1090 Steel question
1090 Steel question
(OP)
I think i have 1090 steel, the 850 degree C water quench gave an HRC hardness of around 63. What i am looking for is how to obtain a Charpy value of 20 J. I need a heat treatment process or a relative hardness to obtain this.





RE: 1090 Steel question
RE: 1090 Steel question
If it's an experiment a long temper at 650 C to reduce the hardness to around 22Rc might get you there, if it's for a component change the material!
RE: 1090 Steel question
RE: 1090 Steel question
You can try to temper the quenched specimen at 1250 deg F for 1 hour and run a Charpy impact test. With this carbon content, you would be lucky to reach 7J at ambient temperature.
RE: 1090 Steel question
You can have a start off with oil-air-brine solution/water...However, do keep in mind that you will need to keep in mind that time taken for each quench varies, and to find the perfect time, is through trial and error.
Good luck.