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Grade VDC Steel vs. AISI 418 Stainless Steel

Both grade VDC steel and AISI 418 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 26 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 VDC steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 510
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Reduction in Area, % 50
50
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 1700
1100

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 400
770
Melting Completion (Liquidus), °C 1450
1500
Melting Onset (Solidus), °C 1410
1460
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
15
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.4
2.9
Embodied Energy, MJ/kg 19
41
Embodied Water, L/kg 47
110

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 60
38
Strength to Weight: Bending, points 40
29
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 50
40

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.15 to 0.2
Chromium (Cr), % 0 to 0.3
12 to 14
Copper (Cu), % 0 to 0.060
0
Iron (Fe), % 98.3 to 99.35
78.5 to 83.6
Manganese (Mn), % 0.5 to 1.0
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.15 to 0.3
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5