ステンレス鋼のPREN照会
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各種ステンレス鋼の耐食性パラメータであるPREN値は、どこで確認できますか？
標準的な元素含有量で計算した
例えばASTM A890におけるPERN値は、規格では40以上でなければならず、計算式は%Cr+3.3%Mo+16%Nが40以上であることです。
はい、ありがとうございます！他の場所でもこのような式が見られる：PREN=%Cr+3.3×(%Mo+0.5×%W)+16×%N
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