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SAE-AISI H22 Steel vs. AISI 418 Stainless Steel

Both SAE-AISI H22 steel and AISI 418 stainless steel are iron alloys. They have 88% 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 H22 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 77
77
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
1100

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1670
1500
Melting Onset (Solidus), °C 1620
1460
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 31
25
Thermal Expansion, µm/m-K 12
10

Otherwise Unclassified Properties

Base Metal Price, % relative 28
15
Density, g/cm3 8.7
8.0
Embodied Carbon, kg CO2/kg material 4.9
2.9
Embodied Energy, MJ/kg 73
41
Embodied Water, L/kg 72
110

Common Calculations

PREN (Pitting Resistance) 21
19
Stiffness to Weight: Axial, points 13
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 8.2
6.7
Thermal Shock Resistance, points 22 to 60
40

Alloy Composition

Carbon (C), % 0.3 to 0.4
0.15 to 0.2
Chromium (Cr), % 1.8 to 3.8
12 to 14
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 82.2 to 87.4
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), % 10 to 11.8
2.5 to 3.5
Vanadium (V), % 0.25 to 0.5
0