Are there any requirements for measuring the reduction of area for forgings?
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In clause 6 of 7.8.2 in HG/T20581-2011, for environments with severe H2S corrosion: 1) The chemical composition of the material shall be such that S ≤ 0.003%, P ≤ 0.010%, and Ni ≤ 1.0% ； 2) Reduction of area in the thickness direction of the material: φ≥35% (average of 3 specimens), φ≥25% (minimum value for a single specimen). Question: Regarding this specific requirement of \"2) Reduction of area in the thickness direction of the material: φ≥35% (average of 3 specimens), φ≥25% (minimum value for a single specimen)\", does this apply only to sheets of metal? Is it also required for forgings? Thank you; those who have done this or have experience, please offer some guidance. Thank you.
This post was last edited by gn_1984 on 2018-10-16 at 10:46. Does the forging factory claim that it’s impossible to determine the reduction of area for forgings, or do they simply not want to do it? Does this requirement in HG/T21581-2011 apply only to the sheets? Aren’t pipes and forgings produced? Those with experience and a theoretical foundation, please offer some guidance. Thank you.