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AISI 409 Stainless Steel vs. AWS E349

Both AISI 409 stainless steel and AWS E349 are iron alloys. They have 78% of their average alloy composition in common. There are 25 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 AISI 409 stainless steel and the bottom bar is AWS E349.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 24
29
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 420
770

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Melting Completion (Liquidus), °C 1450
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 11
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
25
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.0
4.9
Embodied Energy, MJ/kg 28
72
Embodied Water, L/kg 94
150

Common Calculations

PREN (Pitting Resistance) 11
24
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 15
27
Strength to Weight: Bending, points 16
24
Thermal Diffusivity, mm2/s 6.7
4.1
Thermal Shock Resistance, points 15
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.13
Chromium (Cr), % 10.5 to 11.7
18 to 21
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 84.9 to 89.5
60.5 to 71.1
Manganese (Mn), % 0 to 1.0
0.5 to 2.5
Molybdenum (Mo), % 0
0.35 to 0.65
Nickel (Ni), % 0 to 0.5
8.0 to 10
Niobium (Nb), % 0
0.75 to 1.2
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.75
0 to 0.15
Tungsten (W), % 0
1.3 to 1.8
Vanadium (V), % 0
0.1 to 0.3