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AISI 409 Stainless Steel vs. EN 1.8550 Steel

Both AISI 409 stainless steel and EN 1.8550 steel are iron alloys. They have 90% of their average alloy composition in common. There are 31 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 AISI 409 stainless steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 24
11
Fatigue Strength, MPa 140
470
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 270
600
Tensile Strength: Ultimate (UTS), MPa 420
1000
Tensile Strength: Yield (Proof), MPa 200
760

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 710
440
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
40
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 6.5
3.4
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.7
Embodied Energy, MJ/kg 28
23
Embodied Water, L/kg 94
67

Common Calculations

PREN (Pitting Resistance) 11
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 83
100
Resilience: Unit (Modulus of Resilience), kJ/m3 100
1550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 15
36
Strength to Weight: Bending, points 16
29
Thermal Diffusivity, mm2/s 6.7
11
Thermal Shock Resistance, points 15
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.080
0.3 to 0.37
Chromium (Cr), % 10.5 to 11.7
1.5 to 1.8
Iron (Fe), % 84.9 to 89.5
94.4 to 96.3
Manganese (Mn), % 0 to 1.0
0.4 to 0.7
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0 to 0.5
0.85 to 1.2
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Titanium (Ti), % 0 to 0.75
0