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EN 1.4911 Stainless Steel vs. AISI 321 Stainless Steel

Both EN 1.4911 stainless steel and AISI 321 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 32 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 EN 1.4911 stainless steel and the bottom bar is AISI 321 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11
34 to 50
Fatigue Strength, MPa 530
220 to 270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 640
420 to 460
Tensile Strength: Ultimate (UTS), MPa 1070
590 to 690
Tensile Strength: Yield (Proof), MPa 970
220 to 350

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 430
480
Maximum Temperature: Mechanical, °C 700
870
Melting Completion (Liquidus), °C 1450
1430
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 20
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 20
16
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.4
3.2
Embodied Energy, MJ/kg 49
45
Embodied Water, L/kg 130
140

Common Calculations

PREN (Pitting Resistance) 14
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
190 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 2410
130 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 38
21 to 25
Strength to Weight: Bending, points 30
20 to 22
Thermal Diffusivity, mm2/s 5.4
4.1
Thermal Shock Resistance, points 37
13 to 15

Alloy Composition

Boron (B), % 0.0050 to 0.015
0
Carbon (C), % 0.050 to 0.12
0 to 0.080
Chromium (Cr), % 9.8 to 11.2
17 to 19
Cobalt (Co), % 5.0 to 7.0
0
Iron (Fe), % 75.7 to 83.8
65.3 to 74
Manganese (Mn), % 0.3 to 1.3
0 to 2.0
Molybdenum (Mo), % 0.5 to 1.0
0
Nickel (Ni), % 0.2 to 1.2
9.0 to 12
Niobium (Nb), % 0.2 to 0.5
0
Nitrogen (N), % 0 to 0.035
0 to 0.1
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0.1 to 0.8
0 to 0.75
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.7
Tungsten (W), % 0 to 0.7
0
Vanadium (V), % 0.1 to 0.4
0