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AWS E309 vs. AWS E209

Both AWS E309 and AWS E209 are iron alloys. Both are furnished in the as-welded condition. They have a moderately high 94% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS E309 and the bottom bar is AWS E209.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34
17
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 620
770

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1410
1420
Melting Onset (Solidus), °C 1370
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 14
14

Otherwise Unclassified Properties

Base Metal Price, % relative 20
21
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.7
4.4
Embodied Energy, MJ/kg 52
63
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 25
33
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
28
Strength to Weight: Bending, points 21
24
Thermal Shock Resistance, points 16
19

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.060
Chromium (Cr), % 22 to 25
20.5 to 24
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 55.8 to 65.5
51.5 to 64.3
Manganese (Mn), % 0.5 to 2.5
4.0 to 7.0
Molybdenum (Mo), % 0 to 0.75
1.5 to 3.0
Nickel (Ni), % 12 to 14
9.5 to 12
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3