Civil Engineering - Building Materials - Discussion

2. 

Red short iron cracks when bent due to the presence of

[A]. sulphur
[B]. carbon
[C]. phosphorus
[D]. silicon.

Answer: Option A

Explanation:

No answer description available for this question.

Anil Paswan said: (Sep 30, 2015)  
What is red iron?

Lippun Sa said: (Nov 3, 2015)  
Please give the answer clearly.

Indhu said: (May 5, 2017)  
This is due to the sulfur forming iron sulfide/iron mixtures in the grain boundaries of the metal which have a lower melting point than the steel.

Krishna said: (Dec 4, 2017)  
RED HOT IRON means?

Mmmm said: (Jan 11, 2018)  
Please clarify it.

Krishna Kumar said: (Jun 12, 2018)  
Red hot iron bend due to sulphur. When the iron is heated above it becomes red hot so the name given. At this temperature, it becomes malleable but due sulphur it becomes brittle & forms cracks due to grain heat concentration.

Sumit Vishwakarma said: (May 27, 2019)  
Red-short, hot-short refers to brittleness of steels at red-hot temperatures. It is often caused by high sulfur levels, in which case it is also known as sulfur embrittlement.

Subhakanta Swain said: (Jun 24, 2019)  
Red hot iron is otherwise know as hot metal (product from blast furnace) impurities in hot metal are:

Silica-imparts non-homoginity.
Carbon-brittleness.
Sulphur-surface cracks.

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