Heat resisting steels and its application

Heat resisting steels

Heat resisting steels are
practically suitable for working at even very high temperatures. Such steels
must resist the influences which lead to failure of ordinary steels when put to
work under high
temperatures. Alloy
steel containing 23-30%
chromium with
less than 0.35% C are mainly used to impart heat resisting service in the
temperature range between 815- 1150
°C. The
furnace parts and annealing boxes are generally made by this steel. These
steels are particularly suitable for
working at high temperatures and are thus stable at high
temperatures. A steel containing chromium,
nickel and tungsten, with the carbon
content suitably
controlled provide
useful combination of non-scaling and strength retaining
properties at high temperature. Such steels can work satisfactory up to
700°C and contains 0.15% C,
0.5 to 2 % Si, 0.5% Mn, 1.0 to 6%, Cr and 0.5%. Mo.

Applications of Heat resisting steels

These are used in nuclear power plant, furnaces, supersonic aircrafts, missiles,
annealing boxes etc.

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