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Grade FDSiCr Steel vs. Grade VDC Steel

Both grade FDSiCr steel and grade VDC 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 FDSiCr steel and the bottom bar is grade VDC steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 580
510
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Reduction in Area, % 42
50
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 1930
1700

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 410
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 48
51
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
1.9
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
19
Embodied Water, L/kg 48
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 69
60
Strength to Weight: Bending, points 44
40
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 58
50

Alloy Composition

Carbon (C), % 0.5 to 0.6
0.6 to 0.75
Chromium (Cr), % 0.5 to 0.8
0 to 0.3
Copper (Cu), % 0 to 0.12
0 to 0.060
Iron (Fe), % 96.5 to 97.8
98.3 to 99.35
Manganese (Mn), % 0.5 to 0.9
0.5 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 1.2 to 1.6
0.15 to 0.3
Sulfur (S), % 0 to 0.025
0 to 0.020