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S82121 Stainless Steel vs. SAE-AISI 1046 Steel

Both S82121 stainless steel and SAE-AISI 1046 steel are iron alloys. They have 72% 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 S82121 stainless steel and the bottom bar is SAE-AISI 1046 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
190 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
14 to 17
Fatigue Strength, MPa 370
240 to 390
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
72
Shear Strength, MPa 470
410 to 450
Tensile Strength: Ultimate (UTS), MPa 730
660 to 740
Tensile Strength: Yield (Proof), MPa 510
370 to 610

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 1020
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
51
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
11
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
12

Otherwise Unclassified Properties

Base Metal Price, % relative 14
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
1.4
Embodied Energy, MJ/kg 40
18
Embodied Water, L/kg 150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
91 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 660
360 to 990
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
23 to 26
Strength to Weight: Bending, points 23
22 to 23
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 20
23 to 25

Alloy Composition

Carbon (C), % 0 to 0.035
0.43 to 0.5
Chromium (Cr), % 21 to 23
0
Copper (Cu), % 0.2 to 1.2
0
Iron (Fe), % 66.7 to 75.4
98.4 to 98.9
Manganese (Mn), % 1.0 to 2.5
0.7 to 1.0
Molybdenum (Mo), % 0.3 to 1.3
0
Nickel (Ni), % 2.0 to 4.0
0
Nitrogen (N), % 0.15 to 0.25
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.010
0 to 0.050