440C Stainless Sheet

Products Description

440C stainless steel sheets are the ultimate fusion of edge retention and rust defiance. With 1.1% carbon and 17% chromium, this martensitic powerhouse achieves 60+ HRC post-hardening-surpassing tool steels like D2 in wear resistance while retaining stainless-grade corrosion immunity. Engineered for applications where friction, abrasion, and hostile environments collide, 440C sheets are the backbone of surgical scalpels, jet engine bearings, and luxury watch components.

Why 440C Outperforms

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."

Application