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AWS E409Nb vs. ACI-ASTM CA40 Steel

Both AWS E409Nb and ACI-ASTM CA40 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AWS E409Nb and the bottom bar is ACI-ASTM CA40 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
10
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 500
910
Tensile Strength: Yield (Proof), MPa 380
860

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1460
1440
Melting Onset (Solidus), °C 1410
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
25
Thermal Expansion, µm/m-K 14
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.9
2.0
Embodied Energy, MJ/kg 42
28
Embodied Water, L/kg 100
100

Common Calculations

PREN (Pitting Resistance) 14
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
89
Resilience: Unit (Modulus of Resilience), kJ/m3 380
1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
33
Strength to Weight: Bending, points 18
27
Thermal Diffusivity, mm2/s 6.8
6.7
Thermal Shock Resistance, points 14
33

Alloy Composition

Carbon (C), % 0 to 0.12
0.2 to 0.4
Chromium (Cr), % 11 to 14
11.5 to 14
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 80.2 to 88.5
81.5 to 88.3
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.75
0 to 0.5
Nickel (Ni), % 0 to 0.6
0 to 1.0
Niobium (Nb), % 0.5 to 1.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040