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Grade VDSiCrV Steel vs. Grade FDC Steel

Both grade VDSiCrV steel and grade FDC steel are iron alloys. Both are furnished in the hardened (H) condition. They have a very high 99% of their average alloy composition in common.

For each property being compared, the top bar is grade VDSiCrV steel and the bottom bar is grade FDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 630
510
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Reduction in Area, % 48
42
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 2100
1680

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 420
400
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 47
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
1.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.9
1.4
Embodied Energy, MJ/kg 26
19
Embodied Water, L/kg 50
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 75
60
Strength to Weight: Bending, points 47
40
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 63
50

Alloy Composition

Carbon (C), % 0.5 to 0.7
0.6 to 0.75
Chromium (Cr), % 0.5 to 1.0
0 to 0.3
Copper (Cu), % 0 to 0.060
0 to 0.12
Iron (Fe), % 96.1 to 97.8
98 to 99.4
Manganese (Mn), % 0.4 to 0.9
0.5 to 1.2
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 1.2 to 1.7
0.1 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.025
Vanadium (V), % 0.1 to 0.25
0