Mechanical Engineering - Engineering Materials - Discussion
Discussion Forum : Engineering Materials - Section 2 (Q.No. 23)
23.
Which of the following material has nearly zero coefficient of expansion?
Discussion:
3 comments Page 1 of 1.
Reddy pavan k said:
6 years ago
Invar is a 36% nickel-iron alloy which has the lowest thermal expansion among all metals and alloys in the range from room temperature up to approximately 230°C. The Invar alloy is ductile and easily weldable, and machinability is similar to austenitic stainless steel. It does not suffer from stress corrosion cracking.
(1)
Abdul said:
10 years ago
Invar is a 36% nickel iron alloy which has the lowest thermal expansion among all metals and alloys in the range from room temperature up to approximately 230°C. The Invar alloy is ductile and easily weldable, and machinability is similar to austenitic stainless steel. It does not suffer from stress corrosion cracking.
The mean coefficient of thermal expansion (CTE) of Invar from 20-100°C is less than 1.3 x 10-6°C-1. The Curie point is 230°C, and density is 8.1 kg. M-3.
The mean coefficient of thermal expansion (CTE) of Invar from 20-100°C is less than 1.3 x 10-6°C-1. The Curie point is 230°C, and density is 8.1 kg. M-3.
Vasu mittal said:
1 decade ago
Invar is a 36% nickel iron alloy which has the lowest thermal expansion among all metals and alloys in the range from room temperature up to approximately 230°C. The Invar alloy is ductile and easily weldable, and machinability is similar to austenitic stainless steel. It does not suffer from stress corrosion cracking.
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