API 571 Certification (Corrosion & Materials) Practice Test

Disable ads (and more) with a membership for a one time $2.99 payment

Enhance your knowledge of API 571 Corrosion and Materials Certification. Tackle flashcards and multiple choice questions, each offering hints and explanations. Get ready to excel in your exam!

Start Multiple Choice Practice Test
Start Flash Cards

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which of the following materials is NOT susceptible to HTHA?

  1. 5Cr-0.5Mo

  2. 300 series SS

  3. 1Cr-0.5Mo

  4. Mn-0.5Mo

The correct answer is: 300 series SS

The 300 series stainless steels are generally known for their excellent resistance to hydrogen-induced damage, including hydrogen attack, hydrogen embrittlement, and high-temperature hydrogen attack (HTHA). These materials typically contain significant nickel content, improving their properties in corrosive environments. The austenitic structure of 300 series stainless steels also contributes to their resistance to HTHA, making them a favorable choice in applications where hydrogen exposure occurs. In contrast, the other materials listed, such as the various chromium-molybdenum steels (5Cr-0.5Mo, 1Cr-0.5Mo, and Mn-0.5Mo), can be more susceptible to HTHA due to their composition and microstructure. These materials are often used in high-temperature applications, but their susceptibility to HTHA underscores the need for careful evaluation in environments where they may be exposed to hydrogen at elevated temperatures.

More Questions Like This