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EN 1.4122 Stainless Steel vs. EN 1.1121 Steel

Both EN 1.4122 stainless steel and EN 1.1121 steel are iron alloys. They have 81% 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 1.1121 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14
28
Fatigue Strength, MPa 260 to 360
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 480 to 520
260
Tensile Strength: Ultimate (UTS), MPa 790 to 850
400
Tensile Strength: Yield (Proof), MPa 450 to 630
210

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
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
53
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.4
1.4
Embodied Energy, MJ/kg 33
18
Embodied Water, L/kg 120
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
93
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 31
14
Strength to Weight: Bending, points 25 to 26
15
Thermal Diffusivity, mm2/s 4.0
14
Thermal Shock Resistance, points 28 to 30
13

Alloy Composition

Carbon (C), % 0.33 to 0.45
0.070 to 0.13
Chromium (Cr), % 15.5 to 17.5
0
Iron (Fe), % 77.2 to 83.4
98.8 to 99.63
Manganese (Mn), % 0 to 1.5
0.3 to 0.6
Molybdenum (Mo), % 0.8 to 1.3
0
Nickel (Ni), % 0 to 1.0
0
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