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Variants

Material data sheet

Steel grade

Last revised: Wed, 06 Oct 2021 13:27:25 GMT

General Information

Ovako 158Q is an ingot cast case hardening steel specially designed to minimize the occurrence of internal oxidation. Furtermore it is produced with the highest cleanliness level, isotropic quality (IQ), to ensure a minimum of oxidic and sulphidic inclusions.

Ovako 258Q is an ingot cast case hardening variant, with slightly increased hardenability. This variant is also produced with the highest cleanliness level, isotropic quality (IQ). 

 

IQ-Steel® 
IQ-Steel® is an isotropic quality ultra clean steel optimized for high fatigue strength under multi axial loading.

 * Designation followed by "*" is not an official EN standard grade but named according to the rules in EN 10027.

Similar designations

22NiMo9-9*

Typical Jominy hardness for steelgrade Ovako 158Q.

Steel cleanliness - IQ

Micro inclusions - IQ      Macro inclusions - IQ
Applied standard DIN 50602  K1 Applied standard

10 MHz UST

(Ovako internal standard)

Sampling Six random samples from final product dimension Sampling Statistical testing on billets
Limits

The limit is dimension dependent. The average rating of six samples 

should not exceed the limits given in the graph

Limits

< 10 defects/dm3

> 0,2 mm FBH

 

IQ

Carburizing response - Ovako 158Q

Fatigue properties

Other properties (typical values)

Youngs module (GPa)Poisson´s ratio (-)Shear module (GPa)Density (kg/m3)
210 0.3 80 7800
 Average CTE 20-300°C (µm/m°K) Specific heat capacity 50/100°C (J/kg°K) Thermal conductivity Ambient temperature (W/m°K) Electrical resistivityAmbient temperature (µΩm)
 12  460 - 480  40 - 45  0.20 - 0.25

Contact us

Would you like to know more about our offers? Don´t hesitate to contact us:

Via e-mail: info@ovako.com 

Via telephone: +46 8 622 1300

For more detailed information please visit http://www.ovako.com/en/Contact-Ovako/

  

 

Disclaimer

The information in this document is for illustrative purposes only. The data and examples are only general recommendations and not a warranty or a guarantee. The suitability of a product for a specific application can be confirmed only by Ovako once given the actual conditions.The purchaser of an Ovako product has the responsibility to ascertain and control the applicability of the products before using them. Continuous development may necessitate changes in technical data without notice. This document is only valid for Ovako material. Other material, covering the same international specifications, does not necessarily comply with the properties presented in this document.