metal properties
metal properties
(OP)
does anyone know typical impact proerties for cast 4140 steel, heat treated to 35 Rc range?
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS Come Join Us!Are you an
Engineering professional? Join Eng-Tips Forums!
*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail. Posting GuidelinesJobs |
|
RE: metal properties
Look at matweb.com
Input 4140 in the search bar. I assume that the heat treatment is a Q&T? Look around in the 900F - 1000F tempering range for a matching hardness, though if the test temperature is not within a few degrees of your service temperature, then the impact properties do not apply to your application.
HOWEVER:
1) I would avoid using cast materials for impact loading. Use a forged material.
2) If you cannot avoid the use of a casting for your application, use an alloy with a higher nickel content like 4340 or 6820. Nickel does a lot to improve toughness, although 8620 cannot be hardened through Q&T.
Engineering is not the science behind building. It is the science behind not building.
RE: metal properties
Matt Lorono
Lorono's SolidWorks Resources & SolidWorks Legion
RE: metal properties
RE: metal properties
Unlike UTS and YS, you cannot dial in a hardness and expect a correlation to either impact strength, elongation, RA, fx toughness, etc. It all depends on the microstructure: phases present and the morphology. These are dependent on the path taken to get to 35 HRC or other (steelmaking process, chemistry, refining, HT). A good reference is ASM Hdbk, Vol 1. Also ditto what EngineerTex said, plus lower carbon, e.g. 4130.