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AWS E409Nb vs. AISI 422 Stainless Steel

Both AWS E409Nb and AISI 422 stainless steel are iron alloys. They have a very high 97% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is AWS E409Nb and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
15 to 17
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 500
910 to 1080
Tensile Strength: Yield (Proof), MPa 380
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1410
1470
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
24
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
11
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.9
3.1
Embodied Energy, MJ/kg 42
44
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 14
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 380
1140 to 1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
32 to 38
Strength to Weight: Bending, points 18
26 to 30
Thermal Diffusivity, mm2/s 6.8
6.4
Thermal Shock Resistance, points 14
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.12
0.2 to 0.25
Chromium (Cr), % 11 to 14
11 to 12.5
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 80.2 to 88.5
81.9 to 85.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.75
0.9 to 1.3
Nickel (Ni), % 0 to 0.6
0.5 to 1.0
Niobium (Nb), % 0.5 to 1.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
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