51. The machinability of steel is increased by
52. The hardness is the property of a material due to which it
53. White cast iron has
54. When a steel containing __________ 0.8% carbon is cooled slowly below the lower critical point, it consists of ferrite and pearlite.
55. The ratio of the volume occupied by the atoms to the total volume of the unit cell is called
56. Smelting is the process of
57. Induction hardening is the process of
58. Cyaniding is the process of
59. Stress relaxation is the phenomenon
60. In nodular iron, graphite is in the form of
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