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S82121 Stainless Steel vs. S20910 Stainless Steel

Both S82121 stainless steel and S20910 stainless steel are iron alloys. They have 85% 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 S20910 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
230 to 290
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 28
14 to 39
Fatigue Strength, MPa 370
310 to 460
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 78
79
Shear Strength, MPa 470
500 to 570
Tensile Strength: Ultimate (UTS), MPa 730
780 to 940
Tensile Strength: Yield (Proof), MPa 510
430 to 810

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 430
460
Maximum Temperature: Mechanical, °C 1020
1080
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1380
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
13
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 14
22
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.8
4.8
Embodied Energy, MJ/kg 40
68
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 28
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
120 to 260
Resilience: Unit (Modulus of Resilience), kJ/m3 660
460 to 1640
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
28 to 33
Strength to Weight: Bending, points 23
24 to 27
Thermal Diffusivity, mm2/s 4.0
3.6
Thermal Shock Resistance, points 20
17 to 21

Alloy Composition

Carbon (C), % 0 to 0.035
0 to 0.060
Chromium (Cr), % 21 to 23
20.5 to 23.5
Copper (Cu), % 0.2 to 1.2
0
Iron (Fe), % 66.7 to 75.4
52.1 to 62.1
Manganese (Mn), % 1.0 to 2.5
4.0 to 6.0
Molybdenum (Mo), % 0.3 to 1.3
1.5 to 3.0
Nickel (Ni), % 2.0 to 4.0
11.5 to 13.5
Niobium (Nb), % 0
0.1 to 0.3
Nitrogen (N), % 0.15 to 0.25
0.2 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.010
0 to 0.030
Vanadium (V), % 0
0.1 to 0.3