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AISI 422 Stainless Steel vs. AISI 347 Stainless Steel

Both AISI 422 stainless steel and AISI 347 stainless steel are iron alloys. They have 83% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, 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 347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
160 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
34 to 46
Fatigue Strength, MPa 410 to 500
220 to 270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 560 to 660
430 to 460
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
610 to 690
Tensile Strength: Yield (Proof), MPa 670 to 870
240 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 380
480
Maximum Temperature: Mechanical, °C 650
870
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1470
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
16
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 11
19
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.1
3.6
Embodied Energy, MJ/kg 44
52
Embodied Water, L/kg 100
150

Common Calculations

PREN (Pitting Resistance) 17
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
190 to 220
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1910
150 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 38
22 to 25
Strength to Weight: Bending, points 26 to 30
20 to 22
Thermal Diffusivity, mm2/s 6.4
4.3
Thermal Shock Resistance, points 33 to 39
13 to 15

Alloy Composition

Carbon (C), % 0.2 to 0.25
0 to 0.080
Chromium (Cr), % 11 to 12.5
17 to 19
Iron (Fe), % 81.9 to 85.8
64.1 to 74
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
9.0 to 13
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 0.75
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