OTEVA 91 SC Plus

Oil tempered SiCrVMo-alloyed ultra-high tensile valve spring wire for surface nitriding.

OTEVA® 91 SC PLUS is intended for manufacture of valve springs and other springs requiring extremely high fatigue properties and good relaxation properties at increased working temperatures. Manufactured as standard in shaved condition in sizes from Ø 2.00 mm to 10.0 mm, or in egg or elliptical shape corresponding to round cross section 2.50 mm to 6.00 mm. Other wire sizes on request.

Very high fatigue
High tensile
High sag resistance

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Product request

Very high fatigue with excellent surface condition

 for applications with very high cyclic fatigue requirements

Alloyed Steel

Surface nitridable steel suitable for various applications with high requirements in fatigue, wear resistance and relaxation in moderate temperatures.


Consistent surface conditions for high performance in forming process

Product information

Technical specification

Mechanical properties

Chemical composition

Surface conditions


Property Value
E modulus of elasticity 206 kN/mm2
G modulus of shear 79.5

Steel grades and product standards

Nearest equivalent product standards ASTM A877 D

Applications using OTEVA 91 SC Plus