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AWS E240 vs. SAE-AISI A2 Steel

Both AWS E240 and SAE-AISI A2 steel are iron alloys. They have 70% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AWS E240 and the bottom bar is SAE-AISI A2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
74
Tensile Strength: Ultimate (UTS), MPa 770
710 to 2040

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1390
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
38
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 14
5.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.7
Embodied Energy, MJ/kg 42
38
Embodied Water, L/kg 160
73

Common Calculations

PREN (Pitting Resistance) 22
8.9
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
25 to 73
Strength to Weight: Bending, points 24
23 to 46
Thermal Diffusivity, mm2/s 3.9
10
Thermal Shock Resistance, points 19
25 to 71

Alloy Composition

Carbon (C), % 0 to 0.060
1.0 to 1.1
Chromium (Cr), % 17 to 19
4.8 to 5.5
Copper (Cu), % 0 to 0.75
0 to 0.25
Iron (Fe), % 58.6 to 68.4
89.4 to 93.3
Manganese (Mn), % 10.5 to 13.5
0 to 1.0
Molybdenum (Mo), % 0 to 0.75
0.9 to 1.4
Nickel (Ni), % 4.0 to 6.0
0 to 0.3
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.15 to 0.5