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S21900 Stainless Steel vs. AISI 205 Stainless Steel

Both S21900 stainless steel and AISI 205 stainless steel are iron alloys. They have a moderately high 92% 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 S21900 stainless steel and the bottom bar is AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220
210 to 440
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
11 to 51
Fatigue Strength, MPa 380
410 to 640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Shear Strength, MPa 510
560 to 850
Tensile Strength: Ultimate (UTS), MPa 710
800 to 1430
Tensile Strength: Yield (Proof), MPa 390
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 980
880
Melting Completion (Liquidus), °C 1400
1380
Melting Onset (Solidus), °C 1350
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
18

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.7
7.6
Embodied Carbon, kg CO2/kg material 3.0
2.6
Embodied Energy, MJ/kg 43
37
Embodied Water, L/kg 160
150

Common Calculations

PREN (Pitting Resistance) 25
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 300
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 380
510 to 3060
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 26
29 to 52
Strength to Weight: Bending, points 23
25 to 37
Thermal Shock Resistance, points 15
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.080
0.12 to 0.25
Chromium (Cr), % 19 to 21.5
16.5 to 18.5
Iron (Fe), % 59.4 to 67.4
62.6 to 68.1
Manganese (Mn), % 8.0 to 10
14 to 15.5
Nickel (Ni), % 5.5 to 7.5
1.0 to 1.7
Nitrogen (N), % 0.15 to 0.4
0.32 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030