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S44725 Stainless Steel vs. Grey Cast Iron

Both S44725 stainless steel and grey cast iron are iron alloys. They have 71% 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 S44725 stainless steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 22
9.6
Fatigue Strength, MPa 210
69 to 170
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 81
69
Shear Strength, MPa 320
180 to 610
Tensile Strength: Ultimate (UTS), MPa 500
160 to 450
Tensile Strength: Yield (Proof), MPa 310
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Melting Completion (Liquidus), °C 1450
1380
Melting Onset (Solidus), °C 1410
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 2.4
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 15
1.9
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 3.1
1.5
Embodied Energy, MJ/kg 44
21
Embodied Water, L/kg 170
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 240
27 to 240
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
5.8 to 17
Strength to Weight: Bending, points 18
8.7 to 17
Thermal Diffusivity, mm2/s 4.6
13
Thermal Shock Resistance, points 16
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.015
3.1 to 3.4
Chromium (Cr), % 25 to 28.5
0
Iron (Fe), % 67.6 to 73.5
92.1 to 93.9
Manganese (Mn), % 0 to 0.4
0.5 to 0.7
Molybdenum (Mo), % 1.5 to 2.5
0
Nickel (Ni), % 0 to 0.3
0
Niobium (Nb), % 0 to 0.26
0
Nitrogen (N), % 0 to 0.018
0
Phosphorus (P), % 0 to 0.040
0 to 0.9
Silicon (Si), % 0 to 0.040
2.5 to 2.8
Sulfur (S), % 0 to 0.020
0 to 0.15
Titanium (Ti), % 0 to 0.26
0