Filter datasheet


Material data sheet

Steel grade

Last revised: Thu, 23 Feb 2023 16:19:47 GMT

General Information

22NiCrMo12-5* is a group of carburizing steel with high hardenability. High strength combined with excellent toughness and high fatigue strength makes them well suited for applications in the mining industry. Tight alloying windows provides the grades with excellent hardenability and strength control. Can be delivered as rolled, annealed or austenitized and air hardened.

253A - Standard variant with high hardenability and controlled sulphur content for improved machinability.

253R - Variant with reduced sulphur content to meet the clean steel BQ (Bearing Quality) requirement for improved fatigue properties. 

253L - Variant with increased carbon range for increased core hardness after carburizing. Controlled sulphur content for improved machinability.

253S - Variant with slightly increased carbon range for increased core hardness after carburizing. Controlled sulphur content for improved machinability.

4722 - Continous cast variant with slightly increased carbon range for increased hardness after carburizing.

BQ-steel® is a bearing quality clean steel optimized for fatigue strength and is also ideal for new design solutions outside the bearing industry.


For additional Heat Treatment Data, please visit the Heat Treatment Guide.


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

Similar designations

9317, 14NiCrMo13-4, 23NiCrMo12-5, 25NiCrMo12-5, 19NiCrMo11-5, EN27

Jominy hardenability of Ovako 253.   Average value with +/-standard deviation.

Steel cleanliness

    Macro inclusions
Applied standard ASTM E45 Applied standard

ISO 3763

(Blue fracture)

Sampling ASTM A295 Sampling Statistical testing on billets

Maximum average


A BMicro inclusions C D Limits < 5 mm/dm2
Th He Th He Th He Th He
2,5 1,5 1,0 0,5 0 0 0,5 0,5


Tempering response - 253

Case carburizing response - 253

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.