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AISI 321 Stainless Steel vs. EN 1.8831 Steel

Both AISI 321 stainless steel and EN 1.8831 steel are iron alloys. They have 71% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is EN 1.8831 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
19
Fatigue Strength, MPa 220 to 270
330
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 420 to 460
390
Tensile Strength: Ultimate (UTS), MPa 590 to 690
630
Tensile Strength: Yield (Proof), MPa 220 to 350
480

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 870
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
49
Thermal Expansion, µm/m-K 17
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 16
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.2
1.6
Embodied Energy, MJ/kg 45
21
Embodied Water, L/kg 140
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
620
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
22
Strength to Weight: Bending, points 20 to 22
21
Thermal Diffusivity, mm2/s 4.1
13
Thermal Shock Resistance, points 13 to 15
18

Alloy Composition

Aluminum (Al), % 0
0.020 to 0.040
Carbon (C), % 0 to 0.080
0 to 0.16
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 65.3 to 74
96.6 to 99.98
Manganese (Mn), % 0 to 2.0
0 to 1.7
Molybdenum (Mo), % 0
0 to 0.2
Nickel (Ni), % 9.0 to 12
0 to 0.5
Niobium (Nb), % 0
0 to 0.050
Nitrogen (N), % 0 to 0.1
0 to 0.020
Phosphorus (P), % 0 to 0.045
0 to 0.020
Silicon (Si), % 0 to 0.75
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.0050
Titanium (Ti), % 0 to 0.7
0 to 0.050
Vanadium (V), % 0
0 to 0.1