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EN 1.8550 Steel vs. EN 1.4034 Stainless Steel

Both EN 1.8550 steel and EN 1.4034 stainless steel are iron alloys. They have 88% 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 EN 1.8550 steel and the bottom bar is EN 1.4034 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
11 to 14
Fatigue Strength, MPa 470
230 to 400
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Shear Strength, MPa 600
420 to 540
Tensile Strength: Ultimate (UTS), MPa 1000
690 to 900
Tensile Strength: Yield (Proof), MPa 760
390 to 730

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Maximum Temperature: Mechanical, °C 440
770
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 40
30
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.6
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.4
7.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.7
2.0
Embodied Energy, MJ/kg 23
27
Embodied Water, L/kg 67
100

Common Calculations

PREN (Pitting Resistance) 2.3
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
81 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 1550
400 to 1370
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 36
25 to 32
Strength to Weight: Bending, points 29
22 to 27
Thermal Diffusivity, mm2/s 11
8.1
Thermal Shock Resistance, points 29
24 to 32

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.3 to 0.37
0.43 to 0.5
Chromium (Cr), % 1.5 to 1.8
12.5 to 14.5
Iron (Fe), % 94.4 to 96.3
83 to 87.1
Manganese (Mn), % 0.4 to 0.7
0 to 1.0
Molybdenum (Mo), % 0.15 to 0.25
0
Nickel (Ni), % 0.85 to 1.2
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.035
0 to 0.015