Annealed T8 Tool Steel
Tool Steels
Property Overview
Density9g/cm³
Elastic Modulus200GPa
Tensile Strength780MPa
Yield StrengthUnknown
Brinell Hardness240HB
Maximum Service TemperatureUnknown
Chemical Composition
C
0.75 to 0.85%
CR
3.8 to 4.5%
NI
0 to 0.3%
MO
0.4 to 1.0%
MN
0.2 to 0.4%
SI
0.2 to 0.4%
P
0 to 0.030%
S
0 to 0.030%
CU
0 to 0.25%
V
1.8 to 2.4%
CO
4.3 to 5.8%
W
13.3 to 14.8%
FE
69.3 to 75.4%
Mechanical
Elastic (Young's, Tensile) Modulus
200 GPa
Poisson's Ratio
0.29
Shear Modulus
78 GPa
Tensile Strength: Ultimate (UTS)
780 MPa
Hardness
Brinell Hardness
240
Rockwell B Hardness
100
Physical
Density
9.0 g/cm 3
Thermal
Latent Heat of Fusion
250 J/g
Melting Completion (Liquidus)
1730 °C
Melting Onset (Solidus)
1670 °C
Specific Heat Capacity
420 J/kg-K
Thermal Conductivity
18 W/m-K
Thermal Diffusivity
4.8 mm 2 /s
Thermal Expansion
12 µm/m-K
Thermal Shock Resistance
24 points
Calculated
PREN (Pitting Resistance)
30
Stiffness to Weight: Axial
12 points
Stiffness to Weight: Bending
22 points
Strength to Weight: Axial
24 points
Strength to Weight: Bending
21 points
Environmental
Base Metal Price
45 % relative
Embodied Carbon
10 kg CO 2 /kg material
Embodied Energy
160 MJ/kg
Embodied Energy
160 MJ/kg 67 x 10 3 BTU/lb
Embodied Water
120 L/kg
Embodied Water
120 L/kg 14 gal/lb
Registered Designations & Aliases
Annealed T8 Tool Steel
Standards
ASTM A600 ASTM A600: Standard Specification for Tool Steel High Speed
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 A600: Standard Specification for Tool Steel High Speed Tool Steels, 5th ed., George Roberts et al., 1998 Tool Steels: Properties and Performance, Rafael A. Mesquita (editor), 2016