesyd has already pointed out it's temp. limit.

From use at our plant we also learned there are better antisiezes for 600 deg F.

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



News


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