Standard 250 grade flat bar at 400degC non pressure part

[rikiraph2]

I intend to use standard 250 grade 32x5mm flat bar as baffles in a jacketed vessel, with thermal oil at up to 400degC in the jacket, it will not be a pressure part or under any significant load. Can anyone for see any problems with this, and should I use BQ plate?

 

[metengr]

Make sure this material has less than 0.35% C by mass if you intend to weld it.

 

[gr2vessels]

I would talk to Bluescope, the flat manufacturer;- they do not support normally this grade above 350 deg C. Also, the AS 1210 is listing this material up to 350 deg C.
Make sure to cover your backside, 400 deg C could be a bit too hot...
cheers,
gr2vessels