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SAE-AISI 1021 Steel vs. AISI 304L Stainless Steel

Both SAE-AISI 1021 steel and AISI 304L stainless steel are iron alloys. They have 70% of their average alloy composition in common. There are 31 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 SAE-AISI 1021 steel and the bottom bar is AISI 304L stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
160 to 350
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
6.7 to 46
Fatigue Strength, MPa 190 to 300
170 to 430
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
77
Shear Strength, MPa 310 to 320
370 to 680
Tensile Strength: Ultimate (UTS), MPa 480 to 530
540 to 1160
Tensile Strength: Yield (Proof), MPa 260 to 450
190 to 870

Thermal Properties

Latent Heat of Fusion, J/g 250
290
Maximum Temperature: Mechanical, °C 400
540
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
16
Thermal Expansion, µm/m-K 12
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.4
3.1
Embodied Energy, MJ/kg 18
44
Embodied Water, L/kg 46
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
71 to 240
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
92 to 1900
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 19
19 to 41
Strength to Weight: Bending, points 17 to 18
19 to 31
Thermal Diffusivity, mm2/s 14
4.2
Thermal Shock Resistance, points 15 to 17
12 to 25

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.030
Chromium (Cr), % 0
18 to 20
Iron (Fe), % 98.8 to 99.22
65 to 74
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Nickel (Ni), % 0
8.0 to 12
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 0.75
Sulfur (S), % 0 to 0.050
0 to 0.030

Comparable Variants