Bending Cr-Mo-V steel plate
Bending Cr-Mo-V steel plate
(OP)
I am dealing with bending of a plate made of SA542D Cl.4 (21/4Cr-Mo-V), tempered at 1250°F (680°C), to make a cilyndrical shell.
The late is 51/2in. (138mm) thick and we cannot roll at a low temperatures such as 360-400°F (180-200°C) since the needed loads would be too high for our machinery.
Our customer suggests to bend at 900-1020°F (480-550°C) but as far as I'm concerned temper embrittlement is likely to occur in this temperature interval.
My suggestion would be to bend at approximately 1100°F (693°C) to avoid temper embrittlement.
Is that correct?
Can anyone give me tensile and yield strength data for this material in the 900-1100°F interval?
Thanks
The late is 51/2in. (138mm) thick and we cannot roll at a low temperatures such as 360-400°F (180-200°C) since the needed loads would be too high for our machinery.
Our customer suggests to bend at 900-1020°F (480-550°C) but as far as I'm concerned temper embrittlement is likely to occur in this temperature interval.
My suggestion would be to bend at approximately 1100°F (693°C) to avoid temper embrittlement.
Is that correct?
Can anyone give me tensile and yield strength data for this material in the 900-1100°F interval?
Thanks





RE: Bending Cr-Mo-V steel plate
http://www.btwcan.com/html/ppf8.html
As for your application, I would agree that you need to form using the higher temperature of 1100 deg F because the Cr-Mo-V materials tend to exhibit higher strength at elevated temperature as a result of vanadium carbides. Also, the 1100 deg F temperature is well below the original tempering temperature.
The yield strength for this material at 900 deg F is 47.8 Ksi based on information from Table Y-1 of ASME Section II, Part D. There are no reported values in this Table above 900 deg F because Section VIII limits this material at 900 deg F.
You might find the document below interesting information on 2.25%Cr-1% Mo-0.25V alloys;
www.pg.gda.pl/mech/kim/AMS/022003/ams022003004.pdf