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AISI 321 Stainless Steel vs. AISI 205 Stainless Steel

Both AISI 321 stainless steel and AISI 205 stainless steel are iron alloys. They have 86% of their average alloy composition in common. There are 29 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 321 stainless steel and the bottom bar is AISI 205 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
210 to 440
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34 to 50
11 to 51
Fatigue Strength, MPa 220 to 270
410 to 640
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 420 to 460
560 to 850
Tensile Strength: Ultimate (UTS), MPa 590 to 690
800 to 1430
Tensile Strength: Yield (Proof), MPa 220 to 350
450 to 1100

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 480
410
Maximum Temperature: Mechanical, °C 870
880
Melting Completion (Liquidus), °C 1430
1380
Melting Onset (Solidus), °C 1400
1340
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
18

Otherwise Unclassified Properties

Base Metal Price, % relative 16
11
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 3.2
2.6
Embodied Energy, MJ/kg 45
37
Embodied Water, L/kg 140
150

Common Calculations

PREN (Pitting Resistance) 19
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
150 to 430
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
510 to 3060
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 21 to 25
29 to 52
Strength to Weight: Bending, points 20 to 22
25 to 37
Thermal Shock Resistance, points 13 to 15
16 to 29

Alloy Composition

Carbon (C), % 0 to 0.080
0.12 to 0.25
Chromium (Cr), % 17 to 19
16.5 to 18.5
Iron (Fe), % 65.3 to 74
62.6 to 68.1
Manganese (Mn), % 0 to 2.0
14 to 15.5
Nickel (Ni), % 9.0 to 12
1.0 to 1.7
Nitrogen (N), % 0 to 0.1
0.32 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.060
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0 to 0.7
0