440C Stainless Steel Sheet/Plate
Grade 440C stainless steel is a high carbon martensitic stainless steel. It has high strength, moderate corrosion resistance, and good hardness and wear resistance. Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts.
Chemical Composition
(Maximum, unless range is indicated)
| Grade | Ni | Mo | Cu | Mn | C | Cr | P | S | Si |
| 440C | 0.75 | 0.75 | 0.50 | 1.00 | 0.95 – 1.2 | 16 – 18 | 0.04 | 0.03 | 1.00 |
Physical Properties
| Density kg/mᶟ | Thermal Conductivity at 212°F (100°C) | Electrical Resistivity | Elastic Modulus (Gpa) |
| 7650 | 24.2 | 600 | 200 |
Mechanical Properties
| Yield Strength 0.2% Proof (Mpa) | Tensile Strength (Mpa) | Elongation (% in 50mm) | Hardness (HB) |
| 448 | 75 | 14 | 269 max |
