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SAE-AISI H24 Steel vs. AISI 418 Stainless Steel

Both SAE-AISI H24 steel and AISI 418 stainless steel are iron alloys. They have 87% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H24 steel and the bottom bar is AISI 418 stainless 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
1100

Thermal Properties

Latent Heat of Fusion, J/g 240
270
Melting Completion (Liquidus), °C 1750
1500
Melting Onset (Solidus), °C 1700
1460
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 27
25
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 37
15
Density, g/cm3 9.1
8.0
Embodied Carbon, kg CO2/kg material 6.1
2.9
Embodied Energy, MJ/kg 93
41
Embodied Water, L/kg 78
110

Common Calculations

PREN (Pitting Resistance) 28
19
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
24
Strength to Weight: Axial, points 22 to 61
38
Strength to Weight: Bending, points 20 to 39
29
Thermal Diffusivity, mm2/s 6.9
6.7
Thermal Shock Resistance, points 22 to 61
40

Alloy Composition

Carbon (C), % 0.42 to 0.53
0.15 to 0.2
Chromium (Cr), % 2.5 to 3.5
12 to 14
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78 to 82.4
78.5 to 83.6
Manganese (Mn), % 0.15 to 0.4
0 to 0.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.3
1.8 to 2.2
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 14 to 16
2.5 to 3.5
Vanadium (V), % 0.4 to 0.6
0