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Grey Cast Iron vs. S44635 Stainless Steel

Both grey cast iron and S44635 stainless steel are iron alloys. They have 66% 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 grey cast iron and the bottom bar is S44635 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 300
240
Elastic (Young's, Tensile) Modulus, GPa 180
210
Elongation at Break, % 9.6
23
Fatigue Strength, MPa 69 to 170
390
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 69
81
Shear Strength, MPa 180 to 610
450
Tensile Strength: Ultimate (UTS), MPa 160 to 450
710
Tensile Strength: Yield (Proof), MPa 98 to 290
580

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1380
1460
Melting Onset (Solidus), °C 1180
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 46
16
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
22
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 1.5
4.4
Embodied Energy, MJ/kg 21
62
Embodied Water, L/kg 44
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 37
150
Resilience: Unit (Modulus of Resilience), kJ/m3 27 to 240
810
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 5.8 to 17
25
Strength to Weight: Bending, points 8.7 to 17
23
Thermal Diffusivity, mm2/s 13
4.4
Thermal Shock Resistance, points 6.0 to 17
23

Alloy Composition

Carbon (C), % 3.1 to 3.4
0 to 0.025
Chromium (Cr), % 0
24.5 to 26
Iron (Fe), % 92.1 to 93.9
61.5 to 68.5
Manganese (Mn), % 0.5 to 0.7
0 to 1.0
Molybdenum (Mo), % 0
3.5 to 4.5
Nickel (Ni), % 0
3.5 to 4.5
Niobium (Nb), % 0
0.2 to 0.8
Nitrogen (N), % 0
0 to 0.035
Phosphorus (P), % 0 to 0.9
0 to 0.040
Silicon (Si), % 2.5 to 2.8
0 to 0.75
Sulfur (S), % 0 to 0.15
0 to 0.030
Titanium (Ti), % 0
0.2 to 0.8