There is a problem with the single piece quality of bolts in JB/T4707
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The density of each material is not considered here. The quality of bolts of the same size and different materials cannot be the same, right?
It is given based on the density of carbon steel. The weight of the equipment flange is also very small. The density difference between carbon steel and low alloy steel is generally calculated as 7850. For other materials, just discount it according to the density.