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Automotive Grey Cast Iron vs. S40945 Stainless Steel

Both automotive grey cast iron and S40945 stainless steel are iron alloys. There are 28 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 S40945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
160
Elastic (Young's, Tensile) Modulus, GPa 180
190
Elongation at Break, % 9.6 to 14
25
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69 to 70
75
Tensile Strength: Ultimate (UTS), MPa 140 to 290
430
Tensile Strength: Yield (Proof), MPa 94 to 200
230

Thermal Properties

Latent Heat of Fusion, J/g 260 to 280
270
Melting Completion (Liquidus), °C 1380 to 1390
1450
Melting Onset (Solidus), °C 1340 to 1350
1410
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 41 to 43
26
Thermal Expansion, µm/m-K 12 to 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4 to 7.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9 to 3.0
8.0
Density, g/cm3 7.5 to 7.6
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
2.2
Embodied Energy, MJ/kg 21 to 24
31
Embodied Water, L/kg 44 to 51
94

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
89
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 5.2 to 11
15
Strength to Weight: Bending, points 8.0 to 13
16
Thermal Diffusivity, mm2/s 11 to 12
6.9
Thermal Shock Resistance, points 4.2 to 8.6
15