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Exam API-571 topic 1 question 142 discussion

Actual exam question from API's API-571
Question #: 142
Topic #: 1
[All API-571 Questions]

Temper embrittlement can be identified by a(n) shift in the ductile-to-brittle transition temperature measured in a Charpy impact test.

  • A. Upward
  • B. Downward
  • C. Abrupt
  • D. None of the above
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Suggested Answer: A 🗳️
by ahmadmm at Oct. 11, 2023, 4:28 a.m.

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ahmadmm
1 year, 1 month ago
Temper embrittlement is the reduction in fracture toughness due to a metallurgical change that can occur in some low-alloy steels as a result of long-term exposure in the temperature range of about 650 °F to 1070 °F (345 °C to 575 °C). This change causes an upward shift in the ductile-to-brittle transition temperature as measured by Charpy impact testing.
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