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Grade FDSiCr Steel vs. Nickel 718

Grade FDSiCr 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 FDSiCr 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, % 42
34 to 64
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 1930
930 to 1530

Thermal Properties

Latent Heat of Fusion, J/g 270
310
Maximum Temperature: Mechanical, °C 410
980
Melting Completion (Liquidus), °C 1440
1340
Melting Onset (Solidus), °C 1400
1260
Specific Heat Capacity, J/kg-K 480
450
Thermal Conductivity, W/m-K 48
11
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
1.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
75
Density, g/cm3 7.7
8.3
Embodied Carbon, kg CO2/kg material 1.5
13
Embodied Energy, MJ/kg 20
190
Embodied Water, L/kg 48
250

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 69
31 to 51
Strength to Weight: Bending, points 44
25 to 35
Thermal Diffusivity, mm2/s 13
3.0
Thermal Shock Resistance, points 58
27 to 44

Alloy Composition

Aluminum (Al), % 0
0.2 to 0.8
Boron (B), % 0
0 to 0.0060
Carbon (C), % 0.5 to 0.6
0 to 0.080
Chromium (Cr), % 0.5 to 0.8
17 to 21
Cobalt (Co), % 0
0 to 1.0
Copper (Cu), % 0 to 0.12
0 to 0.3
Iron (Fe), % 96.5 to 97.8
11.1 to 24.6
Manganese (Mn), % 0.5 to 0.9
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 0.030
0 to 0.015
Silicon (Si), % 1.2 to 1.6
0 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.015
Titanium (Ti), % 0
0.65 to 1.2