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AWS E308H vs. Nickel 686

AWS E308H belongs to the iron alloys classification, while nickel 686 belongs to the nickel alloys. They have a modest 33% of their average alloy composition in common, which, by itself, doesn't mean much. There are 24 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 AWS E308H and the bottom bar is nickel 686.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
220
Elongation at Break, % 40
51
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 620
780

Thermal Properties

Latent Heat of Fusion, J/g 290
320
Melting Completion (Liquidus), °C 1420
1380
Melting Onset (Solidus), °C 1380
1340
Specific Heat Capacity, J/kg-K 480
420
Thermal Conductivity, W/m-K 16
9.8
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
1.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
1.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
70
Density, g/cm3 7.8
9.0
Embodied Carbon, kg CO2/kg material 3.2
12
Embodied Energy, MJ/kg 46
170
Embodied Water, L/kg 150
300

Common Calculations

Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 22
24
Strength to Weight: Bending, points 21
21
Thermal Diffusivity, mm2/s 4.2
2.6
Thermal Shock Resistance, points 16
21

Alloy Composition

Carbon (C), % 0.040 to 0.080
0 to 0.010
Chromium (Cr), % 18 to 21
19 to 23
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 62.9 to 72.5
0 to 5.0
Manganese (Mn), % 0.5 to 2.5
0 to 0.75
Molybdenum (Mo), % 0 to 0.75
15 to 17
Nickel (Ni), % 9.0 to 11
49.5 to 63
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.080
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0.020 to 0.25
Tungsten (W), % 0
3.0 to 4.4