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EN 1.4550 Stainless Steel vs. EN 1.1191 Steel

Both EN 1.4550 stainless steel and EN 1.1191 steel are iron alloys. They have 71% 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 EN 1.4550 stainless steel and the bottom bar is EN 1.1191 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 42
16 to 17
Fatigue Strength, MPa 210
210 to 290
Impact Strength: V-Notched Charpy, J 90
16 to 29
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
72
Shear Strength, MPa 430
380 to 430
Tensile Strength: Ultimate (UTS), MPa 620
630 to 700
Tensile Strength: Yield (Proof), MPa 230
310 to 440

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 940
400
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 16
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 18
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
1.4
Embodied Energy, MJ/kg 51
19
Embodied Water, L/kg 140
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 210
83 to 100
Resilience: Unit (Modulus of Resilience), kJ/m3 140
260 to 510
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
22 to 25
Strength to Weight: Bending, points 21
21 to 22
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 14
20 to 22

Alloy Composition

Carbon (C), % 0 to 0.080
0.42 to 0.5
Chromium (Cr), % 17 to 19
0 to 0.4
Iron (Fe), % 64.9 to 74
97.3 to 99.08
Manganese (Mn), % 0 to 2.0
0.5 to 0.8
Molybdenum (Mo), % 0
0 to 0.1
Nickel (Ni), % 9.0 to 12
0 to 0.4
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035