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S40975 Stainless Steel vs. Grey Cast Iron

Both S40975 stainless steel and grey cast iron are iron alloys. They have 88% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S40975 stainless steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 22
9.6
Fatigue Strength, MPa 210
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
69
Shear Strength, MPa 290
180 to 610
Tensile Strength: Ultimate (UTS), MPa 460
160 to 450
Tensile Strength: Yield (Proof), MPa 310
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Melting Completion (Liquidus), °C 1450
1380
Melting Onset (Solidus), °C 1400
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 26
46
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
1.9
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 28
21
Embodied Water, L/kg 95
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 250
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 17
5.8 to 17
Strength to Weight: Bending, points 17
8.7 to 17
Thermal Diffusivity, mm2/s 7.0
13
Thermal Shock Resistance, points 17
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.030
3.1 to 3.4
Chromium (Cr), % 10.5 to 11.7
0
Iron (Fe), % 84.4 to 89
92.1 to 93.9
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Nickel (Ni), % 0.5 to 1.0
0
Nitrogen (N), % 0 to 0.030
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
Titanium (Ti), % 0 to 0.75
0