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S21800 Stainless Steel vs. AISI 422 Stainless Steel

Both S21800 stainless steel and AISI 422 stainless steel are iron alloys. They have 76% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S21800 stainless steel and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 40
15 to 17
Fatigue Strength, MPa 330
410 to 500
Poisson's Ratio 0.28
0.28
Reduction in Area, % 62
34 to 40
Shear Modulus, GPa 75
76
Shear Strength, MPa 510
560 to 660
Tensile Strength: Ultimate (UTS), MPa 740
910 to 1080
Tensile Strength: Yield (Proof), MPa 390
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Maximum Temperature: Corrosion, °C 410
380
Maximum Temperature: Mechanical, °C 900
650
Melting Completion (Liquidus), °C 1360
1480
Melting Onset (Solidus), °C 1310
1470
Specific Heat Capacity, J/kg-K 500
470
Thermal Expansion, µm/m-K 16
10

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.5
7.9
Embodied Carbon, kg CO2/kg material 3.1
3.1
Embodied Energy, MJ/kg 45
44
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 19
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 390
1140 to 1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 27
32 to 38
Strength to Weight: Bending, points 24
26 to 30
Thermal Shock Resistance, points 17
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.1
0.2 to 0.25
Chromium (Cr), % 16 to 18
11 to 12.5
Iron (Fe), % 59.1 to 65.4
81.9 to 85.8
Manganese (Mn), % 7.0 to 9.0
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 8.0 to 9.0
0.5 to 1.0
Nitrogen (N), % 0.080 to 0.18
0
Phosphorus (P), % 0 to 0.060
0 to 0.025
Silicon (Si), % 3.5 to 4.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3