×
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!
  • 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

Jobs

Alloy 20 Thermal Expansion

Alloy 20 Thermal Expansion

Alloy 20 Thermal Expansion

(OP)
Alright, I've googled until my eyes bleed with no luck.  I have an Alloy 20 duct system that I am specing out an expansion joint for.  I cannot for the life of me find a reference on what the thermal expansion of this material is.

If someone in the group has a table, or a source for a table, I'd appreciate finding out what the rate is at 600 and 800°F

Thanks,

Edward L. Klein
Pipe Stress Engineer
Houston, Texas

"All the world is a Spring"

All opinions expressed here are my own and not my company's.

RE: Alloy 20 Thermal Expansion

(OP)
Looks like I finally tracked it down at the Carpenter Technology website

http://www.cartech.com/index.html

The setup is such that I can't make a direct link (frames, I think).  From the main page, go to "Technical Information" over on the left side.  Click on "Alloy Name Search" and put in 20.  Alloy 20 will be the second result "20Cb-3 Stainless"

Enjoy,
--ED

Edward L. Klein
Pipe Stress Engineer
Houston, Texas

"All the world is a Spring"

All opinions expressed here are my own and not my company's.

RE: Alloy 20 Thermal Expansion

Hi Ed,

I have the following data from an old brochure for Carpter 20Cb-3 Stainless and it matches the data on their site.

77 F to    25 C to    in x 10e-6/Deg F
212        100          8.16
572        300          8.62
662        350          8.71
752        400          8.76
842        450          8.84

Hope this helps.

Kevin

NozzleTwister
Houston, Texas

RE: Alloy 20 Thermal Expansion

BTW, you need to register on the Carpenter website to access the data.

NozzleTwister
Houston, Texas

RE: Alloy 20 Thermal Expansion

unclesyd,

I had that too but didn't post it since StressGuy only asked for 600F and 800F.

Confirm that you have a typo for 842F, the number should be 8.84 instead of 5.84.

I also have an old paper from Carpenter Technology dated 10/76 that has coefficients different from what they publish today.

NozzleTwister
Houston, Texas

RE: Alloy 20 Thermal Expansion

I have one extra value from some very old literature.  

77°F-212°F      8.16
77°F-842°F      8.54
77°F-1652°F    9.53

NozzleTwister,
I too have numbers that are slightly different If I recall correctly that there were two alloys at one period of time as I have some engineering data that says Alloy 20 and some from about the same time that says Alloy 20-3Cb.




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!


Resources