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Material data sheet

Steel grade

Last revised: Fri, 17 Jun 2022 15:02:12 GMT

General Information

General information

Ovako 123A is a Mn, Cr and Mo alloyed carburizing steel. The grade is comparable with 20MnCrMo4-2 but with slightly increased sulphur range for improved machinability. It is produced with tighter compositional ranges compare to the ISO standard in order to ensure a reproducible heat treatment behaviour.

Carburizing response - Ovako 123A

Steel cleanliness

Micro inclusions - steel grade 123A   Macro inclusions - 123A
Applied standard ASTM E45 Applied standard

ISO 3763

(Blue fracture)

Sampling ASTM A295 Sampling Statistical testing on billets.


average limits

A B C D Limits < 2,5 mm/dm2
Th He Th He Th He Th He
2.5 1.5 2.0 1.0 0.5 0.5 1.0 1.0

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.