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May 12, 2022
Generally, the upper limit temperature that can be safely used as a mechanical part is about 450℃~600℃.
The strength decreases with the increase of temperature, and it is about 1/3 of the normal temperature at 750℃. Not that it can't be used even at higher temperatures, but creep is also an issue. For example, SUS304 was used as a jig for brazing in a furnace at 1050°C, but it gradually deformed and became unusable.
Also, if heated at a temperature of 600°C to 800°C for about 10 minutes or more, it will become sensitive (*) and corrosion resistance will be reduced, so do not use it if there is a problem with corrosion resistance within this temperature range.
Plasticly worked materials (forging, high rate draw, sheet, etc.) can be sensitized in about 1 hour even at 450°C.
As for low temperature, it can be used even at liquid nitrogen temperature: -196℃, without worrying about low temperature embrittlement.
*: Due to the precipitation of chromium carbide, the phenomenon of insufficient chromium (less than 13%) in the base metal is likely to cause intergranular corrosion and intergranular stress corrosion cracking.
The above is the Heat Resistance Of 304 Stainless Steel we have listed for you. You can submit the following form to obtain more industry information we provide for you.
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