Spring out of patented drawn wire
Treatment : patented - drawn
Magnification : 200 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : longitudinal
Testing result :
sorbite and lamellar pearlite
stretched crystalline structure
Treatment : patented - drawn
Magnification : 500 : 1
Etching medium : 3 % alcoholic nitric acid
Sampling / Specification : longitudinal
Testing result :
ca. 75 - 80 % sorbite and 20 - 25 % lamellar pearlite
stretched crystalline structure