Does hardening change tensile strength
Does hardening change tensile strength
(OP)
Very basic question: does hardening (case hardening) change the tensile strength of the metal.
The metal is a rotating shaft out of Leadloy.
How about hardening the whole thing? Does its tensile strength change by doing that?
Thanks.
The metal is a rotating shaft out of Leadloy.
How about hardening the whole thing? Does its tensile strength change by doing that?
Thanks.





RE: Does hardening change tensile strength
For steels, the relationship between the minimum ultimate tensile strength and the Brinell hardness number is found to be Su=0.45Hb kpsi
from Mechanical Engineering Design by Shigley
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RE: Does hardening change tensile strength
RE: Does hardening change tensile strength
RE: Does hardening change tensile strength
http://www.thomasregister.com/olc/64663032/t15.htm
Here is a link to another one in imperial and metric units.
http://mdmetric.com/tech/hardnessconversion.html
RE: Does hardening change tensile strength
If the steel is a low carbon "mild" steel hardening of the core material hardly takes place. However the addition of assorted alloying elemments results in a steel those core can be hardened to a higher strength. Low carbon, low alloy steels are available for core hardnesses equivalent to 70/80 T/in2.
In general case hardening always hardens the core material because when you quench the case you can't avoid quenching the core.