Multiple choice

The cross-section of a thermo-mechanically treated (TMT) reinforcing bar has

  1. soft ferrite-pearlite throughout

  2. hard martensite throughout

  3. a soft ferrite-pearlite core with a hard martensitic rim

  4. a hard martensitic core with a soft pearlite-bainitic rim
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

TMT bars are manufactured through a quenching and tempering process that creates a hard, wear-resistant martensitic outer layer (rim) and a ductile, tough ferrite-pearlite core.

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