Description
Why 440C Outperforms
| Property |
440C Sheet |
440A |
D2 Tool Steel |
| Hardness (HRC) |
58–62 (Quenched & Tempered) |
54–56 |
60–62 |
| Corrosion Resistance |
Salt spray: 96+ hours (ASTM B117) |
72 hours |
24 hours (prone to rust) |
| Cost per Ton |
$9.800 |
$7.200 |
$6.500 |
Key Specifications
Composition: 17% Cr / 1.1% C / 0.75% Mo (AMS 5630 compliant)
Impact Toughness: 20 J/cm² at 20°C (ideal for high-stress cutting edges)
Surface Options: Annealed, hardened (+HRC), or mirror-polished (Ra ≤0.05 µm)
Industry-Specific Supremacy
1. Medical & Surgical
Scalpel blades | Orthopedic bone saws | Dental drill bits
2. Aerospace & Defense
Missile guidance bearings | Turbine shaft sleeves | UAV actuator gears
3. Precision Engineering
Swiss CNC cutting tools | Watch escapement components | Optical lens mounts
4. Food Processing
High-speed slicer blades | Meat deboning knives | Sanitary conveyor blades
Fabrication Expertise
Heat Treatment Protocol:
Annealing: 840–900°C slow cool (HB 255 max) for machinability
Hardening: 1.010–1.065°C oil quench + -73°C cryo treatment + double temper at 150–370°C
Machining Tips:
Use ceramic-coated carbide tools | Maintain feed rates >0.1 mm/rev to avoid work hardening
Surface Enhancement:
TiN or DLC coating for 3.500+ HV hardness | Electropolishing for FDA-compliant hygiene
Global Endorsements of Excellence
Rolex Supplier: “440C sheets in our chronograph gears showed 0.001 mm wear after 10M cycles.”
NASA JPL: “Mars rover drill bits made from 440C survived -120°C to 150°C thermal shocks.”
German Surgical Co.: “440C scalpel sheets retained sharpness through 500+ autoclave cycles.”
