-S30408 stainless steel at 200°C, under non-low-temperature and low-stress conditions
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Hello, teachers! There is a device with a design temperature of -200°C, made of S30408 material, and it is not operated under low-temperature and low-stress conditions. What issues should be taken into consideration during its design? There is already a weld evaluation for S30408 at room temperature; is it necessary to add an impact test? What is the increase needed to raise the impact value? Thank you!
It refers to equipment operating at low temperatures; the requirements specified in the appendix of GB150.3-2011 apply.
An increase in low-temperature resistance is certain, but generally it is required to be used at temperatures above -196°C (with liquid nitrogen); where did this -200°C figure come from? What medium?
Must the design temperature be -200°C? What operating conditions?
Increase impact by -196. . .
Referencing the AsM standard and taking into account the conditions of steel in China, the impact energy at liquid nitrogen temperature is 37 joules, and the lateral expansion amount is 0.53 mm.
Which teacher has a welding group? I’m a beginner and would like some advice