MATERIALS 43 



Molybdenum Steel. 



1. Effect of molybdenum on steel is between that of tungsten and chromium. 



2. Molybdenum in chrome steel improves the forging qualities. 



High-speed Steels. 



1 . Derive their properties from selected combinations of the several metals listed 

 above. 



2. Cobalt, uranium, titanium, and silver are also used in high-speed steels. 



3. A typical high-speed steel analysis is iron, 68.79 per cent; carbon, 0.51; 

 manganese, 0.26; silicon, 0.14; phosphorus, 0.02; sulphur, 0.04; chromium, 

 7.08; tungsten, 22.68; and molybdenum, 0.48 per cent. 



