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S17400 Stainless Steel vs. Automotive Malleable Cast Iron

Both S17400 stainless steel and automotive malleable cast iron are iron alloys. They have 76% of their average alloy composition in common. There are 28 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 S17400 stainless steel and the bottom bar is automotive malleable cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
130 to 290
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 11 to 21
1.0 to 10
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
70
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
350 to 720
Tensile Strength: Yield (Proof), MPa 580 to 1250
220 to 590

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1440
1410
Melting Onset (Solidus), °C 1400
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
41
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 14
1.9
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.7
1.5
Embodied Energy, MJ/kg 39
20
Embodied Water, L/kg 130
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
6.8 to 30
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
130 to 950
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
13 to 26
Strength to Weight: Bending, points 27 to 35
14 to 24
Thermal Diffusivity, mm2/s 4.5
11
Thermal Shock Resistance, points 30 to 46
9.9 to 21

Alloy Composition

Carbon (C), % 0 to 0.070
2.2 to 2.9
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
93.6 to 96.7
Manganese (Mn), % 0 to 1.0
0.15 to 1.3
Nickel (Ni), % 3.0 to 5.0
0
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0.020 to 0.15
Silicon (Si), % 0 to 1.0
0.9 to 1.9
Sulfur (S), % 0 to 0.030
0.020 to 0.2