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AISI 431 Stainless Steel vs. EN 1.4021 Stainless Steel

Both AISI 431 stainless steel and EN 1.4021 stainless steel are iron alloys. They have a very high 95% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 431 stainless steel and the bottom bar is EN 1.4021 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 17
11 to 17
Fatigue Strength, MPa 430 to 610
240 to 380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 550 to 840
390 to 530
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
630 to 880
Tensile Strength: Yield (Proof), MPa 710 to 1040
390 to 670

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 400
390
Maximum Temperature: Mechanical, °C 850
760
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
30
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
7.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.2
1.9
Embodied Energy, MJ/kg 31
27
Embodied Water, L/kg 120
100

Common Calculations

PREN (Pitting Resistance) 16
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
88 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
400 to 1160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 50
23 to 31
Strength to Weight: Bending, points 27 to 36
21 to 26
Thermal Diffusivity, mm2/s 7.0
8.1
Thermal Shock Resistance, points 28 to 43
22 to 31

Alloy Composition

Carbon (C), % 0 to 0.2
0.16 to 0.25
Chromium (Cr), % 15 to 17
12 to 14
Iron (Fe), % 78.2 to 83.8
83.2 to 87.8
Manganese (Mn), % 0 to 1.0
0 to 1.5
Nickel (Ni), % 1.3 to 2.5
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015