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AISI 309 Stainless Steel vs. SAE-AISI 1021 Steel

Both AISI 309 stainless steel and SAE-AISI 1021 steel are iron alloys. They have 63% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 309 stainless steel and the bottom bar is SAE-AISI 1021 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
130 to 150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 47
17 to 27
Fatigue Strength, MPa 250 to 280
190 to 300
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 420 to 470
310 to 320
Tensile Strength: Ultimate (UTS), MPa 600 to 710
480 to 530
Tensile Strength: Yield (Proof), MPa 260 to 350
260 to 450

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
52
Thermal Expansion, µm/m-K 15
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 19
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 3.6
1.4
Embodied Energy, MJ/kg 51
18
Embodied Water, L/kg 170
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
84 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
180 to 530
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
17 to 19
Strength to Weight: Bending, points 20 to 23
17 to 18
Thermal Diffusivity, mm2/s 4.3
14
Thermal Shock Resistance, points 14 to 16
15 to 17

Alloy Composition

Carbon (C), % 0 to 0.2
0.18 to 0.23
Chromium (Cr), % 22 to 24
0
Iron (Fe), % 58 to 66
98.8 to 99.22
Manganese (Mn), % 0 to 2.0
0.6 to 0.9
Nickel (Ni), % 12 to 15
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0
Sulfur (S), % 0 to 0.030
0 to 0.050

Comparable Variants