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preamble_5766

6.7.4.3.3. For metals exhibiting a clearly defined yield strength or characterized by a guaranteed proof strength (0,2 % proof strength, generally, or 1 % proof strength for austenitic steels) the primary membrane stress σ (sigma) in the shell shall not exceed 0,75 Re or 0,5 Rm, whichever is lower, at the test pressure, where:

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Source: EUR-Lex (Cellar) · retrieved 2026-10-31 · Text as adopted (Official Journal); later amendments are not incorporated in this text.