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S81921 Stainless Steel vs. AISI 205 Stainless Steel

Both S81921 stainless steel and AISI 205 stainless steel are iron alloys. They have 88% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is S81921 stainless steel and the bottom bar is AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260
210 to 440
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 29
11 to 51
Fatigue Strength, MPa 370
410 to 640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Shear Strength, MPa 460
560 to 850
Tensile Strength: Ultimate (UTS), MPa 710
800 to 1430
Tensile Strength: Yield (Proof), MPa 500
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 430
410
Maximum Temperature: Mechanical, °C 990
880
Melting Completion (Liquidus), °C 1430
1380
Melting Onset (Solidus), °C 1390
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
18

Otherwise Unclassified Properties

Base Metal Price, % relative 14
11
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 2.9
2.6
Embodied Energy, MJ/kg 41
37
Embodied Water, L/kg 150
150

Common Calculations

PREN (Pitting Resistance) 28
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 630
510 to 3060
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 25
29 to 52
Strength to Weight: Bending, points 23
25 to 37
Thermal Shock Resistance, points 20
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.030
0.12 to 0.25
Chromium (Cr), % 19 to 22
16.5 to 18.5
Iron (Fe), % 66.7 to 75.9
62.6 to 68.1
Manganese (Mn), % 2.0 to 4.0
14 to 15.5
Molybdenum (Mo), % 1.0 to 2.0
0
Nickel (Ni), % 2.0 to 4.0
1.0 to 1.7
Nitrogen (N), % 0.14 to 0.2
0.32 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030