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S82121 Stainless Steel vs. SAE-AISI H23 Steel

Both S82121 stainless steel and SAE-AISI H23 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 S82121 stainless steel and the bottom bar is SAE-AISI H23 steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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