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AISI 201 Stainless Steel vs. Grey Cast Iron

Both AISI 201 stainless steel and grey cast iron are iron alloys. They have 72% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 201 stainless steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200 to 440
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 4.6 to 51
9.6
Fatigue Strength, MPa 280 to 600
69 to 170
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
69
Shear Strength, MPa 450 to 840
180 to 610
Tensile Strength: Ultimate (UTS), MPa 650 to 1450
160 to 450
Tensile Strength: Yield (Proof), MPa 300 to 1080
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1410
1380
Melting Onset (Solidus), °C 1370
1180
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.9

Otherwise Unclassified Properties

Base Metal Price, % relative 12
1.9
Density, g/cm3 7.7
7.5
Embodied Carbon, kg CO2/kg material 2.6
1.5
Embodied Energy, MJ/kg 38
21
Embodied Water, L/kg 140
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 61 to 340
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 230 to 2970
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23 to 52
5.8 to 17
Strength to Weight: Bending, points 22 to 37
8.7 to 17
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 14 to 32
6.0 to 17

Alloy Composition

Carbon (C), % 0 to 0.15
3.1 to 3.4
Chromium (Cr), % 16 to 18
0
Iron (Fe), % 67.5 to 75
92.1 to 93.9
Manganese (Mn), % 5.5 to 7.5
0.5 to 0.7
Nickel (Ni), % 3.5 to 5.5
0
Nitrogen (N), % 0 to 0.25
0
Phosphorus (P), % 0 to 0.060
0 to 0.9
Silicon (Si), % 0 to 1.0
2.5 to 2.8
Sulfur (S), % 0 to 0.030
0 to 0.15