Under the standardization AISI 440, we understand the following steel grades in the German material system:
Stainless steels can be produced in different ways. Due to the manufacturing process, steel creates a different microstructure and therefore different properties.
In general, steels can be subdivided into the following categories:
- Precipitation hardening
AISI 400 Series -> Ferritic and Martensitic Chromium Alloys
The main subdivisions are divided into further subgroups. The AISI 400 series is subdivided into AISI 405, AISI 408, AISI 409, AISI 410, AISI 430 and AISI 440.
The materials AISI 440 can be described as Martensitic stainless steels. They vary by the alloy composition, especially the percentage of carbon. The other alloying elements are similar.
The steel grade 1.4112 is also known as AISI 440 B. Due to the high carbon content this stainless steel has a high hardenability and is corrosion resistant.
The material AISI 440 C form part of the martensitic stainless steels. In its chemical name X105CrMo17, the high carbon content becomes apparent. As a result, the grade 1.4125 has a higher hardness.
Due to their properties, the two steel grades listed above are often used in the knife industry.
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