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AWS E308H vs. AWS E349

Both AWS E308H and AWS E349 are iron alloys. Both are furnished in the as-welded condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is AWS E308H and the bottom bar is AWS E349.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
29
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 620
770

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Melting Completion (Liquidus), °C 1420
1470
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
25
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.2
4.9
Embodied Energy, MJ/kg 46
72
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 21
24
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 22
27
Strength to Weight: Bending, points 21
24
Thermal Diffusivity, mm2/s 4.2
4.1
Thermal Shock Resistance, points 16
20

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.13
Chromium (Cr), % 18 to 21
18 to 21
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 62.9 to 72.5
60.5 to 71.1
Manganese (Mn), % 0.5 to 2.5
0.5 to 2.5
Molybdenum (Mo), % 0 to 0.75
0.35 to 0.65
Nickel (Ni), % 9.0 to 11
8.0 to 10
Niobium (Nb), % 0
0.75 to 1.2
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
Titanium (Ti), % 0
0 to 0.15
Tungsten (W), % 0
1.3 to 1.8
Vanadium (V), % 0
0.1 to 0.3