70 KD

Oil tempered SiCr-alloyed clutch and transmission spring wire

70 KD is especially intended for the manufacture of clutch and transmission springs and similar moderately high fatigue stressed springs. 70 KD S is a shaved version of 70 KD intended for applications with higher surface requirements. The material has good relaxation properties. The wire is manufactured in sizes from Ø 0.50 to 7.00 mm. Sizes from Ø 7.00 to 15.00 mm is manufactured in unshaved version. Other wire sizes and shapes on request.

High tensile
High fatigue
High sag resistance

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Medium fatigue

for applications with medium cyclic fatigue requirements

Alloyed Steel

Good balance between strength and ductility suitable for various applications

Coilability

Consistent surface conditions for high performance in forming process

Product information

Technical specification

Mechanical properties

Chemical composition

Surface conditions

Recommendations

Documents

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

Steel grades and product standards

Nearest equivalent product standards ASTM A1000 A BS 2803 685A55ND
Nearest equivalent steel grades EN TDSiCr SIS 142090-05
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