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AISI 384 Stainless Steel vs. Ductile Cast Iron

Both AISI 384 stainless steel and ductile cast iron are iron alloys. They have 65% of their average alloy composition in common. There are 25 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 AISI 384 stainless steel and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
160 to 310
Elastic (Young's, Tensile) Modulus, GPa 200
170 to 180
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 76
64 to 70
Tensile Strength: Ultimate (UTS), MPa 480
460 to 920

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Mechanical, °C 910
290
Melting Completion (Liquidus), °C 1420
1160
Melting Onset (Solidus), °C 1380
1120
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 16
31 to 36
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 20
1.9
Density, g/cm3 7.9
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 3.7
1.5
Embodied Energy, MJ/kg 52
21
Embodied Water, L/kg 150
43

Common Calculations

Stiffness to Weight: Axial, points 14
12 to 14
Stiffness to Weight: Bending, points 24
24 to 26
Strength to Weight: Axial, points 17
17 to 35
Strength to Weight: Bending, points 17
18 to 29
Thermal Diffusivity, mm2/s 4.3
8.9 to 10
Thermal Shock Resistance, points 11
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.040
3.0 to 3.5
Chromium (Cr), % 15 to 17
0
Iron (Fe), % 60.9 to 68
93.7 to 95.5
Manganese (Mn), % 0 to 2.0
0
Nickel (Ni), % 17 to 19
0
Phosphorus (P), % 0 to 0.045
0 to 0.080
Silicon (Si), % 0 to 1.0
1.5 to 2.8
Sulfur (S), % 0 to 0.030
0