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AWS E320 vs. SAE-AISI P21 Steel

Both AWS E320 and SAE-AISI P21 steel are iron alloys. They have 43% of their average alloy composition in common. There are 19 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 E320 and the bottom bar is SAE-AISI P21 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
1130

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1360
1410
Specific Heat Capacity, J/kg-K 460
470
Thermal Expansion, µm/m-K 14
12

Otherwise Unclassified Properties

Base Metal Price, % relative 38
6.5
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 6.5
2.3
Embodied Energy, MJ/kg 91
32
Embodied Water, L/kg 220
62

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
40
Strength to Weight: Bending, points 20
31
Thermal Shock Resistance, points 16
37

Alloy Composition

Carbon (C), % 0 to 0.070
0.18 to 0.22
Chromium (Cr), % 19 to 21
0 to 0.5
Cobalt (Co), % 0
1.1 to 1.3
Copper (Cu), % 3.0 to 4.0
0 to 0.25
Iron (Fe), % 31.8 to 43.5
92.1 to 94.2
Manganese (Mn), % 0.5 to 2.5
0.35 to 0.72
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 32 to 36
3.9 to 4.3
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.6
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
0.15 to 0.25