Toolox 44 round bars

Pre-hardened, precise, predictable steel, now in round bars

Toolox 44 round bars are pre-hardened, ready-to-use quenched and tempered tool steels that come in a wide range of diameters from small to large.

Suitable for engineering applications in tool holders and in different types of shafts and rolls, the diameter dimensions also provide a better solution for round parts in tooling applications like molding and in dies for aluminium die casting.

Ready to use – Toolox is delivered pre-hardened which enables machining in one setup

Guaranteed properties - each Toolox plate undergoes the most rigorous testing in the industry and is delivered with 3.1 certificate
Superior crack resistance - Toolox is 2 to 3 times tougher than comparable steels of similar hardness

Heat Resistant - Toolox is tempered at 590°C giving it high wear resistance at elevated

Suitable for surface engineering - high hardness and toughness of Toolox make it an ideal substrate for surface treatments such as nitriding

Resistant against vibration - Toolox is a steel concept for production of low vibration cutting tools

Toolox 44 round bars

Typical values for Toolox 44



Toolox 44 as heat resistant wear plate with the hardness 450 HB. At 500 °C, it retains about 80% of its original hardness and it is an alternative wear solution to Hardox that is developed specifically for applications subjected to high temperatures. Its unique properties make Toolox a perfect wear plate for metallurgical industries, cement industries, power plants and other areas where the application is exposed to both wear and heat.

Toolox 44 has vibration dampening properties. A research study carried out at KTH, Royal Institute of Technology, shows that cutting tools made from Toolox is more resistant against vibrations. Cutting tools in Toolox 44 allows deeper cuts with the same level of vibrations in the cutting operation and longer insert lifetime compared to traditional tool steels in the same cut level. This makes it possible to achieve higher material removal rate or better surface finish in the machined piece.

Mechanical Properties
21 - 172 410 - 475

Bar Hardness is measured on a milled surface, with indents positioned as impact test according to EN 10 083.


Impact Properties

Test temperature Min. Impact Energy for Charpy-V, longitudinal direction
21 - 141 18 j / 20°C
142 - 172 11 J / 20°C

Impact testing according to EN 10 025, EN ISO 148.

Ultrasonic testing
Ultrasonic inspection is carried out according to EN 10 308 with extra demands according to specification SSAB V6.


Tolerances for Toolox 44 round bars are according to EN 10 060.

For more information concerning dimensions and tolerances, see Toolox round bars dimensional program: Toolox engineering & tool steel dimensional program bars available at or

Delivery Conditions

Order & delivery

Quenched and Tempered at a minimum temperature of 590 °C.

On delivery from SSAB the plates meet the following specifications:

  • free from mill scale
  • not repair welded

Delivery requirements can be found in SSAB’s brochure 41-General product information Strenx, Hardox, Armox and Toolox-UK or

Tech Support

Documents to download