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AISI 440A Stainless Steel vs. Automotive Grey Cast Iron

Both AISI 440A stainless steel and automotive grey cast iron are iron alloys. There are 26 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 AISI 440A stainless steel and the bottom bar is automotive grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
180
Elongation at Break, % 5.0 to 20
9.6 to 14
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
69 to 70
Tensile Strength: Ultimate (UTS), MPa 730 to 1790
140 to 290
Tensile Strength: Yield (Proof), MPa 420 to 1650
94 to 200

Thermal Properties

Latent Heat of Fusion, J/g 280
260 to 280
Melting Completion (Liquidus), °C 1480
1380 to 1390
Melting Onset (Solidus), °C 1370
1340 to 1350
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 23
41 to 43
Thermal Expansion, µm/m-K 10
12 to 14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.4 to 7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.8 to 9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.9 to 3.0
Density, g/cm3 7.7
7.5 to 7.6
Embodied Carbon, kg CO2/kg material 2.2
1.5 to 1.7
Embodied Energy, MJ/kg 31
21 to 24
Embodied Water, L/kg 120
44 to 51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 87 to 120
18 to 25
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 65
5.2 to 11
Strength to Weight: Bending, points 23 to 43
8.0 to 13
Thermal Diffusivity, mm2/s 6.2
11 to 12
Thermal Shock Resistance, points 26 to 65
4.2 to 8.6