20MoCr4 Steel fatigue file index :
Created Jun17 2018 Update: Jun19-2018 Jan2019
Note! :
The files in this directory are offered by the AISI Bar Fatigue committee
members as a set of example files for the construction of
web based material fatigue property databases. They are meant
for information and research use only, not for design.
A Comparison of Vacuum and Atmosphere Carburization
- AISI Blog:
https://barfatigueblog.org/2018/04/
- Processing:
Iterations 137,138 were Atmosphere through carburized using the
traditional 927 C, twenty-six hour cycle which provided a
surface hardness of 61 to 64 HRC and a core hardness of 55 to 60 HRC.
Iteration 141,142 was vacuum through carburized using a thirty-six
hour cycle at 927 C, which provided a uniform carbon content
and a uniform hardness through the entire cross section.
- 20MoCr4 series: Atmosphere Carburization Core
30mm Bar, Bainite= 10% Martensite= 85% Ferrite= 5%
HRc= 35
- 20MoCr4 series: Atmosphere Carburization Case
30mm Bar, Bainite= 10% Martensite= 85% Ferrite= 5%
HRc= 59
- 20MoCr4 series: Vacuum Carburization Core
30mm Bar, Bainite= 60% Martensite= 30% Ferrite= 10%
HRc= 35
- 20MoCr4 series: Vacuum Carburization Case
30mm Bar, Martensite= 100%
HRc= 60
- Compare pLots:
Back to Steel Index
Back to Materials Index
