The maximum hardness of manganese steel is 550bhn, which is equivalent to 52HRC. Iron is generally 5--10HRC. Therefore, the hardness of manganese steel knives is much stronger than that of iron knives and ordinary steel knives.
Manganese steel is a wear-resistant steel specially designed for heavy industry. Its application areas include quarrying, mining, excavation, coal industry, foundry and steel industry. After being treated with anti-wear technology, the surface of the material can reach a Brinell hardness of 500--550, continuing to maintain internal flexibility and minimizing surface friction. It can be welded with high manganese steel or similar materials, can be cut by an acetylene oxygen torch, and is non-magnetic. wait.
Steel with a manganese content of 11% to 18% is called high manganese steel. The chemical composition of commonly used cast high manganese steel ZMn13 is: Mn content is 11% to 14%, C content is 1% to 1.4%, Si content is 0.3% to 1%, P content is less than 0.03%, and S content is less than 0.05% . Extended information
Characteristics of high manganese steel: Under strong impact and extrusion conditions, the surface layer rapidly undergoes work hardening, allowing the core to maintain the good toughness and plasticity of austenite while hardening the layer. Has good wear resistance. This is unmatched by other materials. However, the wear resistance of high manganese steel only shows its superiority under conditions sufficient to form work hardening. In other cases, it is very poor.
The typical Mn17 wear-resistant high manganese steel increases the amount of manganese on the basis of Mn13 steel, which improves the stability of austenite and prevents the precipitation of carbides, thereby improving the strength and plasticity of the steel. , improve the work hardening ability and wear resistance of steel. For example, the service life of ZGMn18 railway forks used in the north is 20% to 25% longer than that of ZGMn13.
Reference: Baidu Encyclopedia-Manganese Steel