Operating temperature of 15CrMo vessels under external pressure conditions
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When calculating the axial compressive stress under external pressure conditions, the B value is required; for 15CrMo, the maximum curve temperature taken for determining this value is 475°C. However, the allowable temperature for 15CrMo is 550°C, and there are already engineering examples of its use at this temperature. So, when checking this axial compressive stress, how should the value of B be selected, or what other methods can be used for verification?
This post was last edited by zhangjuhua on 2015-7-21 at 20:53. The curve temperature should be selected based on the B value, rather than using the temperature applicable under normal pressure conditions
The B-value curve is obtained through experiments, not through calculations; therefore, if it is not shown in the graph, it cannot be used