Designation of pressure vessel stud materials
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GB/T3077-2015 is about to come into effect, and this standard eliminates the grades marked with a ‘A’. For example, 35CrMoA in GB150 becomes 35CrMo in GB/T3077-2015; should it therefore be denoted as 35CrMo according to the new standard?
It should be labeled according to the new standards...
Use the appropriate standard and indicate it accordingly!
I see now; GB/T3077-2015 also lists 35CrMoA, and it should be designated using the grade specified in GB150
What do you write for the bolt standard when making the notation? Write 150? Write 3077? Neither, it should be written as HG/T20613; and according to standard 20613, it is 35CrMo, so. . . Actually, there’s no need to worry about it; such things have no real impact.