440C STAINLESS TOOL STEEL
| TYPICAL MECHANICAL PROPERTIES | |
| The following table gives typical mechanical properties for 440C from various tempering temperatures, holding two hours at temperature, after oil quenching from 1040°C. |
|
| *
Tempering °C |
Hardness HRC |
U.T.S. KSI |
Tensile Yield KSI | %
Elongation in 50 mm. |
%
Reduction of Area |
Compressive Strength KSI |
| Annealed As Quenched |
98 | 110 | 70 | 15 | 30 | - - |
| 1040 | 61 / 62 | - - | - - | - - | - - | - - |
| 260 | 57 | 265 | 230 | - - | - - | 350 |
| 320 | 53 / 56 | 267 | 230 | - - | - - | 338 |
| 430 | 54 | 267 | 230 | - - | - - | 330 |
| 540 | 43 / 45 | 248 | 200 | - - | - - | 321 |
| 650 | 38 / 39 | 150 | 130 | - - | - - | 181 |
* Note: Tempering above 370°C may result in some loss in corrosion resistance. |