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AISI 418 Stainless Steel vs. EN 1.4438 Stainless Steel

Both AISI 418 stainless steel and EN 1.4438 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 33 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 AISI 418 stainless steel and the bottom bar is EN 1.4438 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 330
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
41
Fatigue Strength, MPa 520
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 680
420
Tensile Strength: Ultimate (UTS), MPa 1100
620
Tensile Strength: Yield (Proof), MPa 850
250

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 770
1000
Melting Completion (Liquidus), °C 1500
1450
Melting Onset (Solidus), °C 1460
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 25
14
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.8
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
22
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 2.9
4.4
Embodied Energy, MJ/kg 41
60
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 19
31
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1830
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 38
22
Strength to Weight: Bending, points 29
20
Thermal Diffusivity, mm2/s 6.7
3.7
Thermal Shock Resistance, points 40
14

Alloy Composition

Carbon (C), % 0.15 to 0.2
0 to 0.030
Chromium (Cr), % 12 to 14
17.5 to 19.5
Iron (Fe), % 78.5 to 83.6
57.3 to 66.5
Manganese (Mn), % 0 to 0.5
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
3.0 to 4.0
Nickel (Ni), % 1.8 to 2.2
13 to 16
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 2.5 to 3.5
0