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AWS E409Nb vs. ASTM A387 Grade 5 Steel

Both AWS E409Nb and ASTM A387 grade 5 steel are iron alloys. They have a moderately high 91% 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 ASTM A387 grade 5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
20 to 21
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 500
500 to 600
Tensile Strength: Yield (Proof), MPa 380
230 to 350

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
40
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
8.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 13
4.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.7
Embodied Energy, MJ/kg 42
23
Embodied Water, L/kg 100
69

Common Calculations

PREN (Pitting Resistance) 14
6.8
Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
83 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 380
140 to 320
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
18 to 21
Strength to Weight: Bending, points 18
18 to 20
Thermal Diffusivity, mm2/s 6.8
11
Thermal Shock Resistance, points 14
14 to 17

Alloy Composition

Carbon (C), % 0 to 0.12
0 to 0.15
Chromium (Cr), % 11 to 14
4.0 to 6.0
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 80.2 to 88.5
92.1 to 95.3
Manganese (Mn), % 0 to 1.0
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.75
0.45 to 0.65
Nickel (Ni), % 0 to 0.6
0
Niobium (Nb), % 0.5 to 1.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025