Robert Forester Mushet, a British metallurgist, invented steel in 1868. Mushet improved the Bessemer steel-making process by adding manganese. Mushet later noticed that one of his steel bars had hardened despite not being quenched. It was named “air-hardening” steel because it could be fully set in the air rather than water or oil.

Self-hardening is possible due to hardenability. Hardenability is the ability of steel to be cooled slowly. So it can achieve a hard martensitic microstructure rather than a soft ferrite-cementite microstructure. While tool steel’s hardenability was attributed to its high tungsten and manganese content, it was the manganese that allowed it to harden in the air.

Applications of Tool Steel Bar Stock

The Tool steel round bar and h13 round bar is a type of steel that is used in the manufacturing of tools. It is made by rolling and forming a bar, which has an approximate diameter of 1-1/4” – 1-3/8”, from a rod or wire. Tool steel round stock is a type of tool steel that has been cut into smaller pieces with dimensions between 0.25″ and 0.5″. It can be machined and formed into various shapes such as bars, rods, rounds, squares, hexagons, and more.

Tool steel bar stock is a type of steel that is used in the manufacturing of tools. It has a high carbon content, which makes it easy to work with and maintain its strength.

Applications of tool steel bar stock include:

• Machine tools;
• Rolling mills;
• Precision machinery;
• Metalworking machinery;
• Die casting machines;
• Machinery for metal forging.