Abstract
Comparative studies are provided for cryogenic austenitic steels. All of the steels studied may be used as cryogenic materials with increased strength. A new economic low-nickel steel Cr19Ni6Mn10Mo2N has the highest strength level in hot-rolled and cold-rolled conditions from the austenitic condition region, and this provides effective use within the Arctic and Antarctic climatic regions. This steel has a stable austenitic structure and quite good mechanical properties from +100 to –170°C and at these temperatures may replace highly alloyed steel type Cr22Ni16Mn7N. Traditional steel Cr19Ni9N may only be used as cryogenic material for undeformable objects since below 70°C strain-induced martensite may form within it.
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