410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
(OP)
I'm using 410 CRES in a design, and I want to use it in a heat treated condition Rc35 approximately, which equates to about 160ksi ultimate tensile strength. To acheive this condition, 410 is tempered at 540 deg. celsius after it has been austenitized.
Here's my question: I want to define the heat treat process using AMS 2759/5C, however it for some reason does not recomend using 410 tempered at 540 deg. celsius. Why is this? The specification warns to avoid tempering 410 CRES in the 371-538 deg celsius range. Why again? I have many material specs from vendors of 410 CRES at a 540 temper, which suggests to me that it is commonly used at this temper. If 410 shouldn't be tempered at 540*C, why are all these specs available for 410 CRES at 540*C? I am wondering if anyone knows why the 371-538 deg celsius range should be avoided.
Thanks!
Here's my question: I want to define the heat treat process using AMS 2759/5C, however it for some reason does not recomend using 410 tempered at 540 deg. celsius. Why is this? The specification warns to avoid tempering 410 CRES in the 371-538 deg celsius range. Why again? I have many material specs from vendors of 410 CRES at a 540 temper, which suggests to me that it is commonly used at this temper. If 410 shouldn't be tempered at 540*C, why are all these specs available for 410 CRES at 540*C? I am wondering if anyone knows why the 371-538 deg celsius range should be avoided.
Thanks!





RE: 410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
RE: 410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
There is quite a lot metallurgy involved so come back if you have any specific questions
RE: 410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
RE: 410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
RE: 410 Stainless, why not UTS=160ksi if HeatTreat per AMS 2759/5?
I should clarify, the reason I need a 160ksi strength is I plan to threadroll this part, and it needs to stay below Rc40 to facilitate the manufacturing process.
Thanks you all for your replies.