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AWS E410NiMo vs. AWS E409Nb

Both AWS E410NiMo and AWS E409Nb are iron alloys. Both are furnished in the post-weld heat treated (PWHT) condition. They have a very high 96% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AWS E410NiMo and the bottom bar is AWS E409Nb.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
23
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 850
500

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 24
25
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 10
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.4
2.9
Embodied Energy, MJ/kg 34
42
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 14
14
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 30
18
Strength to Weight: Bending, points 26
18
Thermal Diffusivity, mm2/s 6.5
6.8
Thermal Shock Resistance, points 23
14

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.12
Chromium (Cr), % 11 to 12.5
11 to 14
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 79 to 84.6
80.2 to 88.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.4 to 0.7
0 to 0.75
Nickel (Ni), % 4.0 to 5.0
0 to 0.6
Niobium (Nb), % 0
0.5 to 1.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 0.9
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030