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AWS E240 vs. SAE-AISI P20 Steel

Both AWS E240 and SAE-AISI P20 steel are iron alloys. They have 66% 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 P20 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
73
Tensile Strength: Ultimate (UTS), MPa 770
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 290
260
Melting Completion (Liquidus), °C 1390
1460
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
12

Otherwise Unclassified Properties

Base Metal Price, % relative 14
2.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.0
1.6
Embodied Energy, MJ/kg 42
21
Embodied Water, L/kg 160
52

Common Calculations

PREN (Pitting Resistance) 22
2.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
19 to 37
Strength to Weight: Bending, points 24
19 to 29
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 19
18 to 35

Alloy Composition

Carbon (C), % 0 to 0.060
0.28 to 0.4
Chromium (Cr), % 17 to 19
0.4 to 2.0
Copper (Cu), % 0 to 0.75
0 to 0.25
Iron (Fe), % 58.6 to 68.4
95.2 to 98.5
Manganese (Mn), % 10.5 to 13.5
0.35 to 0.71
Molybdenum (Mo), % 0 to 0.75
0.3 to 0.55
Nickel (Ni), % 4.0 to 6.0
0
Nitrogen (N), % 0.1 to 0.3
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.030