Engineering Materials
Inconel contains

68% nickel, 29% copper and 3% other constituents
65% nickel, 15% chromium and 20% iron
80% nickel and 20% chromium
80% nickel, 14% chromium and 6% iron

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Engineering Materials
In process annealing, the hypo eutectoid steel is

Heated from 30°C to 50°C above the upper critical temperature and then cooled slowly in the furnace
Heated from 30°C to 50°C above the upper critical temperature and then cooled suddenly in a suitable cooling medium
Heated below or closes to the lower critical temperature and then cooled slowly
Heated from 30°C to 50°C above the upper critical temperature and then cooled in still air

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