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AWS E240 vs. ASTM A387 Grade 2 Steel

Both AWS E240 and ASTM A387 grade 2 steel are iron alloys. They have 66% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is AWS E240 and the bottom bar is ASTM A387 grade 2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
25
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 770
470 to 550

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Melting Completion (Liquidus), °C 1390
1470
Melting Onset (Solidus), °C 1350
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 15
13

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.6
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.0
1.6
Embodied Energy, MJ/kg 42
20
Embodied Water, L/kg 160
50

Common Calculations

PREN (Pitting Resistance) 22
2.4
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
16 to 20
Strength to Weight: Bending, points 24
17 to 19
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 19
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.060
0.050 to 0.21
Chromium (Cr), % 17 to 19
0.5 to 0.8
Copper (Cu), % 0 to 0.75
0
Iron (Fe), % 58.6 to 68.4
97.1 to 98.3
Manganese (Mn), % 10.5 to 13.5
0.55 to 0.8
Molybdenum (Mo), % 0 to 0.75
0.45 to 0.6
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0.1 to 0.3
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