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Material data sheet

Steel grade

Last revised: Wed, 18 Jan 2023 10:52:33 GMT

General Information

Ovako 498 is a high strength quench and tempering steel with high hardenability, excellent toughness, high wear resistance and good dimension stability.

498A - Standard variant.
498Q - IQ isotropic quality


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

Similar designations

30 NCD 15, En30B

Jominy hardenability of Ovako 498A.   Average value with +/-standard deviation.

Steel cleanliness


Micro inclusions - 498A   Macro inclusions - 498A
Applied standard ASTM  45   Applied standard

ISO 3763

(Blue fracture)

Sampling ASTM  A295   Sampling Statistical testing on billets
Maximum average limits A B C D   Limits <5 mm/dm2
Th He Th He Th He Th He  
2,0 1,5 1,0 0,5 0 0 0,5 0,5  
Micro inclusions - 498Q   Macro inclusions - 498Q
Applied standard DIN 50602  K1   Applied standard

10 M Hz UST

(Ovako internal standard)

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

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

should not exceed the limits given in the graph


< 10 defects/dm3

> 0,2 mm FBH


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

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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.