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AWS E209 vs. AWS E320LR

Both AWS E209 and AWS E320LR are iron alloys. Both are furnished in the as-welded condition. They have 73% of their average alloy composition in common.

For each property being compared, the top bar is AWS E209 and the bottom bar is AWS E320LR.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 770
580

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Melting Completion (Liquidus), °C 1420
1410
Melting Onset (Solidus), °C 1370
1360
Specific Heat Capacity, J/kg-K 480
460
Thermal Expansion, µm/m-K 14
14

Otherwise Unclassified Properties

Base Metal Price, % relative 21
36
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 4.4
6.2
Embodied Energy, MJ/kg 63
87
Embodied Water, L/kg 180
220

Common Calculations

PREN (Pitting Resistance) 33
28
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
20
Strength to Weight: Bending, points 24
19
Thermal Shock Resistance, points 19
15

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 20.5 to 24
19 to 21
Copper (Cu), % 0 to 0.75
3.0 to 4.0
Iron (Fe), % 51.5 to 64.3
32.7 to 42.5
Manganese (Mn), % 4.0 to 7.0
1.5 to 2.5
Molybdenum (Mo), % 1.5 to 3.0
2.0 to 3.0
Nickel (Ni), % 9.5 to 12
32 to 36
Niobium (Nb), % 0
0 to 0.4
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 1.0
0 to 0.3
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.1 to 0.3
0