Hardened A7 Tool Steel
Tool Steels
Property Overview
Density7.7g/cm³
Elastic Modulus190GPa
Tensile Strength2150MPa
Yield StrengthUnknown
Brinell HardnessUnknown
Maximum Service TemperatureUnknown
Chemical Composition
C
2.0 to 2.9%
CR
5.0 to 5.8%
NI
0 to 0.3%
MO
0.9 to 1.4%
MN
0 to 0.8%
SI
0 to 0.5%
P
0 to 0.030%
S
0 to 0.030%
CU
0 to 0.25%
V
3.9 to 5.2%
W
0.5 to 1.5%
FE
81.4 to 87.7%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Poisson's Ratio
0.29
Shear Modulus
72 GPa
Tensile Strength: Ultimate (UTS)
2150 MPa
Hardness
Rockwell C Hardness
66
Physical
Density
7.7 g/cm 3
Thermal
Latent Heat of Fusion
260 J/g
Melting Completion (Liquidus)
1470 °C
Melting Onset (Solidus)
1430 °C
Specific Heat Capacity
470 J/kg-K
Thermal Conductivity
37 W/m-K
Thermal Diffusivity
10 mm 2 /s
Thermal Expansion
12 µm/m-K
Thermal Shock Resistance
72 points
Calculated
PREN (Pitting Resistance)
11
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
77 points
Strength to Weight: Bending
48 points
Environmental
Base Metal Price
10 % relative
Embodied Carbon
13 kg CO 2 /kg material
Embodied Energy
200 MJ/kg
Embodied Energy
200 MJ/kg 85 x 10 3 BTU/lb
Embodied Water
100 L/kg
Embodied Water
100 L/kg 12 gal/lb
Registered Designations & Aliases
Hardened A7 Tool Steel
Standards
ASTM A681 ASTM A681: Standard Specification for Tool Steels Alloy
ASTM A681 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