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Grade VDC Steel vs. Nickel 718

Grade VDC steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is grade VDC steel and the bottom bar is nickel 718.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Reduction in Area, % 50
34 to 64
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 1700
930 to 1530

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
980
Melting Completion (Liquidus), °C 1450
1340
Melting Onset (Solidus), °C 1410
1260
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 51
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
75
Density, g/cm3 7.8
8.3
Embodied Carbon, kg CO2/kg material 1.4
13
Embodied Energy, MJ/kg 19
190
Embodied Water, L/kg 47
250

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 60
31 to 51
Strength to Weight: Bending, points 40
25 to 35
Thermal Diffusivity, mm2/s 14
3.0
Thermal Shock Resistance, points 50
27 to 44

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0.6 to 0.75
0 to 0.080
Chromium (Cr), % 0 to 0.3
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0 to 0.060
0 to 0.3
Iron (Fe), % 98.3 to 99.35
11.1 to 24.6
Manganese (Mn), % 0.5 to 1.0
0 to 0.35
Molybdenum (Mo), % 0
2.8 to 3.3
Nickel (Ni), % 0
50 to 55
Niobium (Nb), % 0
4.8 to 5.5
Phosphorus (P), % 0 to 0.020
0 to 0.015
Silicon (Si), % 0.15 to 0.3
0 to 0.35
Sulfur (S), % 0 to 0.020
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2