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Grey Cast Iron vs. AISI 204 Stainless Steel

Both grey cast iron and AISI 204 stainless steel are iron alloys. They have 74% 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 grey cast iron and the bottom bar is AISI 204 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 300
210 to 330
Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 9.6
23 to 39
Fatigue Strength, MPa 69 to 170
320 to 720
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69
77
Shear Strength, MPa 180 to 610
500 to 700
Tensile Strength: Ultimate (UTS), MPa 160 to 450
730 to 1100
Tensile Strength: Yield (Proof), MPa 98 to 290
380 to 1080

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.9
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
10
Density, g/cm3 7.5
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.4
Embodied Energy, MJ/kg 21
35
Embodied Water, L/kg 44
130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 37
240 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 27 to 240
360 to 2940
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 5.8 to 17
27 to 40
Strength to Weight: Bending, points 8.7 to 17
24 to 31
Thermal Diffusivity, mm2/s 13
4.1
Thermal Shock Resistance, points 6.0 to 17
16 to 24

Alloy Composition

Carbon (C), % 3.1 to 3.4
0 to 0.030
Chromium (Cr), % 0
15 to 17
Iron (Fe), % 92.1 to 93.9
69.6 to 76.4
Manganese (Mn), % 0.5 to 0.7
7.0 to 9.0
Nickel (Ni), % 0
1.5 to 3.0
Nitrogen (N), % 0
0.15 to 0.3
Phosphorus (P), % 0 to 0.9
0 to 0.040
Silicon (Si), % 2.5 to 2.8
0 to 1.0
Sulfur (S), % 0 to 0.15
0 to 0.030