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AISI SS 440 B
Due to the higher carbon content, AISI 440 B is a chromium steel with high hardness, wear resistance and good cutting ability. It is magnetic, stainless, contains molybdenum and vanadium. Its wear resistance and corrosion resistance make it particularly suitable for wear parts. Due to its mechanical properties, AISI 440 B is also known as knife steel.
SS 440 B is used for shaped and flat knives in the food industry, perforated discs and accessories for mincers and shaped knives for fish processing. It is also well suited for surgical cutting tools and active elements in plastics processing, as well as in the automotive sector.
International identifiers
SAE 440B, AFNOR X89CrMoV18-1, SUS440B, UNS S44003, 1.4112
Chemical composition
| AISI 440 B (1.4112) |
C | Si | Mn | P | S | Cr | Mo | Ni | V |
| min. | 0.85 | bis | bis | 17.00 | 0.90 | 0.07 | |||
| max. | 0.95 | 1.00 | 1.00 | 19.00 | 1.30 | 0.12 |
Forging
The forging process can be carried out between 1100°C and 800°C. Slow cooling is then carried out in the furnace, in ash or in the air.
Welding
This material is unsuitable for welding. There is a risk of hardening cracks.
Corrosion resistance
AISI SS 440 B in the quenched and tempered condition is corrosion resistant to water and chemical products due to its high chromium content.
Heat treatment
Heat treatment results in high hardness and good corrosion resistance.
Produced to the highest Standard
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