Annealed H26 Tool Steel
Annealed SAE-AISI H26 is SAE-AISI H26 steel in the annealed condition. The graph bars on the material properties cards below compare annealed SAE-AISI H26 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
Brinell Hardness
220
Elastic (Young's, Tensile) Modulus
210 GPa 30 x 106 psi
Poisson's Ratio
0.29
Shear Modulus
80 GPa 12 x 106 psi
Tensile Strength: Ultimate (UTS)
720 MPa 110 x 103 psi
Thermal Properties
Latent Heat of Fusion
240 J/g
Melting Completion (Liquidus)
1810 °C 3290 °F
Melting Onset (Solidus)
1760 °C 3190 °F
Specific Heat Capacity
410 J/kg-K 0.1 BTU/lb-°F
Thermal Conductivity
22 W/m-K 12 BTU/h-ft-°F
Thermal Expansion
12 µm/m-K
Otherwise Unclassified Properties
Base Metal Price
45 % relative
Density
9.3 g/cm3 580 lb/ft3
Embodied Carbon
8.1 kg CO2/kg material
Embodied Energy
120 MJ/kg 53 x 103 BTU/lb
Embodied Water
90 L/kg 11 gal/lb
Common Calculations
PREN (Pitting Resistance)
34
Stiffness to Weight: Axial
12 points
Stiffness to Weight: Bending
21 points
Strength to Weight: Axial
22 points
Strength to Weight: Bending
19 points
Thermal Diffusivity
5.6 mm2/s
Thermal Shock Resistance
22 points
Alloy Composition
| Fe | 73.3 to 77.5 | |
| W | 17.3 to 19 | |
| Cr | 3.8 to 4.5 | |
| V | 0.75 to 1.3 | |
| C | 0.45 to 0.55 | |
| Mn | 0.15 to 0.4 | |
| Si | 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, 5th ed., George Roberts et al., 1998
Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016
ASM Specialty Handbook: Carbon and Alloy Steels, J. R. Davis (editor), 1996