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EN 1.4122 Stainless Steel vs. EN 1.1221 Steel

Both EN 1.4122 stainless steel and EN 1.1221 steel are iron alloys. They have 82% of their average alloy composition in common. There are 30 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 EN 1.4122 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, % 14
10 to 21
Fatigue Strength, MPa 260 to 360
240 to 340
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 480 to 520
450 to 520
Tensile Strength: Ultimate (UTS), MPa 790 to 850
730 to 870
Tensile Strength: Yield (Proof), MPa 450 to 630
390 to 550

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 870
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
2.1
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
1.5
Embodied Energy, MJ/kg 33
19
Embodied Water, L/kg 120
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
67 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
410 to 800
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 31
26 to 31
Strength to Weight: Bending, points 25 to 26
23 to 26
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 28 to 30
23 to 28

Alloy Composition

Carbon (C), % 0.33 to 0.45
0.57 to 0.65
Chromium (Cr), % 15.5 to 17.5
0 to 0.4
Iron (Fe), % 77.2 to 83.4
97.1 to 98.8
Manganese (Mn), % 0 to 1.5
0.6 to 0.9
Molybdenum (Mo), % 0.8 to 1.3
0 to 0.1
Nickel (Ni), % 0 to 1.0
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