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SAE-AISI 4320 Steel vs. ACI-ASTM CA28MWV Steel

Both SAE-AISI 4320 steel and ACI-ASTM CA28MWV steel are iron alloys. They have 86% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 4320 steel and the bottom bar is ACI-ASTM CA28MWV steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 240
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 21 to 29
11
Fatigue Strength, MPa 320
470
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 570 to 790
1080
Tensile Strength: Yield (Proof), MPa 430 to 460
870

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 420
740
Melting Completion (Liquidus), °C 1460
1470
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 46
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
4.6
Electrical Conductivity: Equal Weight (Specific), % IACS 8.5
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
11
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.7
3.1
Embodied Energy, MJ/kg 22
44
Embodied Water, L/kg 52
100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
110
Resilience: Unit (Modulus of Resilience), kJ/m3 480 to 560
1920
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20 to 28
38
Strength to Weight: Bending, points 19 to 24
30
Thermal Diffusivity, mm2/s 13
6.6
Thermal Shock Resistance, points 19 to 27
40

Alloy Composition

Carbon (C), % 0.17 to 0.22
0.2 to 0.28
Chromium (Cr), % 0.4 to 0.6
11 to 12.5
Iron (Fe), % 95.8 to 97
81.4 to 85.8
Manganese (Mn), % 0.45 to 0.65
0.5 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0.9 to 1.3
Nickel (Ni), % 1.7 to 2.0
0.5 to 1.0
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3