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SAE-AISI 8740 Steel vs. Grade VDCrV Steel

Both SAE-AISI 8740 steel and grade VDCrV steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is grade VDCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
520
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
80
Tensile Strength: Ultimate (UTS), MPa 580 to 670
1730

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
410
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
49
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.9
Embodied Energy, MJ/kg 20
26
Embodied Water, L/kg 50
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
61
Strength to Weight: Bending, points 20 to 22
41
Thermal Diffusivity, mm2/s 10
13
Thermal Shock Resistance, points 17 to 20
51

Alloy Composition

Carbon (C), % 0.38 to 0.43
0.62 to 0.72
Chromium (Cr), % 0.4 to 0.6
0.4 to 0.6
Copper (Cu), % 0
0 to 0.060
Iron (Fe), % 96.5 to 97.7
97.8 to 98.8
Manganese (Mn), % 0.75 to 1.0
0.5 to 0.9
Molybdenum (Mo), % 0.2 to 0.3
0
Nickel (Ni), % 0.4 to 0.7
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
0.15 to 0.3
Sulfur (S), % 0 to 0.040
0 to 0.020
Vanadium (V), % 0
0.15 to 0.25