Ac-3 Sentence Examples

Thus, prior exposure to a temperature materially above Ac 3 coarsens the structure of most steel, in the sense of giving it, when cold a coarse fracture, and enlarging the grains of pearlite, &c., later found in the slowly cooled metal.

This injury fortunately can be cured either by reheating the steel to Ac 3 when it " refines," i.e.

Hence steel which has been heated very highly, whether for welding, or for greatly softening it so that it can be rolled to the desired shape with but little expenditure of power, ought later to be refined, either by reheating it from below Are to slightly above Ac 3 or by rolling it after it has cooled to a relatively low temperature, i.e.