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Anonymous Poster

What Material is This?

10/16/2008 2:30 PM

Dear friends:

I have a iron based material has the following chemistry: C: 1.2%; Mn 0.38%; P 0.039%; S 0.36%; Si 2.41%; Ni 0.39%; Cr 32.12%; Mo 1.99%; Cu 0.03%; Al 0.092%; B 0.0014%; Ti 0.02%; Cb 0.1%; V 0.08%; and Fe balace; Could you tell me what is the possible material is this? This is a material used in a bearing. Thanks!
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Duckinthepond
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#1

Re: What material is this?

10/16/2008 3:12 PM

Offhand I'd say it's a complex chromium carbide.

What was the bearing used for?

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TVP45
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#2

Re: What Material is This?

10/16/2008 6:25 PM

Did you look on matweb?

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jasonzen
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#3

Re: What Material is This?

10/16/2008 10:59 PM

Hi, looks like the "Carbon Steel", do you use ABEC bearing?

This should be referring to the overall material of this bearing, similar to stainless?

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RHABE
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#4

Re: What Material is This?

10/17/2008 2:08 AM

Ball-bearings - if stainless - are from 440C.

That has "only" 17% Cr.

What type of bearing in which application had the unknown material?

RHABE
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Anonymous Poster
#5

Re: What Material is This?

10/17/2008 2:21 AM

Dear ;-)

Please don't investigate our materials, THIS IS ABSOLUTLY KNOW-HOW !!!

No regards
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Nigh
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#6

Re: What Material is This?

10/17/2008 4:42 AM

The elements seem to fit with a chrome/moly steel with the chrome at the high end of the range. That would seem feasible for a bearing.

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Kwetz
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#7

Re: What Material is This?

10/17/2008 4:44 AM

According to the chemical composition it's a steel (not chromium carbide, even obviously they are in the microstructure), and must be stainless, rather martensitic and wear resistant what is expected in bearing steels, but I don't know a standard designation with such a high content of Cr.

Obviously you are in the US or made there the analysis because the use of Cb (Columbium) symbol instead of the IUPAQ official Nb (Niobium)

Kind regards

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sidevalveguru
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#8
In reply to #7

Re: What Material is This?

10/17/2008 6:01 AM

When i was in the US bearing industry, one of the major Japanese houses announced a proprietary grade of steel "better than 440C". This might be one of those.

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Kwetz
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#9
In reply to #8

Re: What Material is This?

10/17/2008 8:23 AM

Yes, it's one of the possibilities I considered because in my materials data I've found no similar C-Cr content.

Thank you

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ferquiza
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#10

Re: What Material is This?

10/17/2008 9:59 AM

Try this: type 446 stainless steel from republic steel corp.-
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Kwetz
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#11
In reply to #10

Re: What Material is This?

10/17/2008 3:33 PM

Type 446 SS has a maximum C of 0,2 and not of 1,2 and the Cr content is lower too:

Carbon0.2 max
Chromium23 - 27
IronBalance
Manganese1.5 max
Nitrogen0.25 max
Phosphorus0.04 max
Silicon1 max
Sulphur0.03 max

It doesn't seem the same steel.

Kind regards

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ferquiza
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#12
In reply to #11

Re: What Material is This?

10/17/2008 8:25 PM

Wright, it was the closest i had to that quantity of chrom in that moment then following the suggested above think matlab is the widest answer.-
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