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SAE-AISI 1021 Steel vs. S35045 Stainless Steel

Both SAE-AISI 1021 steel and S35045 stainless steel are iron alloys. They have a modest 37% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 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 S35045 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 27
39
Fatigue Strength, MPa 190 to 300
170
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
78
Shear Strength, MPa 310 to 320
370
Tensile Strength: Ultimate (UTS), MPa 480 to 530
540
Tensile Strength: Yield (Proof), MPa 260 to 450
190

Thermal Properties

Latent Heat of Fusion, J/g 250
310
Maximum Temperature: Mechanical, °C 400
1100
Melting Completion (Liquidus), °C 1460
1390
Melting Onset (Solidus), °C 1420
1340
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 52
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
34
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 1.4
5.8
Embodied Energy, MJ/kg 18
83
Embodied Water, L/kg 46
230

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 84 to 110
170
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 530
94
Stiffness to Weight: Axial, points 13
14
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
3.2
Thermal Shock Resistance, points 15 to 17
12

Alloy Composition

Aluminum (Al), % 0
0.15 to 0.6
Carbon (C), % 0.18 to 0.23
0.060 to 0.1
Chromium (Cr), % 0
25 to 29
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 98.8 to 99.22
29.4 to 42.6
Manganese (Mn), % 0.6 to 0.9
0 to 1.5
Nickel (Ni), % 0
32 to 37
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.015
Titanium (Ti), % 0
0.15 to 0.6