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SAE-AISI 1021 Steel vs. ASTM Grade LCB Steel

Both SAE-AISI 1021 steel and ASTM grade LCB steel are iron alloys. Their average alloy composition is basically identical. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1021 steel and the bottom bar is ASTM grade LCB steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 27
27
Fatigue Strength, MPa 190 to 300
200
Poisson's Ratio 0.29
0.29
Reduction in Area, % 46 to 54
40
Shear Modulus, GPa 73
72
Tensile Strength: Ultimate (UTS), MPa 480 to 530
540
Tensile Strength: Yield (Proof), MPa 260 to 450
270

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
400
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
51
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.4
Embodied Energy, MJ/kg 18
18
Embodied Water, L/kg 46
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
120
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
200
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 19
19
Strength to Weight: Bending, points 17 to 18
19
Thermal Diffusivity, mm2/s 14
14
Thermal Shock Resistance, points 15 to 17
17

Alloy Composition


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Carbon (C), % 0.18 to 0.23
0 to 0.3
Iron (Fe), % 98.8 to 99.22
97 to 100
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 0.6
Sulfur (S), % 0 to 0.050
0 to 0.045
Residuals, % 0
0 to 1.0