降こう伏ふく強きょう度ど

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Meanings

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yield strength; yield stress

The stress at which a material begins to deform plastically. Used in engineering contexts.

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The yield strength of this steel is 400 MPa.

設せっ計けいでは降こう伏ふく強きょう度どを基き準じゅんに安あん全ぜん率りつを設せっ定ていする。

In design, a safety factor is set based on the yield strength.