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EN 1.4401 Stainless Steel vs. EN 1.8818 Steel

Both EN 1.4401 stainless steel and EN 1.8818 steel are iron alloys. They have 69% 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 1.4401 stainless steel and the bottom bar is EN 1.8818 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 270
130
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14 to 40
27
Fatigue Strength, MPa 200 to 320
200
Impact Strength: V-Notched Charpy, J 91 to 94
48
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
73
Shear Strength, MPa 410 to 550
280
Tensile Strength: Ultimate (UTS), MPa 600 to 900
440
Tensile Strength: Yield (Proof), MPa 230 to 570
270

Thermal Properties

Latent Heat of Fusion, J/g 290
250
Maximum Temperature: Mechanical, °C 950
400
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 15
48
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 19
2.4
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.8
1.6
Embodied Energy, MJ/kg 52
21
Embodied Water, L/kg 150
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110 to 190
110
Resilience: Unit (Modulus of Resilience), kJ/m3 130 to 800
200
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 32
16
Strength to Weight: Bending, points 20 to 26
16
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 13 to 20
13

Alloy Composition

Aluminum (Al), % 0
0.015 to 0.034
Carbon (C), % 0 to 0.070
0 to 0.15
Chromium (Cr), % 16.5 to 18.5
0 to 0.35
Copper (Cu), % 0
0 to 0.6
Iron (Fe), % 62.8 to 71.5
95.9 to 99.985
Manganese (Mn), % 0 to 2.0
0 to 1.6
Molybdenum (Mo), % 2.0 to 2.5
0 to 0.13
Nickel (Ni), % 10 to 13
0 to 0.35
Niobium (Nb), % 0
0 to 0.060
Nitrogen (N), % 0 to 0.1
0 to 0.017
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 0.55
Sulfur (S), % 0 to 0.015
0 to 0.030
Titanium (Ti), % 0
0 to 0.060
Vanadium (V), % 0
0 to 0.1