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Grade VDSiCr Steel vs. ACI-ASTM CF20 Steel

Both grade VDSiCr steel and ACI-ASTM CF20 steel are iron alloys. They have 72% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is grade VDSiCr steel and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 590
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 1950
530

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Mechanical, °C 410
970
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 46
16
Thermal Expansion, µm/m-K 13
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
16
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 1.5
3.1
Embodied Energy, MJ/kg 20
44
Embodied Water, L/kg 48
150

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 70
19
Strength to Weight: Bending, points 45
19
Thermal Diffusivity, mm2/s 12
4.3
Thermal Shock Resistance, points 58
11

Alloy Composition

Carbon (C), % 0.5 to 0.6
0 to 0.2
Chromium (Cr), % 0.5 to 0.8
18 to 21
Copper (Cu), % 0 to 0.060
0
Iron (Fe), % 96.6 to 97.8
64.2 to 74
Manganese (Mn), % 0.5 to 0.9
0 to 1.5
Nickel (Ni), % 0
8.0 to 11
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 1.2 to 1.6
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040