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ACI-ASTM CF10SMnN Steel vs. SAE-AISI 4340 Steel

Both ACI-ASTM CF10SMnN steel and SAE-AISI 4340 steel are iron alloys. They have 66% of their average alloy composition in common. There are 26 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 ACI-ASTM CF10SMnN steel and the bottom bar is SAE-AISI 4340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
210 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 34
12 to 22
Fatigue Strength, MPa 260
330 to 740
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 660
690 to 1280
Tensile Strength: Yield (Proof), MPa 330
470 to 1150

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 900
430
Melting Completion (Liquidus), °C 1360
1460
Melting Onset (Solidus), °C 1310
1420
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 15
3.5
Density, g/cm3 7.5
7.8
Embodied Carbon, kg CO2/kg material 3.1
1.7
Embodied Energy, MJ/kg 45
22
Embodied Water, L/kg 150
53

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
79 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 280
590 to 3490
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 26
24
Strength to Weight: Axial, points 24
24 to 45
Strength to Weight: Bending, points 22
22 to 33
Thermal Shock Resistance, points 15
20 to 38

Alloy Composition

Carbon (C), % 0 to 0.1
0.38 to 0.43
Chromium (Cr), % 16 to 18
0.7 to 0.9
Iron (Fe), % 59.1 to 65.4
95.1 to 96.3
Manganese (Mn), % 7.0 to 9.0
0.6 to 0.8
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 8.0 to 9.0
1.7 to 2.0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.035
Silicon (Si), % 3.5 to 4.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040