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AISI 440B Stainless Steel vs. EN 1.1221 Steel

Both AISI 440B stainless steel and EN 1.1221 steel are iron alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 440B stainless steel and the bottom bar is EN 1.1221 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 3.0 to 18
10 to 21
Fatigue Strength, MPa 260 to 850
240 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 460 to 1110
450 to 520
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
730 to 870
Tensile Strength: Yield (Proof), MPa 430 to 1860
390 to 550

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 870
400
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 23
48
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.5
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.9
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.2
1.5
Embodied Energy, MJ/kg 31
19
Embodied Water, L/kg 120
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
67 to 130
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 27 to 70
26 to 31
Strength to Weight: Bending, points 24 to 45
23 to 26
Thermal Diffusivity, mm2/s 6.1
13
Thermal Shock Resistance, points 27 to 70
23 to 28

Alloy Composition

Carbon (C), % 0.75 to 1.0
0.57 to 0.65
Chromium (Cr), % 16 to 18
0 to 0.4
Iron (Fe), % 78.2 to 83.3
97.1 to 98.8
Manganese (Mn), % 0 to 1.0
0.6 to 0.9
Molybdenum (Mo), % 0 to 0.75
0 to 0.1
Nickel (Ni), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035

Comparable Variants