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EN 1.4434 Stainless Steel vs. EN 1.8550 Steel

Both EN 1.4434 stainless steel and EN 1.8550 steel are iron alloys. They have 68% 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 1.4434 stainless steel and the bottom bar is EN 1.8550 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
300
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 41
11
Fatigue Strength, MPa 270
470
Impact Strength: V-Notched Charpy, J 90
34
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 79
73
Shear Strength, MPa 450
600
Tensile Strength: Ultimate (UTS), MPa 660
1000
Tensile Strength: Yield (Proof), MPa 310
760

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 980
440
Melting Completion (Liquidus), °C 1450
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 21
3.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 4.2
1.7
Embodied Energy, MJ/kg 57
23
Embodied Water, L/kg 160
67

Common Calculations

PREN (Pitting Resistance) 32
2.3
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
100
Resilience: Unit (Modulus of Resilience), kJ/m3 240
1550
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 23
36
Strength to Weight: Bending, points 21
29
Thermal Diffusivity, mm2/s 4.0
11
Thermal Shock Resistance, points 15
29

Alloy Composition

Aluminum (Al), % 0
0.8 to 1.2
Carbon (C), % 0 to 0.030
0.3 to 0.37
Chromium (Cr), % 16.5 to 19.5
1.5 to 1.8
Iron (Fe), % 59.2 to 69.9
94.4 to 96.3
Manganese (Mn), % 0 to 2.0
0.4 to 0.7
Molybdenum (Mo), % 3.0 to 4.0
0.15 to 0.25
Nickel (Ni), % 10.5 to 14
0.85 to 1.2
Nitrogen (N), % 0.1 to 0.2
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