n1	Represents a high resistance of the surface layer.
n (angle)	The level of the beginning of the effect of the channel break (represents the influence of the ECAP technology knee).
nRe	Level of exceeding the yield strength Re of the material.
n (rmed)	Level of mean number of extrusions n(lim)/2.
ncrit = n (rm)	Level of exceeding the yield strength Rm of the material (delimited zone of structural deformations).
n (lim)	Level of reaching the limit deformation capacity (zone of decomposition of structural bonds).