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SAE-AISI 1021 Steel vs. S38100 Stainless Steel

Both SAE-AISI 1021 steel and S38100 stainless steel are iron alloys. They have 62% 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 SAE-AISI 1021 steel and the bottom bar is S38100 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 130 to 150
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
45
Fatigue Strength, MPa 190 to 300
210
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 310 to 320
400
Tensile Strength: Ultimate (UTS), MPa 480 to 530
580
Tensile Strength: Yield (Proof), MPa 260 to 450
230

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Maximum Temperature: Mechanical, °C 400
970
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
15
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.6

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
3.8
Embodied Energy, MJ/kg 18
54
Embodied Water, L/kg 46
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
210
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
140
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17 to 19
21
Strength to Weight: Bending, points 17 to 18
20
Thermal Diffusivity, mm2/s 14
4.0
Thermal Shock Resistance, points 15 to 17
13

Alloy Composition

Carbon (C), % 0.18 to 0.23
0 to 0.080
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 98.8 to 99.22
57.9 to 64
Manganese (Mn), % 0.6 to 0.9
0 to 2.0
Nickel (Ni), % 0
17.5 to 18.5
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0
1.5 to 2.5
Sulfur (S), % 0 to 0.050
0 to 0.030