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AISI 418 Stainless Steel vs. EN 1.4901 Stainless Steel

Both AISI 418 stainless steel and EN 1.4901 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 32 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 AISI 418 stainless steel and the bottom bar is EN 1.4901 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 17
19
Fatigue Strength, MPa 520
310
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Shear Strength, MPa 680
460
Tensile Strength: Ultimate (UTS), MPa 1100
740
Tensile Strength: Yield (Proof), MPa 850
490

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Maximum Temperature: Corrosion, °C 390
380
Maximum Temperature: Mechanical, °C 770
650
Melting Completion (Liquidus), °C 1500
1490
Melting Onset (Solidus), °C 1460
1450
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 25
26
Thermal Expansion, µm/m-K 10
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
8.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
9.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.9
2.8
Embodied Energy, MJ/kg 41
40
Embodied Water, L/kg 110
89

Common Calculations

PREN (Pitting Resistance) 19
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
120
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
620
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
26
Strength to Weight: Bending, points 29
23
Thermal Diffusivity, mm2/s 6.7
6.9
Thermal Shock Resistance, points 40
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Boron (B), % 0
0.0010 to 0.0060
Carbon (C), % 0.15 to 0.2
0.070 to 0.13
Chromium (Cr), % 12 to 14
8.5 to 9.5
Iron (Fe), % 78.5 to 83.6
85.8 to 89.1
Manganese (Mn), % 0 to 0.5
0.3 to 0.6
Molybdenum (Mo), % 0 to 0.5
0.3 to 0.6
Nickel (Ni), % 1.8 to 2.2
0 to 0.4
Niobium (Nb), % 0
0.040 to 0.090
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.040
0 to 0.020
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 2.5 to 3.5
1.5 to 2.0
Vanadium (V), % 0
0.15 to 0.25
Zirconium (Zr), % 0
0 to 0.010