Annealed D7 Tool Steel
Tool Steels
Property Overview
Density7.6g/cm³
Elastic Modulus190GPa
Tensile Strength800MPa
Yield StrengthUnknown
Brinell Hardness240HB
Maximum Service TemperatureUnknown
Chemical Composition
C
2.2 to 2.5%
CR
11.5 to 13.5%
NI
0 to 0.3%
MO
0.7 to 1.2%
MN
0 to 0.6%
SI
0 to 0.6%
P
0 to 0.030%
S
0 to 0.030%
CU
0 to 0.25%
V
3.8 to 4.4%
FE
76.6 to 81.9%
Mechanical
Elastic (Young's, Tensile) Modulus
190 GPa
Poisson's Ratio
0.28
Shear Modulus
73 GPa
Tensile Strength: Ultimate (UTS)
800 MPa
Hardness
Brinell Hardness
240
Rockwell B Hardness
100
Physical
Density
7.6 g/cm 3
Thermal
Latent Heat of Fusion
270 J/g
Melting Completion (Liquidus)
1440 °C
Melting Onset (Solidus)
1400 °C
Specific Heat Capacity
480 J/kg-K
Thermal Conductivity
27 W/m-K
Thermal Diffusivity
7.4 mm 2 /s
Thermal Expansion
11 µm/m-K
Thermal Shock Resistance
27 points
Calculated
PREN (Pitting Resistance)
16
Stiffness to Weight: Axial
14 points
Stiffness to Weight: Bending
25 points
Strength to Weight: Axial
29 points
Strength to Weight: Bending
25 points
Environmental
Base Metal Price
10 % relative
Embodied Carbon
11 kg CO 2 /kg material
Embodied Energy
180 MJ/kg
Embodied Energy
180 MJ/kg 78 x 10 3 BTU/lb
Embodied Water
130 L/kg
Embodied Water
130 L/kg 15 gal/lb
Registered Designations & Aliases
Annealed D7 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