Hardened H23 Tool Steel
Hardened SAE-AISI H23 is SAE-AISI H23 steel in the hardened (H) condition. The graph bars on the material properties cards below compare hardened SAE-AISI H23 to: tool steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Elastic (Young's, Tensile) Modulus
200 GPa 30 x 106 psi
Poisson's Ratio
0.28
Rockwell C Hardness
48
Shear Modulus
80 GPa 12 x 106 psi
Tensile Strength: Ultimate (UTS)
1550 MPa 220 x 103 psi
Thermal Properties
Latent Heat of Fusion
260 J/g
Melting Completion (Liquidus)
1680 °C 3060 °F
Melting Onset (Solidus)
1630 °C 2960 °F
Specific Heat Capacity
440 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
20 W/m-K 12 BTU/h-ft-°F
Thermal Expansion
12 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
34 % relative
Density
8.7 g/cm3 540 lb/ft3
Embodied Carbon
6.9 kg CO2/kg material
Embodied Energy
110 MJ/kg 46 x 103 BTU/lb
Embodied Water
120 L/kg 14 gal/lb
Common Calculations
PREN (Pitting Resistance)
32
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
22 points
Strength to Weight: Axial
49 points
Strength to Weight: Bending
34 points
Thermal Diffusivity
5.2 mm2/s
Thermal Shock Resistance
47 points
Alloy Composition
| Fe | 71.3 to 76.7 | |
| Cr | 11 to 12.8 | |
| W | 11 to 12.8 | |
| V | 0.75 to 1.3 | |
| Si | 0.15 to 0.6 | |
| C | 0.25 to 0.35 | |
| Mn | 0.15 to 0.4 | |
| Ni | 0 to 0.3 | |
| Cu | 0 to 0.25 | |
| P | 0 to 0.030 | |
| S | 0 to 0.030 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM A681: Standard Specification for Tool Steels Alloy
Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016
ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996