Metals — billet size convention The statement 'The minimum size of a billet is 10 cm × 10 cm' is __________ with respect to standard metallurgical classifications of blooms, billets, and slabs.

Difficulty: Medium

Correct Answer: Disagree

Explanation:


Introduction / Context:
In primary metal processing, semi-finished products are categorized as slabs, blooms, and billets by section geometry and size ranges. Confusing these definitions can lead to errors in specifying downstream rolling or forging equipment.


Given Data / Assumptions:

  • Billets are generally smaller square or round sections compared to blooms.
  • Size conventions vary by mill and standard but typically fall within broad ranges.
  • The statement claims a fixed 'minimum' of 10 cm × 10 cm (100 mm square).


Concept / Approach:
Typical practice places billets below bloom sizes. Many mills produce billets near 36–125 mm square, and some routes produce continuous-cast billets smaller than 100 mm. Thus, claiming a universal minimum of 100 mm is inaccurate across industries and materials.


Step-by-Step Solution:
Recall category ranges: billets are the smaller semifinished forms.Recognize that minimum size is not universally fixed at 100 mm.Therefore, the absolute statement is incorrect.


Verification / Alternative check:
Mill catalogs and standards list billets with various square sizes such as 50, 75, or 90 mm, demonstrating that 100 mm is not a strict global minimum.


Why Other Options Are Wrong:
Any option that agrees universally with a rigid minimum overlooks industrial variability; material-specific agreements (aluminum or stainless) are not standard global rules.


Common Pitfalls:
Assuming one plant's practice equals an international definition; neglecting that shapes may be round, square, or rectangular with differing cutoffs.


Final Answer:
Disagree

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