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AWS E430 vs. AWS E309Nb

Both AWS E430 and AWS E309Nb are iron alloys. They have 78% of their average alloy composition in common.

For each property being compared, the top bar is AWS E430 and the bottom bar is AWS E309Nb.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
34
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 500
620

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1440
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 14
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.2
2.4

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
25
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
4.4
Embodied Energy, MJ/kg 31
64
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 18
25
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
22
Strength to Weight: Bending, points 18
21
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 13
16

Alloy Composition

Carbon (C), % 0 to 0.1
0 to 0.12
Chromium (Cr), % 15 to 18
22 to 25
Copper (Cu), % 0 to 0.75
0 to 0.75
Iron (Fe), % 77.8 to 85
54.8 to 64.8
Manganese (Mn), % 0 to 1.0
0.5 to 2.5
Molybdenum (Mo), % 0 to 0.75
0 to 0.75
Nickel (Ni), % 0 to 0.6
12 to 14
Niobium (Nb), % 0
0.7 to 1.0
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