Stainless Steel 440
Material Data Sheet
Often referred to as “razor-blade steel” due to its frequent use in the manufacture of razors and cutlery, grade 440 stainless steel provides high strength and moderate corrosion resistance. Extremely versatile, it’s used in a wide range of industries to create specialized, small-scale products and is available in various types: 440A, 440B, 440C, and 440F.
Chemical Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 78.4 – 83.4 |
| Chromium, Cr | 16.0 – 18.0 |
| Manganese, Mn | ≤ 1.0 |
| Silicon, S | ≤ 1.0 |
| Molybdenum, Mo | ≤ 0.75 |
| Carbon, C | ≤ 0.60 – 0.75 |
| Phosphorus, P | ≤ 0.04 |
| Sulfur, S | ≤ 0.03 |
Physical Properties
| Property | Metric | Imperial |
|---|---|---|
| Density | 7.80 g/cc | 0.282 lb/in³ |
Mechanical Properties
| Property | Metric | Imperial |
|---|---|---|
| Hardness, Rockwell C | 58 | 58 |
| Tensile Strength, Ultimate | 1750 MPa | 254000 psi |
| Tensile Strength, Yield | 1280 MPa | 186000 psi |
| Elongation at Break | 4.0% | 4.0% |
| Modulus of Elasticity | 200 GPa | 29000 ksi |
| Charpy Impact | 19.0 J | 14.0 ft-lb |
Applications
Stainless Steel 440 is used in the following application areas:
- Chisels
- Surgical equipment
- High quality knife blades
- Valve seats
- Rolling element bearings
