Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 4 (Q.No. 39)
39.
Sulphur in cast iron
Discussion:
8 comments Page 1 of 1.
Sushil said:
4 years ago
Thanks for explaining @Rc.
Harakeri said:
6 years ago
Thank you @Rc.
RC said:
6 years ago
In Cast iron:
Silicon : soft and easily machinable.
Sulphur : hard and brittle.
Manganese : white and hard.
Phosphorus : aids fusibility and fluidity.
In Steel:
Silicon : tougher and harder.
Sulphur : produce red shortness.
Manganese : makes ductile and good bending qualities.
Phosphorus : produce cold shortness and increase yield point.
Silicon : soft and easily machinable.
Sulphur : hard and brittle.
Manganese : white and hard.
Phosphorus : aids fusibility and fluidity.
In Steel:
Silicon : tougher and harder.
Sulphur : produce red shortness.
Manganese : makes ductile and good bending qualities.
Phosphorus : produce cold shortness and increase yield point.
(3)
Sangram said:
7 years ago
Yes, 'A' is the correct Answer.
(1)
Sanjay said:
8 years ago
Sulphur may aid to improve machinability of low Carbon steel where free machining is required otherwise it increases brittleness (hot shortness) of cast iron or steel due to segregation of FeS at grain boundaries.
ANAND KUMAR said:
8 years ago
Silicon will make the cast iron soft and easily machinable. Sulphur will make d cast iron hard and brittle. Phosphorous will increase fluidity and fusibility.
Rakesh said:
8 years ago
The sulphur increases machinability.
Neeraj said:
9 years ago
According to me, A is right answer.
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