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Grade VDC Steel vs. Grade FDCrV Steel

Both grade VDC steel and grade FDCrV steel are iron alloys. Both are furnished in the hardened (H) condition. Their average alloy composition is basically identical.

For each property being compared, the top bar is grade VDC steel and the bottom bar is grade FDCrV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 510
540
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50
42
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 1700
1800

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
48
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.9
Embodied Energy, MJ/kg 19
26
Embodied Water, L/kg 47
49

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60
64
Strength to Weight: Bending, points 40
42
Thermal Diffusivity, mm2/s 14
13
Thermal Shock Resistance, points 50
53

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.62 to 0.72
Chromium (Cr), % 0 to 0.3
0.4 to 0.6
Copper (Cu), % 0 to 0.060
0 to 0.12
Iron (Fe), % 98.3 to 99.35
97.8 to 98.8
Manganese (Mn), % 0.5 to 1.0
0.5 to 0.9
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0.15 to 0.3
0.15 to 0.3
Sulfur (S), % 0 to 0.020
0 to 0.025
Vanadium (V), % 0
0.15 to 0.25