440B Stainless Steel
1.4112
- EN1.4112
- ENX90CrMoV18
- AISI440B
Martensitic stainless steel with high hardenability and wear resistance. Provides good resistance to oxidation and corrosion and is suitable for elevated-temperature service. Its good machinability makes it suitable for CNC machining, milling and other mechanical processing. Magnetic.
01Applications
- Knives and cutting tools that must be stainless
- Screws and heads in plastics processing machinery
- Injection mold nozzles
- Knives and machine parts in the food industry, cutting applications
- Razor blades, surgical instruments, dental instruments and other cutting tools
02Delivery Condition
- 54–60 HRC
03Heat Treatment
Typical values
- Soft annealing
- 800–850 °C; max. 285 HB
- Preheating
- 760–800 °C
- Hardening
- 1000–1050 °C; oil/air/pressurised gas
- As-quenched hardness
- ≈ 56–58 HRC
- Tempering
- 100–200 °C → 55–57 HRC; avoid 400–550 °C
- Working hardness
- 54–58 HRC
- Sub-zero
- Optional −70 °C
Heat treatment cycle (schematic)
Tempering diagram (approximate)
Values are approximate and for information only; they vary with section size, heat and furnace conditions. Binding values are determined from the manufacturer’s data under laboratory conditions.
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