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SAE-AISI 8640 Steel vs. SAE-AISI D3 Steel

Both SAE-AISI 8640 steel and SAE-AISI D3 steel are iron alloys. They have 85% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8640 steel and the bottom bar is SAE-AISI D3 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
9.8 to 15
Fatigue Strength, MPa 270
310 to 940
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
74
Shear Strength, MPa 360
470 to 1220
Tensile Strength: Ultimate (UTS), MPa 570
770 to 2050
Tensile Strength: Yield (Proof), MPa 380
480 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
31
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
8.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.5
3.2
Embodied Energy, MJ/kg 20
48
Embodied Water, L/kg 50
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
97 to 180
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20
28 to 74
Strength to Weight: Bending, points 20
24 to 47
Thermal Diffusivity, mm2/s 10
8.3
Thermal Shock Resistance, points 17
23 to 63

Alloy Composition

Carbon (C), % 0.38 to 0.43
2.0 to 2.4
Chromium (Cr), % 0.4 to 0.6
11 to 13.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 96.6 to 97.8
80.3 to 87
Manganese (Mn), % 0.75 to 1.0
0 to 0.6
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.4 to 0.7
0 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
0 to 1.0
Vanadium (V), % 0
0 to 1.0