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ACI-ASTM CF8M Steel vs. SAE-AISI 1340 Steel

Both ACI-ASTM CF8M steel and SAE-AISI 1340 steel are iron alloys. They have 67% 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 CF8M steel and the bottom bar is SAE-AISI 1340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 50
11 to 23
Fatigue Strength, MPa 280
220 to 390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
72
Tensile Strength: Ultimate (UTS), MPa 540
540 to 730
Tensile Strength: Yield (Proof), MPa 290
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1000
400
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
51
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
1.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.8
1.4
Embodied Energy, MJ/kg 53
19
Embodied Water, L/kg 160
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 210
240 to 1040
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
19 to 26
Strength to Weight: Bending, points 19
19 to 23
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 12
17 to 23

Alloy Composition

Carbon (C), % 0 to 0.080
0.38 to 0.43
Chromium (Cr), % 18 to 21
0
Iron (Fe), % 60.3 to 71
97.2 to 97.9
Manganese (Mn), % 0 to 1.5
1.6 to 1.9
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 9.0 to 12
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