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SAE-AISI 8740 Steel vs. Austenitic Nodular Cast Iron

Both SAE-AISI 8740 steel and austenitic nodular cast iron are iron alloys. There are 24 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 SAE-AISI 8740 steel and the bottom bar is austenitic nodular cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
140 to 240
Elastic (Young's, Tensile) Modulus, GPa 190
180 to 190
Elongation at Break, % 11 to 23
6.8 to 34
Poisson's Ratio 0.29
0.29 to 0.3
Shear Modulus, GPa 73
70 to 72
Tensile Strength: Ultimate (UTS), MPa 580 to 670
430 to 500
Tensile Strength: Yield (Proof), MPa 380 to 570
190 to 240

Thermal Properties

Latent Heat of Fusion, J/g 250
280 to 350
Melting Completion (Liquidus), °C 1460
1340 to 1400
Melting Onset (Solidus), °C 1420
1300 to 1360
Specific Heat Capacity, J/kg-K 470
470 to 490
Thermal Expansion, µm/m-K 13
13 to 14

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
16 to 25
Density, g/cm3 7.8
7.7 to 8.0
Embodied Carbon, kg CO2/kg material 1.5
3.5 to 4.9
Embodied Energy, MJ/kg 20
48 to 68
Embodied Water, L/kg 50
91 to 120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
24 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
98 to 160
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24 to 25
Strength to Weight: Axial, points 20 to 24
15 to 18
Strength to Weight: Bending, points 20 to 22
16 to 18
Thermal Shock Resistance, points 17 to 20
12 to 15