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AISI 418 Stainless Steel vs. EN 1.4557 Stainless Steel

Both AISI 418 stainless steel and EN 1.4557 stainless 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 (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 1.4557 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
40
Fatigue Strength, MPa 520
260
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 1100
560
Tensile Strength: Yield (Proof), MPa 850
300

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 770
1090
Melting Completion (Liquidus), °C 1500
1460
Melting Onset (Solidus), °C 1460
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 25
15
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.2

Otherwise Unclassified Properties

Base Metal Price, % relative 15
29
Density, g/cm3 8.0
8.0
Embodied Carbon, kg CO2/kg material 2.9
5.6
Embodied Energy, MJ/kg 41
76
Embodied Water, L/kg 110
190

Common Calculations

PREN (Pitting Resistance) 19
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
190
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 38
19
Strength to Weight: Bending, points 29
19
Thermal Diffusivity, mm2/s 6.7
4.0
Thermal Shock Resistance, points 40
12

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.020
Chromium (Cr), % 12 to 14
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 78.5 to 83.6
49.5 to 56.3
Manganese (Mn), % 0 to 0.5
0 to 1.2
Molybdenum (Mo), % 0 to 0.5
6.0 to 7.0
Nickel (Ni), % 1.8 to 2.2
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 2.5 to 3.5
0