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EN 1.4911 Stainless Steel vs. EN 1.1121 Steel

Both EN 1.4911 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 1.4911 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, % 11
28
Fatigue Strength, MPa 530
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
73
Shear Strength, MPa 640
260
Tensile Strength: Ultimate (UTS), MPa 1070
400
Tensile Strength: Yield (Proof), MPa 970
210

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 700
400
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 20
53
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 20
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.4
1.4
Embodied Energy, MJ/kg 49
18
Embodied Water, L/kg 130
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
93
Resilience: Unit (Modulus of Resilience), kJ/m3 2410
110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 38
14
Strength to Weight: Bending, points 30
15
Thermal Diffusivity, mm2/s 5.4
14
Thermal Shock Resistance, points 37
13

Alloy Composition

Boron (B), % 0.0050 to 0.015
0
Carbon (C), % 0.050 to 0.12
0.070 to 0.13
Chromium (Cr), % 9.8 to 11.2
0
Cobalt (Co), % 5.0 to 7.0
0
Iron (Fe), % 75.7 to 83.8
98.8 to 99.63
Manganese (Mn), % 0.3 to 1.3
0.3 to 0.6
Molybdenum (Mo), % 0.5 to 1.0
0
Nickel (Ni), % 0.2 to 1.2
0
Niobium (Nb), % 0.2 to 0.5
0
Nitrogen (N), % 0 to 0.035
0
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0.1 to 0.8
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035
Tungsten (W), % 0 to 0.7
0
Vanadium (V), % 0.1 to 0.4
0