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S31254 Stainless Steel vs. Grey Cast Iron

Both S31254 stainless steel and grey cast iron are iron alloys. They have 55% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S31254 stainless steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 40
9.6
Fatigue Strength, MPa 290
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
69
Shear Strength, MPa 490
180 to 610
Tensile Strength: Ultimate (UTS), MPa 720
160 to 450
Tensile Strength: Yield (Proof), MPa 330
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1420
1180
Specific Heat Capacity, J/kg-K 460
490
Thermal Conductivity, W/m-K 14
46
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 28
1.9
Density, g/cm3 8.0
7.5
Embodied Carbon, kg CO2/kg material 5.5
1.5
Embodied Energy, MJ/kg 74
21
Embodied Water, L/kg 190
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 270
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25
5.8 to 17
Strength to Weight: Bending, points 22
8.7 to 17
Thermal Diffusivity, mm2/s 3.8
13
Thermal Shock Resistance, points 15
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.020
3.1 to 3.4
Chromium (Cr), % 19.5 to 20.5
0
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 51.4 to 56.3
92.1 to 93.9
Manganese (Mn), % 0 to 1.0
0.5 to 0.7
Molybdenum (Mo), % 6.0 to 6.5
0
Nickel (Ni), % 17.5 to 18.5
0
Nitrogen (N), % 0.18 to 0.22
0
Phosphorus (P), % 0 to 0.030
0 to 0.9
Silicon (Si), % 0 to 0.8
2.5 to 2.8
Sulfur (S), % 0 to 0.010
0 to 0.15