Identify the incorrect statement listed?
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Answer: D. Both B. and C.
Explanation
Standard austenitic 18/8 stainless steel has a face-centered cubic structure and is non-magnetic. The claim that 18/8 stainless steel is a magnetic steel directly contradicts metallurgical facts. Annealed austenitic stainless steels do not attract magnets due to their crystal phase. High alloy steels contain significant percentages of alloying elements exceeding standard limits. Hardening treatments increase steel hardness but inherently increase brittle fracture tendencies. Cold working can induce slight magnetism in austenitic stainless steels through martensite transformation.
Kitchen equipment and medical instruments use non-magnetic austenitic stainless steels routinely. Industrial fabricators must verify alloy magnetism during specialized magnetic testing procedures. Understanding magnetic properties aids in sorting different stainless steel grades in scrap yards. Hardening undeniably makes steel more brittle while simultaneously increasing its hardness. High alloy steels contain substantial total percentages of added alloying elements. Listing multiple incorrect statements as the correct answer option validates this choice.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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