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AWS E2209 vs. ASTM A387 Grade 12 Steel

Both AWS E2209 and ASTM A387 grade 12 steel are iron alloys. They have 65% of their average alloy composition in common. There are 25 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 E2209 and the bottom bar is ASTM A387 grade 12 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
25
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Tensile Strength: Ultimate (UTS), MPa 770
470 to 520

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
44
Thermal Expansion, µm/m-K 14
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 20
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.0
1.6
Embodied Energy, MJ/kg 55
21
Embodied Water, L/kg 170
51

Common Calculations

PREN (Pitting Resistance) 35
2.7
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27
16 to 18
Strength to Weight: Bending, points 24
17 to 18
Thermal Diffusivity, mm2/s 4.3
12
Thermal Shock Resistance, points 20
14 to 15

Alloy Composition

Carbon (C), % 0 to 0.040
0.050 to 0.17
Chromium (Cr), % 21.5 to 23.5
0.8 to 1.2
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 58.4 to 66.9
97 to 98.2
Manganese (Mn), % 0.5 to 2.0
0.4 to 0.65
Molybdenum (Mo), % 2.5 to 3.5
0.45 to 0.6
Nickel (Ni), % 8.5 to 10.5
0
Nitrogen (N), % 0.080 to 0.2
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0.15 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.025