Question regarding Yield Strenght at elevated temperatures

[CuMo]

Is there a method which could help determine Yield strenght of material (Ferritic alloy steel) at elevated temperature
if only Yield strength at room temperature is known?

Or if I rephrase it:
If we have a piece of steel where Yield values are known from 0 to 1000 deg C
would the trend of Yield strength drop be the same for
a similar steel piece with slightly better Yield strength at room temperature?

Any relevant paper that I can have a look at?

 

[TGS4]

API 579-1/ASME FFS-1 (2016 Edition), §2E.2.1.2.

 

[EdStainless]

It will depend on the strengthening mechanism. If they are the same type of steel and strengthened the same way, then yes you can use the same factors. but if you move from a conventional carbon steel to a micro-alloyed then the mechanisms change and as you get hotter the curves will be different.
You are approaching a temp where all steels have the same strength, regardless of where they started out.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

 

[metengr]

There are other publications, which are free by the way, regarding reduction factors for steel and low alloy steel for tensile properties. See below

http://everyspec.com/MIL-HDBK/MIL-HDBK-0001-0099/MIL_HDBK_5J_139/

 

[CuMo]

Thanks all of you!

I believe TGS4 has answered my question.
The minimum required values for tensile and yield are known to the code: ASME II Part D
Therefore following the statements and factors in
2E.2.1.2 and 2E.2.1.2 and Table 2E.2.1.2 and Table 2E.3
one shall presume that the trend shall be the same
since the table factors remain constant.

I am trying to use actual Yield and Tensile material data of ASME/ASTM material for design
under PD5500 where it is permitted to do so but the material
isn't listed in PD5500 and a derivation procedure of design
stresses needs to be followed.

I looked at ASME II Part D Table 1-100 where similar explanation to API 579-1/ASME FFS-1 (2016 Edition), §2E.2.1.2.
is given but not the whole picture.