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ACI-ASTM CE30 Steel vs. SAE-AISI 4140 Steel

Both ACI-ASTM CE30 steel and SAE-AISI 4140 steel are iron alloys. They have 63% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CE30 steel and the bottom bar is SAE-AISI 4140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
200 to 310
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
11 to 26
Fatigue Strength, MPa 170
360 to 650
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 630
690 to 1080
Tensile Strength: Yield (Proof), MPa 310
590 to 990

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Maximum Temperature: Mechanical, °C 1100
420
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 14
43
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.4
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
1.5
Embodied Energy, MJ/kg 49
20
Embodied Water, L/kg 180
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 59
74 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 240
920 to 2590
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
25 to 38
Strength to Weight: Bending, points 21
22 to 30
Thermal Diffusivity, mm2/s 3.6
12
Thermal Shock Resistance, points 13
20 to 32

Alloy Composition

Carbon (C), % 0 to 0.3
0.38 to 0.43
Chromium (Cr), % 26 to 30
0.8 to 1.1
Iron (Fe), % 55.1 to 66
96.8 to 97.8
Manganese (Mn), % 0 to 1.5
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 8.0 to 11
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 2.0
0.15 to 0.35
Sulfur (S), % 0 to 0.040
0 to 0.040