267. Pig iron is the name given to
268. Shock resistance of steel is increased by adding
269. An engineer's hammer is made of
270. Alnico, an alloy used extensively for permanent magnets contains iron, nickel, aluminium and cobalt in the following ratio
271. In the lower part of the blast furnace (zone of fusion), the temperature is
272. Recrystallization temperature can be lowered by
273. Pure iron is the structure of
