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asheshdehi
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Difference between SS CF8M and SS CF8C

04/08/2013 2:36 AM
Hi,

Can anyone tell me what is difference between CF8M and CF8C,

which one has a higher corrosion resistance in seawater and low Temperature?

Thank you,
Omid

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PWSlack
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#1

Re: Difference between SS CF8M and SS CF8C

04/08/2013 3:24 AM

Yes, anyone can - anyone who can use an internet search engine. A Google search on the properties of those two materials will reveal all.

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#2
In reply to #1

Re: Difference between SS CF8M and SS CF8C

04/08/2013 8:06 AM

I was going to point out the difference is that one ends in an "M" and the other ends in a "C". Your answer is much better. The OP should keep in mind that if the manufacturer of these two cryptic parts presents data that the OP does not understand then we will gladly discuss the meaning.

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PWSlack
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#3
In reply to #2

Re: Difference between SS CF8M and SS CF8C

04/08/2013 8:25 AM

There is so much technical information so readily available these days.

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Holzfeller
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#4
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Re: Difference between SS CF8M and SS CF8C

04/08/2013 11:12 AM

The crazy thing is that it is actually quicker to google than to ask the question on CR4.
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PWSlack
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#5
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Re: Difference between SS CF8M and SS CF8C

04/08/2013 11:15 AM

Absolutely! Have a GA.

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Holzfeller
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#6
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Re: Difference between SS CF8M and SS CF8C

04/08/2013 12:03 PM

Ta.
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lyn
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#7

Re: Difference between SS CF8M and SS CF8C

04/08/2013 12:16 PM

I believe that a Google search screen shot should be required before inane questions like this one and the many others we get daily are even considered for answering.

Search Results

  1. Stainless Steel, cf8, cf3, cf8m, cf3m, ca15, ca40, 17/4, 15/5, cd4m 1a ...
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asheshdehi
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#8
In reply to #7

Re: Difference between SS CF8M and SS CF8C

04/09/2013 12:32 AM

Hi,

In my opinion, This is not the right way to answer the my question. I know how to use an engine search and this is not inane questions. I have downloaded Table Link, previously. Can you show me where is presented applications temperature of this two grades in the table ? also what is the differentiation in application according to the table between this two ? or can i use CF8M instead of CF8C or opposite ?

i am telling you that i cant find answer according to this table.

i would be so glade to here your answer about this problem.

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lyn
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#9
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Re: Difference between SS CF8M and SS CF8C

04/09/2013 9:05 AM

CF8M is a form of 316 Stainless SteelAs to the designation - C (first letter) means the service it is intended to be used in this case - corrosion resistant service , F(second letter) -The second letter indicates the approximate location of the alloy on the iron-chromium-nickel (FeCrNi) ternary diagram. For users familiar with the diagram, the second letter does provide an indication of the nominal iron, nickel, and chromium content, but most people would have to obtain alloying information from a material specification. 8M - the third and fourth digits represent the maximum permitted carbon content in units of 0.01% (e.g., CF8M has a maximum of 0.08% carbon)

ASTM A351-CF8M Spec.

Chemical composition
CCrNiMoAltriHeat treatment(1)Microstructure (2)
CF20< 0.2019.59.5--Sa
CF8< 0.0819.59.5< 0.5-Sa, (f)
CF8A< 0.0819.59.5< 0.5-Sa, (f)
CF8C< 0.0819.510.5< 0.5Nb>8x%CSa, (f)
CF3< 0.0319.010.0< 0.5-Sa, (f)
CF3A< 0.0319.010.0< 0.5-Sa, (f)
CF8M< 0.0819.510.52.3-Sa, (f)
CF8MNb< 0.0819.510.52.3Nb>8x%CSa, (f)
CF3M< 0.0319.011.02.3-Sa, (f)
CF3MS< 0.0319.013.52.7-Sa
CF3MN< 0.0319.011.02.30.15NSa
CF16F< 0.1619.510.5< 1.5S, (P), (Se)Sa, (f, i)
CG8M< 0.0819.511.03.5-Sa
1.4439< 0.0317.513.54.50.17NSa
CK20< 0.2025.020.5< 0.5-Sa
316HP< 0.0721.09.02.30.12NSa, (f)
316LHP< 0.0321.09.02.30.12NSa, (f)

CF8C-PLUS - Oak Ridge National Laboratory

CF8C is the better material for high temperature.

Now, I hope you can figure the rest out by yourself.
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