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18MnCr Ti material ??

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Patrick618

Mechanical
Dec 12, 2008
6
US
Does anyone recognize what material grade this is?

 
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looks like a HSLA?
Will check the Stahlschlüssel at work on monday...

Did not find anything in Engineering Materials: properties and selection by Budinski...
 
Nothing listed with the Ti suffix in my references. Are you sure about the Ti suffix?
 
Pls. check again. Nothing listed. Looks like a German spec. Any material # (Werkstoffnummer) listed? They look like 1.xxxx
Could also be Rumenia.
 
Here is the material list from WinSteel. This list is quite extensive and lists several varieties of 18MnCr but no 18MnCr Ti. Is it possible that someone misread 18MnCr 11 for the Ti part.
Several references refer to these steel as case hardening varieties.

 
I found a British company, John King Chains by Googling on the spec number and found a pdf file which explains how they use this grade of steel for their chains.

"Manganese Alloy Steel (18MnCr B5)
Case Hardened (MN Grade)"

although the Ti designation was not included.

Also, I found a reference to it (18MnCr) in a book on Google Books titled, "Smithells Metals Reference Book, Eighth Edition" but as you know the Google books are so fuzzy you can't read anything, so I looked it up on Amazon and found it. It had the "Look Inside" feature so I was able to find the same page (Table 22-50) and copy it off.

It is shown as a material spec for Forged or Rolled Steels and their mechanical properties. It is a steel with the DIN requirement of X40MnCr18. It gives the composition and other properties and in the "Remarks" column it says, "Non-magnetic end bells for alternator rotors."

I hope this helps
Frank Reid
 
As promised above: The "Stahlschlüssel" mentions several 18MnCr steels, however none with the Ti suffix.
That would either mean it's tailor-made (not according to any publuc-known (ASME/Din) regulations or specifications), or it doesn't exist :)
 
German standard high strength low alloy steels for case hardening include
16MnCr5 (0.16%C, 1.25%Mn, 1.1%Cr)
20MnCr5 (0.2%C, 1.25%Mn, 1.1%Cr)
18MnCrB5 (0.18%C, 1.25%Mn, 1.1%Cr, Boron treated)
Widely used for forged chain links in bulk materials handling.
 
Chinese!
See posting on "Metal and Metallurgy" this forum for 20MnCrTi.
The difference in Mn is meaningless.
 
Well, this makes better sense

20CrMnTi A26202
looks like a Chinese low alloy steel sheet grade or a slight modification with copper addition falls under cold drawn steels for industrial chain

C 0.17-.23 mass %
Si .17-.37
Mn 0.8-1.0
P 0.035
S 0.035
Cr 1.0-1.30
Ni 0.30 or less
Ti .04-0.10 (Cu 0.30 or less)
 
This is going off on a tangent but, You mentioned 20CrMnTi.
We have been getting gears made from this alloy. We are starting to see failure not on the gear teeth but on the bearing journal. In the past we have been using 8620 or 4320. Does anyone have any expreience with these different alloys. The application is for hydraulic pumps and motors.
We case harden and oil quench followed by -100 F treatment.
The case is .04 to .05 deep after grind.

 
edendebrock;
Please start a new thread. Also, when you post the new thread, please state what type of bearing journal damage. This would help in obtaining better responses.
 
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