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Grade VDC Steel vs. Grade TDSiCrV Steel

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

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 510
630
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50
48
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 1700
2100

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.6

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.5 to 0.7
Chromium (Cr), % 0 to 0.3
0.5 to 1.0
Copper (Cu), % 0 to 0.060
0 to 0.1
Iron (Fe), % 98.3 to 99.35
96.1 to 97.8
Manganese (Mn), % 0.5 to 1.0
0.4 to 0.9
Phosphorus (P), % 0 to 0.020
0 to 0.020
Silicon (Si), % 0.15 to 0.3
1.2 to 1.7
Sulfur (S), % 0 to 0.020
0 to 0.020
Vanadium (V), % 0
0.1 to 0.25