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AISI 418 Stainless Steel vs. EN 1.5681 Steel

Both AISI 418 stainless steel and EN 1.5681 steel are iron alloys. They have 84% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 418 stainless steel and the bottom bar is EN 1.5681 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 520
300
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 1100
630
Tensile Strength: Yield (Proof), MPa 850
430

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Maximum Temperature: Mechanical, °C 770
420
Melting Completion (Liquidus), °C 1500
1460
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 25
48
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
9.0

Otherwise Unclassified Properties

Base Metal Price, % relative 15
5.0
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.9
1.9
Embodied Energy, MJ/kg 41
25
Embodied Water, L/kg 110
55

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
110
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
490
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
22
Strength to Weight: Bending, points 29
21
Thermal Diffusivity, mm2/s 6.7
13
Thermal Shock Resistance, points 40
19

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.060 to 0.12
Chromium (Cr), % 12 to 14
0
Iron (Fe), % 78.5 to 83.6
92.9 to 94.9
Manganese (Mn), % 0 to 0.5
0.5 to 0.8
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 1.8 to 2.2
4.5 to 5.5
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 2.5 to 3.5
0