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Grade FDSiCr Steel vs. AISI 418 Stainless Steel

Both grade FDSiCr 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 FDSiCr steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 580
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Reduction in Area, % 42
50
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 1930
1100

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Mechanical, °C 410
770
Melting Completion (Liquidus), °C 1440
1500
Melting Onset (Solidus), °C 1400
1460
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 48
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
15
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 1.5
2.9
Embodied Energy, MJ/kg 20
41
Embodied Water, L/kg 48
110

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 69
38
Strength to Weight: Bending, points 44
29
Thermal Diffusivity, mm2/s 13
6.7
Thermal Shock Resistance, points 58
40

Alloy Composition

Carbon (C), % 0.5 to 0.6
0.15 to 0.2
Chromium (Cr), % 0.5 to 0.8
12 to 14
Copper (Cu), % 0 to 0.12
0
Iron (Fe), % 96.5 to 97.8
78.5 to 83.6
Manganese (Mn), % 0.5 to 0.9
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 1.2 to 1.6
0 to 0.5
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5