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AISI 316 Stainless Steel vs. S82121 Stainless Steel

Both AISI 316 stainless steel and S82121 stainless steel are iron alloys. They have 89% of their average alloy composition in common. There are 33 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 AISI 316 stainless steel and the bottom bar is S82121 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 360
250
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 8.0 to 55
28
Fatigue Strength, MPa 210 to 430
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
78
Shear Strength, MPa 350 to 690
470
Tensile Strength: Ultimate (UTS), MPa 520 to 1180
730
Tensile Strength: Yield (Proof), MPa 230 to 850
510

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 410
430
Maximum Temperature: Mechanical, °C 590
1020
Melting Completion (Liquidus), °C 1400
1430
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
15
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 19
14
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 3.9
2.8
Embodied Energy, MJ/kg 53
40
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 26
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 85 to 260
180
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 1820
660
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18 to 41
26
Strength to Weight: Bending, points 18 to 31
23
Thermal Diffusivity, mm2/s 4.1
4.0
Thermal Shock Resistance, points 11 to 26
20

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.035
Chromium (Cr), % 16 to 18
21 to 23
Copper (Cu), % 0
0.2 to 1.2
Iron (Fe), % 62 to 72
66.7 to 75.4
Manganese (Mn), % 0 to 2.0
1.0 to 2.5
Molybdenum (Mo), % 2.0 to 3.0
0.3 to 1.3
Nickel (Ni), % 10 to 14
2.0 to 4.0
Nitrogen (N), % 0 to 0.1
0.15 to 0.25
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010