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AWS E308LMo vs. AISI 422 Stainless Steel

Both AWS E308LMo and AISI 422 stainless steel are iron alloys. They have 80% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is AWS E308LMo and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
15 to 17
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
76
Tensile Strength: Ultimate (UTS), MPa 580
910 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Melting Completion (Liquidus), °C 1440
1480
Melting Onset (Solidus), °C 1400
1470
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
24
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 19
11
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.8
3.1
Embodied Energy, MJ/kg 53
44
Embodied Water, L/kg 160
100

Common Calculations

PREN (Pitting Resistance) 28
17
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
32 to 38
Strength to Weight: Bending, points 20
26 to 30
Thermal Diffusivity, mm2/s 4.2
6.4
Thermal Shock Resistance, points 15
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.040
0.2 to 0.25
Chromium (Cr), % 18 to 21
11 to 12.5
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 59.6 to 70.5
81.9 to 85.8
Manganese (Mn), % 0.5 to 2.5
0.5 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0.9 to 1.3
Nickel (Ni), % 9.0 to 12
0.5 to 1.0
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