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Automotive Grey Cast Iron vs. S35125 Stainless Steel

Both automotive grey cast iron and S35125 stainless steel are iron alloys. There are 27 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 automotive grey cast iron and the bottom bar is S35125 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 180
200
Elongation at Break, % 9.6 to 14
39
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69 to 70
78
Tensile Strength: Ultimate (UTS), MPa 140 to 290
540
Tensile Strength: Yield (Proof), MPa 94 to 200
230

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
300
Melting Completion (Liquidus), °C 1380 to 1390
1430
Melting Onset (Solidus), °C 1340 to 1350
1380
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 41 to 43
12
Thermal Expansion, µm/m-K 12 to 14
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
36
Density, g/cm3 7.5 to 7.6
8.1
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
6.4
Embodied Energy, MJ/kg 21 to 24
89
Embodied Water, L/kg 44 to 51
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
170
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 5.2 to 11
19
Strength to Weight: Bending, points 8.0 to 13
18
Thermal Diffusivity, mm2/s 11 to 12
3.1
Thermal Shock Resistance, points 4.2 to 8.6
12