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Automotive Grey Cast Iron vs. AISI 403 Stainless Steel

Both automotive grey cast iron and AISI 403 stainless steel are iron alloys. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is automotive grey cast iron and the bottom bar is AISI 403 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 280
190 to 240
Elastic (Young's, Tensile) Modulus, GPa 180
190
Elongation at Break, % 9.6 to 14
16 to 25
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 69 to 70
76
Tensile Strength: Ultimate (UTS), MPa 140 to 290
530 to 780
Tensile Strength: Yield (Proof), MPa 94 to 200
280 to 570

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
1400
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 41 to 43
28
Thermal Expansion, µm/m-K 12 to 14
9.9

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
6.5
Density, g/cm3 7.5 to 7.6
7.8
Embodied Carbon, kg CO2/kg material 1.5 to 1.7
1.9
Embodied Energy, MJ/kg 21 to 24
27
Embodied Water, L/kg 44 to 51
99

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 25
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 25 to 110
210 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 5.2 to 11
19 to 28
Strength to Weight: Bending, points 8.0 to 13
19 to 24
Thermal Diffusivity, mm2/s 11 to 12
7.6
Thermal Shock Resistance, points 4.2 to 8.6
20 to 29