The best tool steel for cold machining
Tool steel O2 is a type of steel that is intended for cold machining. It is characterized by high hardenability and sharpness of the cutting edge. This steel grade does not deform during heat treatment, it is distinguished by a high hardness of the knife, and also has a high regularity of dimensional changes. Tool steel O2 is also known under the more professional name of 1.2842, AISI O2, 90MnCrV8, 90MV8. It does not tolerate excessive heating, which is associated with low resistance to tempering.
The mechanical properties of 90MnCrV8, 1.2842 are:
- Hardness after hardening:> 61 HR
- Hardness in softening annealed condition: <229HB
- Linear expansion coefficient: 11,7 * 10-6 K -1
- Thermal conductivity: 25 W * m * K
- Hardness after hardening and tempering at:
- 200°C => 61.0 HRC
- 250°C = 60.4 HRC
- 300°C = 58.3 HRC
- 350°C = 56.0 HRC
- 400°C = 53.0 HRC
- 500°C = 47.0 HRC
- 550°C = 44.0 HRC
Where is tool steel O2 most commonly used?
The demand for the highest quality steel is especially high in industry. Tool steel is most often used in the production of extremely precise tools, including measuring plates, wood cutters, cutting discs and circular knives, paper, leather and tobacco cutting blades, hand reamers, drafts, and micrometer screws. These are just some of the examples of tool steel applications. This type of steel is in demand today because it enables the production of precision tools. Accuracy in construction and engineering is always a priority. The demand for tool steel is increasing every year due to its unrivaled properties.