4140 Tempering Curve
4140 Tempering Curve
(OP)
Hi,
does anyone know if there is data available for a hardness vs temperature curve for 4140 steel at a certain time. I have been looking everywhere and cant seem to find it.
Your help would be much appreciated.
thank you
Paras
does anyone know if there is data available for a hardness vs temperature curve for 4140 steel at a certain time. I have been looking everywhere and cant seem to find it.
Your help would be much appreciated.
thank you
Paras





RE: 4140 Tempering Curve
RE: 4140 Tempering Curve
RE: 4140 Tempering Curve
it is on page 148
http://www.akronsteeltreating.com/images/ast-book....
As for the time: 2 hours at temperature.
As for cooling from tempering temperture:
Air cooled is best. However, if it is not complex geometry or very thin it can be quenched. This won't affect the microstructure but will induce some residual stresses.
Design for RELIABILITY, manufacturability, and maintainability