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SAE-AISI D2 Steel vs. SAE-AISI A7 Steel

Both SAE-AISI D2 steel and SAE-AISI A7 steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D2 steel and the bottom bar is SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
72
Tensile Strength: Ultimate (UTS), MPa 760 to 2000
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 31
37
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
10
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.4
13
Embodied Energy, MJ/kg 50
200
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 15
11
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 72
29 to 77
Strength to Weight: Bending, points 24 to 46
25 to 48
Thermal Diffusivity, mm2/s 8.3
10
Thermal Shock Resistance, points 25 to 67
27 to 72

Alloy Composition

Carbon (C), % 1.4 to 1.6
2.0 to 2.9
Chromium (Cr), % 11 to 13
5.0 to 5.8
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 81.3 to 86.9
81.4 to 87.7
Manganese (Mn), % 0 to 0.6
0 to 0.8
Molybdenum (Mo), % 0.7 to 1.2
0.9 to 1.4
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0 to 1.1
3.9 to 5.2

Comparable Variants