Hardened O6 Tool Steel
Tool Steels
Property Overview
Density7.7g/cm³
Elastic Modulus180GPa
Tensile Strength2070MPa
Yield StrengthUnknown
Brinell HardnessUnknown
Maximum Service TemperatureUnknown
Chemical Composition
C
1.3 to 1.6%
CR
0 to 0.3%
NI
0 to 0.3%
MO
0.2 to 0.3%
MN
0.3 to 1.1%
SI
0.55 to 1.5%
P
0 to 0.030%
S
0 to 0.030%
CU
0 to 0.25%
FE
94.6 to 97.7%
Mechanical
Elastic (Young's, Tensile) Modulus
180 GPa
Poisson's Ratio
0.29
Shear Modulus
71 GPa
Tensile Strength: Ultimate (UTS)
2070 MPa
Hardness
Rockwell C Hardness
64
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Melting Completion (Liquidus)
1430 °C
Melting Onset (Solidus)
1390 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
43 W/m-K
Thermal Diffusivity
12 mm 2 /s
Thermal Expansion
12 µm/m-K
Thermal Shock Resistance
69 points
Electrical
Electrical Conductivity: Equal Volume
7.4 % IACS
Electrical Conductivity: Equal Weight (Specific)
8.6 % IACS
Calculated
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
74 points
Strength to Weight: Bending
47 points
Environmental
Base Metal Price
2.3 % relative
Embodied Carbon
1.5 kg CO 2 /kg material
Embodied Energy
21 MJ/kg
Embodied Energy
21 MJ/kg 8.8 x 10 3 BTU/lb
Embodied Water
47 L/kg
Embodied Water
47 L/kg 5.6 gal/lb
Registered Designations & Aliases
Hardened O6 Tool Steel
Standards
ASTM A681 ASTM A681: Standard Specification for Tool Steels Alloy
SAE J437 SAE J437: Selection and Heat Treatment of Tool and Die Steels
SAE J437 SAE J437: Selection and Heat Treatment of Tool and Die Steels 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