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SAE-AISI 1021 Steel vs. AWS E309

Both SAE-AISI 1021 steel and AWS E309 are iron alloys. They have 62% of their average alloy composition in common. There are 24 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 SAE-AISI 1021 steel and the bottom bar is AWS E309.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
34
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
78
Tensile Strength: Ultimate (UTS), MPa 480 to 530
620

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1460
1410
Melting Onset (Solidus), °C 1420
1370
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
15
Thermal Expansion, µm/m-K 12
14

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
20
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.7
Embodied Energy, MJ/kg 18
52
Embodied Water, L/kg 46
180

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 19
22
Strength to Weight: Bending, points 17 to 18
21
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 15 to 17
16

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.15
Chromium (Cr), % 0
22 to 25
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 98.8 to 99.22
55.8 to 65.5
Manganese (Mn), % 0.6 to 0.9
0.5 to 2.5
Molybdenum (Mo), % 0
0 to 0.75
Nickel (Ni), % 0
12 to 14
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030