Toolox® prehardened steel stands up to wear and tear
Making a hard steel is easy, if you’re only looking for hardness. The tricky part is to make a steel that is both hard and tough. A steel such as Toolox®. With hardness that gives a long lifetime even with highly abrasive applications, and toughness that enables it to withstand cracks and fatigue.
Hardness and toughness
Toolox® steel is hard to the core
All Toolox® steel grades have the same hardness all the way through. You can machine Toolox® plates and round bars to any complex shape, knowing that all surfaces are equally hard.
Toolox® steel has a fine grained tempered martensitic crystalline structure, a result of quenching at a high cooling rate. The fine grain size gives high toughness.
Impact toughness, Charpy-V (J) at 20°C
The table shows the toughness of Toolox® 44 compared to some standard steels that are heat treated to 45-55 HRC. Toughness values for Toolox® at -20°C are stated in the productcertificates.
| Grade | Hardness (HB) | Yield strength (MPa) | Tensile strength (MPa) | Elongation A5 (%) | Toughness at +20°C (J) |
|---|---|---|---|---|---|
| Toolox® 33 | 275-325 | 850 | 980 | 14 | 100 |
| Toolox® 44 | 410-475 | 1300 | 1450 | 13 | 30 |
Toolox® 33 has a nominal hardness of 300 HBW. Toolox® 44 has a nominal hardness of 45 HRC, making it the world’s hardest fully prehardened tool steel. Datasheets for all Toolox® grades are available here.
"We switched from 1.2379 steel with 56 HRC to Toolox® 44. Instead of cracking after 5,000 pieces the work piece in Toolox® 44 shows no wear after more than 40,000 pieces."
Read all about why Toolox® steel outperforms on every challenge
Get the full story of Toolox® engineering and tool steel from SSAB.
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Read all about welding and cutting recommendations for Toolox® steel
Toolox® is easy to weld and easy to cut. In the brochure you’ll find the best practises.
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Read all about machining of Toolox® steel
Toolox® is a prehardened steel with high machinability for making finished parts without time-consuming and costly heat treatment
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