Abstract
13MnNiMoR is a low-alloy high-strength steel. It is a medium-temperature medium-pressure boiler and pressure vessel steel. It has been provided in the manufacture of high-pressure heater, nuclear energy vessels and other high-pressure resistant vessels. In this paper The mechanical properties of 13MnNiMoR at different temperatures is systematically studied. It is shown that the yield strength of the material decreases with the increase of temperature. The mechanical properties of the material have little difference after 200 °C. The prediction formula of the material in the range of 20~350 °C is obtained by double-fold line, which could be effectively predicted. It is useful to improve the accuracy of the analytical design consequences, and provides a data basis for the revision of subsequent material standards.
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