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ACI-ASTM CN7MS Steel vs. SAE-AISI 1340 Steel

Both ACI-ASTM CN7MS steel and SAE-AISI 1340 steel are iron alloys. They have 50% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is SAE-AISI 1340 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
11 to 23
Fatigue Strength, MPa 200
220 to 390
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Tensile Strength: Ultimate (UTS), MPa 540
540 to 730
Tensile Strength: Yield (Proof), MPa 230
300 to 620

Thermal Properties

Latent Heat of Fusion, J/g 340
250
Maximum Temperature: Mechanical, °C 1040
400
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
51
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 28
1.9
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.1
1.4
Embodied Energy, MJ/kg 71
19
Embodied Water, L/kg 180
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
78 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
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 3.2
14
Thermal Shock Resistance, points 13
17 to 23

Alloy Composition

Carbon (C), % 0 to 0.070
0.38 to 0.43
Chromium (Cr), % 18 to 20
0
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
97.2 to 97.9
Manganese (Mn), % 0 to 1.0
1.6 to 1.9
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 2.5 to 3.5
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040