Problems with ferritic steel?
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HG/T20592, page 20, top section 3) Ferritic steel forgings with a nominal pressure greater than PN16 and an operating temperature of less than or equal to -20°C. It shall meet the requirements of Grade III or above. What are the common ferritic steels used in pressure vessels?
Refer to 4.2.3 in GB150
In Li Shiyu’s book, there are classifications of various steel grades such as ferritic, pearlitic, bainitic, austenitic, and martensitic steels.
In short, aside from austenitic and martensitic stainless steels, most of the steel materials used in the pressure vessel industry are normalized or as-rolled low-carbon steels and low-alloy steels, all of which are ferritic steels
Could you take a photo of common low-alloy steels and share it so that everyone can learn from it?
I don’t have that book with me right now. Search online; it’s available in the materials section.
Training Manual for Pressure Vessel Design Engineers (Li Shiyu) https://bbs.hcbbs.com/thread-1557202-1-1.html (Source: Haichuan Chemical Industry Forum) Is this it?