Cracking when rolling P91 material?
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The pressure vessel manufacturing company where my friend works has a pressure vessel made of P91 (SA-335 P91 Fe-5B-2). The outer diameter of its cylinder sections is 1118, with a thickness of 36; it cracked right away during the rolling process I hope the experts here can give some advice? What is the reason? How to carry out process control? Critical process?
Note: It’s not a crack in the weld, but rather a flaw in the material itself; it cracked during rolling, even before the welding process took place. After the materials arrived at the factory, the bending test was successful
Generally, domestic container plates aren’t that poor
The steel plates we encountered in Wuyang have all cracked. There is still a problem with the quality of the Plates.
I also think it’s a problem with the steel plate itself, but I wonder: are there any special requirements for processing this type of material? Do the tube section specifications I described require hot rolling?