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AWS E320 vs. SAE-AISI O7 Steel

Both AWS E320 and SAE-AISI O7 steel are iron alloys. They have a modest 40% of their average alloy composition in common, which, by itself, doesn't mean much. There are 20 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AWS E320 and the bottom bar is SAE-AISI O7 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 620
680 to 2110

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1410
1480
Melting Onset (Solidus), °C 1360
1430
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 38
6.0
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 6.5
2.3
Embodied Energy, MJ/kg 91
33
Embodied Water, L/kg 220
52

Common Calculations

PREN (Pitting Resistance) 28
3.6
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
24 to 74
Strength to Weight: Bending, points 20
22 to 46
Thermal Shock Resistance, points 16
23 to 70

Alloy Composition

Carbon (C), % 0 to 0.070
1.1 to 1.3
Chromium (Cr), % 19 to 21
0.35 to 0.85
Copper (Cu), % 3.0 to 4.0
0 to 0.25
Iron (Fe), % 31.8 to 43.5
92.9 to 97.6
Manganese (Mn), % 0.5 to 2.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.3
Nickel (Ni), % 32 to 36
0 to 0.3
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.6
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
1.0 to 2.0
Vanadium (V), % 0
0 to 0.4