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SAE-AISI 1021 Steel vs. SAE-AISI 4150 Steel

Both SAE-AISI 1021 steel and SAE-AISI 4150 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1021 steel and the bottom bar is SAE-AISI 4150 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
200 to 380
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17 to 27
12 to 20
Fatigue Strength, MPa 190 to 300
260 to 780
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 310 to 320
410 to 800
Tensile Strength: Ultimate (UTS), MPa 480 to 530
660 to 1310
Tensile Strength: Yield (Proof), MPa 260 to 450
380 to 1220

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 52
42
Thermal Expansion, µm/m-K 12
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
20
Embodied Water, L/kg 46
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
82 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
380 to 3930
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17 to 19
24 to 47
Strength to Weight: Bending, points 17 to 18
22 to 34
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 15 to 17
19 to 39

Alloy Composition

Carbon (C), % 0.18 to 0.23
0.48 to 0.53
Chromium (Cr), % 0
0.8 to 1.1
Iron (Fe), % 98.8 to 99.22
96.7 to 97.7
Manganese (Mn), % 0.6 to 0.9
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0 to 0.050
0 to 0.040

Comparable Variants