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S31277 Stainless Steel vs. Ductile Cast Iron

Both S31277 stainless steel and ductile cast iron are iron alloys. They have 41% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is S31277 stainless steel and the bottom bar is ductile cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
170 to 180
Elongation at Break, % 45
2.1 to 20
Poisson's Ratio 0.28
0.28 to 0.31
Shear Modulus, GPa 80
64 to 70
Shear Strength, MPa 600
420 to 800
Tensile Strength: Ultimate (UTS), MPa 860
460 to 920
Tensile Strength: Yield (Proof), MPa 410
310 to 670

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Mechanical, °C 1100
290
Melting Completion (Liquidus), °C 1460
1160
Melting Onset (Solidus), °C 1410
1120
Specific Heat Capacity, J/kg-K 460
490
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 36
1.9
Density, g/cm3 8.1
7.1 to 7.5
Embodied Carbon, kg CO2/kg material 6.7
1.5
Embodied Energy, MJ/kg 90
21
Embodied Water, L/kg 220
43

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
17 to 80
Resilience: Unit (Modulus of Resilience), kJ/m3 410
280 to 1330
Stiffness to Weight: Axial, points 14
12 to 14
Stiffness to Weight: Bending, points 24
24 to 26
Strength to Weight: Axial, points 29
17 to 35
Strength to Weight: Bending, points 25
18 to 29
Thermal Shock Resistance, points 19
17 to 35

Alloy Composition

Carbon (C), % 0 to 0.020
3.0 to 3.5
Chromium (Cr), % 20.5 to 23
0
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
93.7 to 95.5
Manganese (Mn), % 0 to 3.0
0
Molybdenum (Mo), % 6.5 to 8.0
0
Nickel (Ni), % 26 to 28
0
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.080
Silicon (Si), % 0 to 0.5
1.5 to 2.8
Sulfur (S), % 0 to 0.010
0