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EN 1.4449 Stainless Steel vs. EN 1.8550 Steel

Both EN 1.4449 stainless steel and EN 1.8550 steel are iron alloys. They have 70% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4449 stainless steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 48
11
Fatigue Strength, MPa 240
470
Impact Strength: V-Notched Charpy, J 91
34
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 440
600
Tensile Strength: Ultimate (UTS), MPa 620
1000
Tensile Strength: Yield (Proof), MPa 250
760

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 960
440
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
40
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 19
3.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.9
1.7
Embodied Energy, MJ/kg 54
23
Embodied Water, L/kg 150
67

Common Calculations

PREN (Pitting Resistance) 27
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
100
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22
36
Strength to Weight: Bending, points 20
29
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 14
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.035
0.3 to 0.37
Chromium (Cr), % 17 to 18.2
1.5 to 1.8
Copper (Cu), % 0 to 1.0
0
Iron (Fe), % 62.4 to 69.3
94.4 to 96.3
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 2.3 to 2.8
0.15 to 0.25
Nickel (Ni), % 11.5 to 12.5
0.85 to 1.2
Nitrogen (N), % 0 to 0.080
0
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.4
Sulfur (S), % 0 to 0.015
0 to 0.035