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4140 processing

4140 processing

4140 processing

(OP)
What's the difference between "4140 quench & temper" and "4140 heat treat & stress relieved"?  I thought the terms were interchangable but my suppliers seem confused.

RE: 4140 processing

4140 heat treat and temper though not a scientific term might mean normalize and temper. The other term refers to a faster rate of cooling in oil or water or polymerfollowed by a tempering cycle.

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RE: 4140 processing

(OP)
so the term "heat treat and stress relieve" is too loose a term?

RE: 4140 processing

Yes. Heat treat is a common term used for annealing.normalising,tempering solutionizing,etc. What process is exactly followed has to be specified.

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RE: 4140 processing

Go to http://www.matweb.com and search for 4140 steel. 32 results. Note the wide range of tempering temperatures.  A lower tempering T will give greater strength but less ductility (elongation at break). Click on any listing to see the properties and specifications (ASTM, BS (UK), DIN, JIS, SAE AMS, etc.).

RE: 4140 processing

(OP)
Great, thanks for the help.

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