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SAE-AISI H24 Steel vs. ACI-ASTM CN7MS Steel

Both SAE-AISI H24 steel and ACI-ASTM CN7MS steel are iron alloys. They have 53% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H24 steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
540

Thermal Properties

Latent Heat of Fusion, J/g 240
340
Melting Completion (Liquidus), °C 1750
1400
Melting Onset (Solidus), °C 1700
1350
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 27
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 37
28
Density, g/cm3 9.1
7.9
Embodied Carbon, kg CO2/kg material 6.1
5.1
Embodied Energy, MJ/kg 93
71
Embodied Water, L/kg 78
180

Common Calculations

PREN (Pitting Resistance) 28
28
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 61
19
Strength to Weight: Bending, points 20 to 39
19
Thermal Diffusivity, mm2/s 6.9
3.2
Thermal Shock Resistance, points 22 to 61
13

Alloy Composition

Carbon (C), % 0.42 to 0.53
0 to 0.070
Chromium (Cr), % 2.5 to 3.5
18 to 20
Copper (Cu), % 0 to 0.25
1.5 to 2.0
Iron (Fe), % 78 to 82.4
45.4 to 53.5
Manganese (Mn), % 0.15 to 0.4
0 to 1.0
Molybdenum (Mo), % 0
2.5 to 3.0
Nickel (Ni), % 0 to 0.3
22 to 25
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
2.5 to 3.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0