At operating temperatures above 400 °C, it is necessary to test which stainless steel can be used, taking into account both the components of the media and the operating conditions. 1.4541 or 1.4571 can be considered up to temperatures of approximately 500°C, e.g. during continuous operation and with a dry medium. Alternatively, 1.4828 and 1.4841 can be used (these are high temperature stainless steels that can be used for temperatures reaching up to approx. 800° – 900°C). Such temperatures occur for example in engine test stands or in furnace technologies.