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ACI-ASTM CA28MWV Steel vs. SAE-AISI 4340M Steel

Both ACI-ASTM CA28MWV steel and SAE-AISI 4340M steel are iron alloys. They have 87% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CA28MWV steel and the bottom bar is SAE-AISI 4340M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
710
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 11
6.0
Fatigue Strength, MPa 470
690
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
72
Tensile Strength: Ultimate (UTS), MPa 1080
2340
Tensile Strength: Yield (Proof), MPa 870
1240

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 740
430
Melting Completion (Liquidus), °C 1470
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 25
38
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.6
7.8
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
9.1

Otherwise Unclassified Properties

Base Metal Price, % relative 11
3.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.9
Embodied Energy, MJ/kg 44
26
Embodied Water, L/kg 100
55

Common Calculations

PREN (Pitting Resistance) 17
2.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1920
4120
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 38
84
Strength to Weight: Bending, points 30
51
Thermal Diffusivity, mm2/s 6.6
10
Thermal Shock Resistance, points 40
70

Alloy Composition

Carbon (C), % 0.2 to 0.28
0.38 to 0.43
Chromium (Cr), % 11 to 12.5
0.7 to 1.0
Iron (Fe), % 81.4 to 85.8
93.3 to 94.8
Manganese (Mn), % 0.5 to 1.0
0.65 to 0.9
Molybdenum (Mo), % 0.9 to 1.3
0.35 to 0.45
Nickel (Ni), % 0.5 to 1.0
1.7 to 2.0
Phosphorus (P), % 0 to 0.030
0 to 0.012
Silicon (Si), % 0 to 1.0
1.5 to 1.8
Sulfur (S), % 0 to 0.030
0 to 0.012
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0.050 to 0.1