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S82121 Stainless Steel vs. SAE-AISI 1038 Steel

Both S82121 stainless steel and SAE-AISI 1038 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 1038 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
170 to 180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
14 to 20
Fatigue Strength, MPa 370
220 to 350
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 470
370 to 390
Tensile Strength: Ultimate (UTS), MPa 730
590 to 640
Tensile Strength: Yield (Proof), MPa 510
320 to 540

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
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 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
83 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 660
270 to 790
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
21 to 23
Strength to Weight: Bending, points 23
20 to 21
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 20
19 to 20

Alloy Composition

Carbon (C), % 0 to 0.035
0.35 to 0.42
Chromium (Cr), % 21 to 23
0
Copper (Cu), % 0.2 to 1.2
0
Iron (Fe), % 66.7 to 75.4
98.6 to 99.05
Manganese (Mn), % 1.0 to 2.5
0.6 to 0.9
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