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SAE-AISI H23 Steel vs. S82121 Stainless Steel

Both SAE-AISI H23 steel and S82121 stainless steel are iron alloys. They have 84% 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 H23 steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 760 to 1550
730

Thermal Properties

Latent Heat of Fusion, J/g 260
290
Melting Completion (Liquidus), °C 1680
1430
Melting Onset (Solidus), °C 1630
1380
Specific Heat Capacity, J/kg-K 440
480
Thermal Conductivity, W/m-K 20
15
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 34
14
Density, g/cm3 8.7
7.7
Embodied Carbon, kg CO2/kg material 6.9
2.8
Embodied Energy, MJ/kg 110
40
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 32
28
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24 to 49
26
Strength to Weight: Bending, points 21 to 34
23
Thermal Diffusivity, mm2/s 5.2
4.0
Thermal Shock Resistance, points 23 to 47
20

Alloy Composition

Carbon (C), % 0.25 to 0.35
0 to 0.035
Chromium (Cr), % 11 to 12.8
21 to 23
Copper (Cu), % 0 to 0.25
0.2 to 1.2
Iron (Fe), % 71.3 to 76.7
66.7 to 75.4
Manganese (Mn), % 0.15 to 0.4
1.0 to 2.5
Molybdenum (Mo), % 0
0.3 to 1.3
Nickel (Ni), % 0 to 0.3
2.0 to 4.0
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.15 to 0.6
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 11 to 12.8
0
Vanadium (V), % 0.75 to 1.3
0