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AISI 418 Stainless Steel vs. EN 1.4150 Stainless Steel

Both AISI 418 stainless steel and EN 1.4150 stainless steel are iron alloys. They have a very high 95% 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 AISI 418 stainless steel and the bottom bar is EN 1.4150 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
220
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
20
Fatigue Strength, MPa 520
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 680
460
Tensile Strength: Ultimate (UTS), MPa 1100
730
Tensile Strength: Yield (Proof), MPa 850
430

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 770
840
Melting Completion (Liquidus), °C 1500
1420
Melting Onset (Solidus), °C 1460
1380
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 25
23
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 15
8.5
Density, g/cm3 8.0
7.6
Embodied Carbon, kg CO2/kg material 2.9
2.8
Embodied Energy, MJ/kg 41
42
Embodied Water, L/kg 110
120

Common Calculations

PREN (Pitting Resistance) 19
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
470
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 38
27
Strength to Weight: Bending, points 29
24
Thermal Diffusivity, mm2/s 6.7
6.2
Thermal Shock Resistance, points 40
27

Alloy Composition

Carbon (C), % 0.15 to 0.2
0.45 to 0.6
Chromium (Cr), % 12 to 14
15 to 16.5
Iron (Fe), % 78.5 to 83.6
79 to 82.8
Manganese (Mn), % 0 to 0.5
0 to 0.8
Molybdenum (Mo), % 0 to 0.5
0.2 to 0.4
Nickel (Ni), % 1.8 to 2.2
0 to 0.4
Nitrogen (N), % 0
0.050 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.5
1.3 to 1.7
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 2.5 to 3.5
0
Vanadium (V), % 0
0.2 to 0.4