What is cryogenic temperature? - Material Science

Q.  Which of the following statements is/are false?
- Published on 06 Aug 15

a. Temperature lower than 157 oC is cryogenic temperature
b. Impact test measures notch toughness
c. Nickel base steels are used for low temperature applications
d. All the above statements are false

ANSWER: Temperature lower than 157 oC is cryogenic temperature

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    Discussion

  • Sravanthi   -Posted on 07 Oct 15
    Temperature lower than -157° C is called as cryogenic temperature. Different types of metals used for low temperature applications are plain carbon steel, austenitic stainless steel, aluminum lithium steel and nickel base steels.

    The property of metals to resist fractures in presence of metallurgical notch is called as notch toughness. Impact test is used to measure this notch toughness.

    Ductility and toughness of metals reduces at low temperatures. Low temperature improves fatigue resistance of metals.

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