Effect of Heat on Hole Diameter in Steel - Short Question for Homework (2 Marks)

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When steel is heated, the diameter of a drilled hole typically increases due to thermal expansion. As the steel expands, both the outer and inner circumferences of the hole expand outward, resulting in a larger diameter. The discussion highlights the misconception that the diameter might decrease, clarifying that a solid piece of steel will expand uniformly. An analogy is made using a paper square with a hole, demonstrating that enlarging the entire piece increases the hole size as well. Overall, the consensus is that heating steel causes the diameter of the hole to increase.
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Homework Statement


this is a 2 marks question
a hole is drilled through a piece of steel what happens to the diameter of the hole as the steel is heated


Homework Equations





The Attempt at a Solution



i guess the diameter of the hole decreases as both the outer as well as inner circumference are free the outer circumference expands outside and inner circumference towards in resulting the hole to be small.....
 
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What do you mean outer circumference? is it a sheet with a hole in it or a ring?
 
Take a piece on paper and make a 2" x 2" square. In the center, draw a 0.5" diameter hole. Go to a photocopy machine and enlarge it by 30% or 40% or whatever is handy. Then measure the sides of the new square and the diameter of the hole. What happened?
 
hi neu
it is a solid steel
 

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