Computer · Iron-Carbon Phase Diagram
The upper critical temperature (A3 or Acm) for steel:
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Is independent of alloy composition
- 2Varies with the carbon content of the steel✓
- 3Depends only on the cooling rate
- 4Is a constant value of 727°C
Correct answer
Varies with the carbon content of the steel
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