Assertion: annealing's temperature | /r/HasProperty | maintained for definite time
Facets:
Source sentences:
text: In this, the hypo-eutectoid steel is heated to a temperature approximately 20° to 30°C above the higher critical temperature and for hypereutectoid steel and tool steel is heated to a temperature 20 to 30°C above the lower critical temperature and this temperature is maintained for a definite time and then slowly cooed very slow1y in the furnace itself.