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SAE-AISI S7 Steel vs. Grade VDSiCr Steel

Both SAE-AISI S7 steel and grade VDSiCr steel are iron alloys. They have a very high 96% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S7 steel and the bottom bar is grade VDSiCr steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
80
Tensile Strength: Ultimate (UTS), MPa 670 to 2030
1950

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 40
46
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.8
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.0
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
2.2
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.3
1.5
Embodied Energy, MJ/kg 31
20
Embodied Water, L/kg 65
48

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24 to 72
70
Strength to Weight: Bending, points 22 to 46
45
Thermal Diffusivity, mm2/s 11
12
Thermal Shock Resistance, points 22 to 66
58

Alloy Composition

Carbon (C), % 0.45 to 0.55
0.5 to 0.6
Chromium (Cr), % 3.0 to 3.5
0.5 to 0.8
Copper (Cu), % 0 to 0.25
0 to 0.060
Iron (Fe), % 91.6 to 94.9
96.6 to 97.8
Manganese (Mn), % 0.2 to 0.9
0.5 to 0.9
Molybdenum (Mo), % 1.3 to 1.8
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 1.0
1.2 to 1.6
Sulfur (S), % 0 to 0.030
0 to 0.020
Vanadium (V), % 0 to 0.3
0