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Material data sheet

Steel grade

Last revised: Tue, 02 May 2023 13:15:40 GMT

General Information

Ovako 420G is a through hardening alloy steel with god wear resistance in the as-rolled condition. It is also a good nitriding steel for enhanced wear resistance. Mainly used for drill rods.

• Good toughness

• Good dimensional stability

• Through hardenability corresponding to approximately 130 mm

• Delivered as rolled, soft annealed or QT

Similar designations

BS 722 M 24

CCT - steel grade Ovako 420G

Tempering response - Ovako 420G

Steel cleanliness

Micro inclusions - steelgrade 420G   Macro inclusions - 420G
Applied standard ASTM E45 Applied standard

ISO 3763

(Blue fracture)

Sampling ASTM A295 Sampling Statistical testing on billets

Maximum average


A B 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

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.