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S32750 Stainless Steel vs. Ductile Cast Iron

Both S32750 stainless steel and ductile cast iron are iron alloys. They have 63% 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 S32750 stainless steel and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
160 to 310
Elastic (Young's, Tensile) Modulus, GPa 210
170 to 180
Elongation at Break, % 17
2.1 to 20
Poisson's Ratio 0.27
0.28 to 0.31
Shear Modulus, GPa 81
64 to 70
Shear Strength, MPa 530
420 to 800
Tensile Strength: Ultimate (UTS), MPa 860
460 to 920
Tensile Strength: Yield (Proof), MPa 590
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Mechanical, °C 1100
290
Melting Completion (Liquidus), °C 1450
1160
Melting Onset (Solidus), °C 1400
1120
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
31 to 36
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.8 to 9.4

Otherwise Unclassified Properties

Base Metal Price, % relative 21
1.9
Density, g/cm3 7.8
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 4.1
1.5
Embodied Energy, MJ/kg 56
21
Embodied Water, L/kg 180
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 860
280 to 1330
Stiffness to Weight: Axial, points 15
12 to 14
Stiffness to Weight: Bending, points 25
24 to 26
Strength to Weight: Axial, points 31
17 to 35
Strength to Weight: Bending, points 26
18 to 29
Thermal Diffusivity, mm2/s 4.0
8.9 to 10
Thermal Shock Resistance, points 25
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.030
3.0 to 3.5
Chromium (Cr), % 24 to 26
0
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 58.1 to 66.8
93.7 to 95.5
Manganese (Mn), % 0 to 1.2
0
Molybdenum (Mo), % 3.0 to 5.0
0
Nickel (Ni), % 6.0 to 8.0
0
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.080
Silicon (Si), % 0 to 0.8
1.5 to 2.8
Sulfur (S), % 0 to 0.020
0