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AISI 422 Stainless Steel vs. AISI 384 Stainless Steel

Both AISI 422 stainless steel and AISI 384 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AISI 422 stainless steel and the bottom bar is AISI 384 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
480

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 380
410
Maximum Temperature: Mechanical, °C 650
910
Melting Completion (Liquidus), °C 1480
1420
Melting Onset (Solidus), °C 1470
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
16
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
20
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.1
3.7
Embodied Energy, MJ/kg 44
52
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 17
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 38
17
Strength to Weight: Bending, points 26 to 30
17
Thermal Diffusivity, mm2/s 6.4
4.3
Thermal Shock Resistance, points 33 to 39
11

Alloy Composition

Carbon (C), % 0.2 to 0.25
0 to 0.040
Chromium (Cr), % 11 to 12.5
15 to 17
Iron (Fe), % 81.9 to 85.8
60.9 to 68
Manganese (Mn), % 0.5 to 1.0
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.3
0
Nickel (Ni), % 0.5 to 1.0
17 to 19
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0