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S17400 Stainless Steel vs. Grey Cast Iron

Both S17400 stainless steel and grey cast iron are iron alloys. They have 76% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 11 to 21
9.6
Fatigue Strength, MPa 380 to 670
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
69
Shear Strength, MPa 570 to 830
180 to 610
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
160 to 450
Tensile Strength: Yield (Proof), MPa 580 to 1250
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1440
1380
Melting Onset (Solidus), °C 1400
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 17
46
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 14
1.9
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 2.7
1.5
Embodied Energy, MJ/kg 39
21
Embodied Water, L/kg 130
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
5.8 to 17
Strength to Weight: Bending, points 27 to 35
8.7 to 17
Thermal Diffusivity, mm2/s 4.5
13
Thermal Shock Resistance, points 30 to 46
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.070
3.1 to 3.4
Chromium (Cr), % 15 to 17
0
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
92.1 to 93.9
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Nickel (Ni), % 3.0 to 5.0
0
Niobium (Nb), % 0.15 to 0.45
0
Phosphorus (P), % 0 to 0.040
0 to 0.9
Silicon (Si), % 0 to 1.0
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15