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Combined carbon content in iron and steel is determined by treating the sample with dilute HNO 3 . So that combined carbon forms a soluble brown nitrated compound, the intensity of which is matched with that of a standard sample of similar composition treated under similar condition. The intensity of color produced is proportional to the carbon content of iron of steel sample. This method of combined carbon determination is called the
Von Mises criterion for plastic yielding of a ductile metal predicts that the yield stress in uniaxial tension is related to that in pure torsion as
The maximum possible reduction in a single pass for cold rolling of a 200 mm slab is (given the co-efficient of friction 0.1 and roll diameter is 400 mm) . . . . . . . . mm.
In general, strongest polymer group is
Decomposition of calcium carbonate occurs as: CaCO 3 = CaO + CO 2 : ΔG 0 T = 17710 - 158T J. mol -1 What will be the decomposition temperature (in K) of CaCO 3 , if the activity of CaO is 0.5 and the pressure is 3 atmospheres?