Herbert hat mir ein paar Infos zum 20C geschickt:
Uddeholm 20C (Federstahl) entspricht dem Ck101 (1.1274).
C= 0,95-1,05
Si = 0,15-0,35
Mn = 0,4-0,6
P und S beide kleiner als 0,035
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UHB 20C - In hardened condition, meets highest conceivable demands on purity and high fatigue strength. The ultimate tensile strength (UTS) is related to the strip thickness to give the best combination of blankability and high fatigue strength. Bendability is surprisingly good even at high UTS-level.
Applications: Flapper valves and shock absorber valves, accordion reeds, feeler gauges, springs, doctor blades, industrial knives.
(Quelle: Uddeholm.com)
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Uddeholm 15N20 (Sorry, ich hatte oben 15C20 geschrieben. Habe ich aber jetzt korrigiert)
C= 0,75
Mn= 0,75
Ni= 2,0
(Quelle: http://www.primosknives.com/articles/steelcmp.htm)
15N20 - Specially developed for wood bandsaw blades. Good toughness and high fatigue strength.
Applications: Wood bandsaw blades, wood and stone gangsaw blades, compressor valves.
(Quelle: Uddeholm.com)