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 1040C.
 
* 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 370C may result in some loss in corrosion resistance.