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SAE-AISI 8740 Steel vs. ASTM A148 Cast Steel

Both SAE-AISI 8740 steel and ASTM A148 cast steel are iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is ASTM A148 cast steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 200
190 to 390
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 23
5.7 to 25
Fatigue Strength, MPa 270 to 350
280 to 670
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 580 to 670
630 to 1300
Tensile Strength: Yield (Proof), MPa 380 to 570
390 to 1160

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400 to 430
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 39
37 to 47
Thermal Expansion, µm/m-K 13
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.3 to 7.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.3 to 8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 2.6
2.3 to 3.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.5 to 1.7
Embodied Energy, MJ/kg 20
20 to 22
Embodied Water, L/kg 50
48 to 53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
71 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 390 to 850
400 to 3570
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 20 to 24
22 to 46
Strength to Weight: Bending, points 20 to 22
21 to 34
Thermal Diffusivity, mm2/s 10
9.9 to 13
Thermal Shock Resistance, points 17 to 20
18 to 38

Comparable Variants