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AISI 321 Stainless Steel vs. AISI 301 Stainless Steel

Both AISI 321 stainless steel and AISI 301 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, 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 301 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
190 to 440
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34 to 50
7.4 to 46
Fatigue Strength, MPa 220 to 270
210 to 600
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Shear Strength, MPa 420 to 460
410 to 860
Tensile Strength: Ultimate (UTS), MPa 590 to 690
590 to 1460
Tensile Strength: Yield (Proof), MPa 220 to 350
230 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 480
410
Maximum Temperature: Mechanical, °C 870
840
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 17
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
2.7
Embodied Energy, MJ/kg 45
39
Embodied Water, L/kg 140
130

Common Calculations

PREN (Pitting Resistance) 19
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
99 to 300
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
130 to 2970
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
21 to 52
Strength to Weight: Bending, points 20 to 22
20 to 37
Thermal Diffusivity, mm2/s 4.1
4.2
Thermal Shock Resistance, points 13 to 15
12 to 31

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.15
Chromium (Cr), % 17 to 19
16 to 18
Iron (Fe), % 65.3 to 74
70.7 to 78
Manganese (Mn), % 0 to 2.0
0 to 2.0
Nickel (Ni), % 9.0 to 12
6.0 to 8.0
Nitrogen (N), % 0 to 0.1
0 to 0.1
Phosphorus (P), % 0 to 0.045
0 to 0.045
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