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AISI 321 Stainless Steel vs. EN 1.4000 Stainless Steel

Both AISI 321 stainless steel and EN 1.4000 stainless steel are iron alloys. They have 84% of their average alloy composition in common.

For each property being compared, the top bar is AISI 321 stainless steel and the bottom bar is EN 1.4000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 210
180
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34 to 50
22
Fatigue Strength, MPa 220 to 270
170
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 420 to 460
320
Tensile Strength: Ultimate (UTS), MPa 590 to 690
500
Tensile Strength: Yield (Proof), MPa 220 to 350
260

Thermal Properties

Latent Heat of Fusion, J/g 290
280
Maximum Temperature: Corrosion, °C 480
390
Maximum Temperature: Mechanical, °C 870
760
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
30
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 16
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.2
1.9
Embodied Energy, MJ/kg 45
27
Embodied Water, L/kg 140
100

Common Calculations

PREN (Pitting Resistance) 19
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190 to 230
91
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 310
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
18
Strength to Weight: Bending, points 20 to 22
18
Thermal Diffusivity, mm2/s 4.1
8.1
Thermal Shock Resistance, points 13 to 15
18

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.080
Chromium (Cr), % 17 to 19
12 to 14
Iron (Fe), % 65.3 to 74
83.9 to 88
Manganese (Mn), % 0 to 2.0
0 to 1.0
Nickel (Ni), % 9.0 to 12
0
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0 to 0.7
0