At the design stress (15 kg/mm2) used for structures operating at −196° the plastic deformation of steel Kh18N10T increases with time even though extrapolation of the data to 10 years of service gives a small value (ε=0.1%). In addition the steel undergoes intensive stress relaxation (the stress decreases to one-half).
At −196° we observed no plastic deformation of steel Kh21N5AG7 with time.
Steel Kh18N10T can be replaced with steel Kh21N5AG7 in structures operating at negative temperatures.
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G. M. Stepanov, Metal. i Term. Obrabotka Metal., No. 10 (1968).
D. McLean, Mechanical Properties of Metals [Russian translation], Metallurgiya, Moscow (1965).
Translated from Metallovedenie i Termicheskaya Obrabotka Metallov, No. 6, pp. 13–16, June, 1970.
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Stepanov, G.A., Grudzinskii, D.V. & Shlyamneva, I.A. Properties of steels Kh18N10T and Kh21N5AG7 under load at −196°C. Met Sci Heat Treat 12, 461–463 (1970). https://doi.org/10.1007/BF00668851
- Plastic Deformation
- Stress Relaxation
- Negative Temperature
- Steel Kh18N10T
- Design Stress