20MnCr5 Steel fatigue file index :
Created Jun17 2018 Update: Sep.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.
Cooling Controlled by Section Size
- Objective:
"To look at core properties where we varied the hardness by changing the size
of the sample that was heat treated. Test specimens were machined from the
heat treated bars of different diameters. A larger sample with more mass will
have a lower hardness after quenching than a smaller sample, when both are made
from the exact same steel." G.F.
- 20MnCr5 series: Section Controlled Cooling,
60.9mm Bar, Bainite= 10% Martensite= 50% Ferrite= 40%
HRc= 28
- 20MnCr5 series: Section Controlled Cooling,
27.9mm Bar, Martensite= 100%
HRc= 32
- 20MnCr5 series: Section Controlled Cooling,
15.2mm Bar, Bainite= 5% Martensite= 90% Ferrite= 5%
HRc= 42
- Compare Plots: Section Controlled Cooling
20MnCr5 Thru Carburized (Vacuum)
-
20MnCr5_SimulCarb. Case Axial CA BHN=653 HRc=60
(AISI It 170 )
Specimen cut from 46.4mm bar, machined, then thru Vac. Carburized
20MnCr5 Rotating Bending Specimens
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