×
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

Casting Bi-Metal Babbitt
2

Casting Bi-Metal Babbitt

Casting Bi-Metal Babbitt

(OP)
Cannot locate solidification shrinkage data for ASTM B23 Alloy 2 [Tin base] Babbitt. Does anyone have a quick resource or better yet..value. We static cast due to config. and want properly sized riser for new component [big - lots of babbitt].

RE: Casting Bi-Metal Babbitt

If you can't obtain the shrinkage data, there is another option. You can use the information below to approximate volumetric or linear shrinkage for casting the babbit.

ASTM A 23 Type 2 babbit contains 88-90% tin, 7-8% antinomy, 3-4% Copper and less than 0.35% lead.

The following information was obtained from several sources that I have;

For pure tin,  linear shrinkage is 0.6%, volumetric shrinkage is 1.2%

For copper, linear shrinkage is 2%, volumetric shrinkage is 7%.

I don't have specific data for antimony. Using the laws of mixtures, you can take for (tin) 0.9* shrinkage % + (copper)0.035 * shrinkage % and for antimony use a value similar to tin (0.075* shrinkage for tin) = shrinkage % for babbit.

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