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Properties of steels Kh18N10T and Kh21N5AG7 under load at −196°C

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Conclusions

  1. 1.

    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).

  2. 2.

    At −196° we observed no plastic deformation of steel Kh21N5AG7 with time.

  3. 3.

    Steel Kh18N10T can be replaced with steel Kh21N5AG7 in structures operating at negative temperatures.

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Literature cited

  1. 1.

    G. M. Stepanov, Metal. i Term. Obrabotka Metal., No. 10 (1968).

  2. 2.

    D. McLean, Mechanical Properties of Metals [Russian translation], Metallurgiya, Moscow (1965).

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Additional information

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

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Keywords

  • Plastic Deformation
  • Stress Relaxation
  • Negative Temperature
  • Steel Kh18N10T
  • Design Stress