440B/1.4112
It is one of the stainless steel grades with the highest degree of hardness due to its high carbon content. In addition to high hardness, its toughness and corrosion resistance are also very high. It can reach 50 HRc hardness values with heat treatment. It increases the mechanical values and toughness of the molybdenum material it contains. It also provides relative preservation of its mechanical properties at increasing temperatures. Machinability is relatively good, as is the case with general martensitic grades.
1.4112 is popularly known as AISI 440B.
Knives in the plastic processing industry, surgical cutting tools, die tips and active elements, Shaped and flat knives in the food industry, such as frozen products, perforated discs and other accessories, for meat grinders, shaped knives for fish processing.
AISI 440B
JIS – SUS440B
Chemical Composition
| C % | Sİ % | Mn % | Cr % | Mo % | V % |
|---|---|---|---|---|---|
| 0,85-0,95 | max 1,00 | max 1,00 | 17,00-19,00 | 0,90-1,30 | 0,07-0,12 |
Mechanical Properties
| Hardness HB | %0,2 Yield Strength N/mm2 | Tensile Strength N/mm2 | Elongation % |
|---|---|---|---|
| max 265 HB 55-57 HRc (after hardening) 52-55 HRc (hardening+temper) | 1860 (hardening+temper) | 1930 (hardening+temper) | min 3 (hardening+temper) |