Stainless Steel Grade 440C | UNS# S44004 is a high carbon martensitic stainless steel that demonstrates high strength, moderate corrosion resistance, and good hardness and wear resistance. The highest resistances for type 440C can be achieved by hardening and polishing which make this material ideal for cutting instrumentation, surgical blades, and knife blades. Because of these traits it is also common to find type 440C in ball bearings, valves, and measuring instruments.
Stainless Steel Grade 440C Specifications:
Stainless Steel Type 440C product forms offered at all Titanium Industries’ locations:
Stainless Steel Grade 440C Applications:
- Ball Bearings
- Valves
- Measuring Tools and Instruments
- Surgical Blades
- Knife Blades
- Cutting Tools
DISCLAIMER: Alloy data sheets are for reference only, not for design purposes.
| Chemical Composition | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Fe 79.15% | Cr 17.0% | Mn 1.0% | C 1.10% | Si 1.0% | |||||
| Mo 0.75% | |||||||||
| PHYSICAL PROPERTIES | ||||||
|---|---|---|---|---|---|---|
| Density | Electrical conductivity (% IACS) | Thermal conductivity (BTU-in/hr-ft²-°F) | Specific heat capacity | Thermal expansion (1/°F) | Melting Point (°F) | |
| 0.282 | 2.87 | 168 | 0.11 | 0.00000567 | 2700 | |
| Mechanical Properties | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Property | Minimum | Maximum | |||||||
| Yield Strength Range (Rp0.2 Offset) (ksi) | 60.9 | 276 | |||||||
| Tensile Strength Range (Rm) (ksi) | 110 | 286 | |||||||
| Elongation (AL=5 x Ø) | 2.0% | 15.0% | |||||||
| Brinell Hardness (H) | 240 | 580 | |||||||
| Modulus of Elasticity (ksi) (E): 30400 | |||||||||
| Machineability General Index: 40% | |||||||||
T.I. Approvals:
Plus a wide range of approvals from most leading OEM’s across Aerospace, Medical, Industrial, and Oil and Gas markets.