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S82121 Stainless Steel vs. SAE-AISI 1070 Steel

Both S82121 stainless steel and SAE-AISI 1070 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 1070 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
190 to 230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
10 to 13
Fatigue Strength, MPa 370
270 to 350
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 78
72
Shear Strength, MPa 470
380 to 460
Tensile Strength: Ultimate (UTS), MPa 730
640 to 760
Tensile Strength: Yield (Proof), MPa 510
420 to 560

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
50
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
10
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
19
Embodied Water, L/kg 150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
59 to 86
Resilience: Unit (Modulus of Resilience), kJ/m3 660
470 to 850
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 26
23 to 27
Strength to Weight: Bending, points 23
21 to 24
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 20
21 to 25

Alloy Composition

Carbon (C), % 0 to 0.035
0.65 to 0.75
Chromium (Cr), % 21 to 23
0
Copper (Cu), % 0.2 to 1.2
0
Iron (Fe), % 66.7 to 75.4
98.3 to 98.8
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