materials

Variable depending on the thermal treatment type! Hardness values depending on ring cross section measured in Rockwell HTRA or HRC.
The surface colour can vary depending on the thermal treatment type: bright, light brown or blackened.
For FK8 series, depending on the requirements, the listed laminar ring materials are available, please include the laminar ring material in your order.

Steel Type	Spring Resistant up to	Hardness	Surface Treatment	Surface Protection	Surface Colour	Available for Series
C75S-DIN 1.0605	Max +300^oC	On request ⁽¹⁾	-	Oiled	Variable ⁽²⁾	FK2, FK3, FK4, FK6, FK7, FK8 ⁽³⁾
C60E-DIN 1.1221	Max +300^oC	On request ⁽¹⁾	-	Oiled	Variable ⁽²⁾	FK2, FK3, FK4, FK6, FK7
50CrV4-DIN 1.8159	Max +400^oC	On request ⁽¹⁾	-	Oiled	Variable ⁽²⁾	FK2, FK3, FK4, FK6, FK7
CrNi-DIN 1.4310	Max +450^oC	On request ⁽¹⁾	-	Bright & Dry	Variable ⁽²⁾	FK3, FK6, FK7, FK8 ⁽³⁾
CrNi-DIN 1.4571	Max +500^oC	On request ⁽¹⁾	Vibratory grinding	Dry	Variable ⁽²⁾	FK5, FK5-HFL, FK8 ⁽³⁾
CrNi-DIN 1.4980	Max +700^oC	On request ⁽¹⁾	Vibratory grinding	Dry	Variable ⁽²⁾	FK5-HFL

General Information