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EN 1.4411 Stainless Steel vs. EN 1.4418 Stainless Steel

Both EN 1.4411 stainless steel and EN 1.4418 stainless steel are iron alloys. Their average alloy composition is basically identical. There are 32 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 EN 1.4411 stainless steel and the bottom bar is EN 1.4418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 17
16 to 20
Fatigue Strength, MPa 370
350 to 480
Impact Strength: V-Notched Charpy, J 68
62 to 90
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 870
860 to 1000
Tensile Strength: Yield (Proof), MPa 600
540 to 790

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 410
410
Maximum Temperature: Mechanical, °C 880
870
Melting Completion (Liquidus), °C 1450
1450
Melting Onset (Solidus), °C 1410
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 13
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.0
2.8
Embodied Energy, MJ/kg 41
39
Embodied Water, L/kg 130
130

Common Calculations

PREN (Pitting Resistance) 22
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
130 to 170
Resilience: Unit (Modulus of Resilience), kJ/m3 920
730 to 1590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31
31 to 36
Strength to Weight: Bending, points 26
26 to 28
Thermal Diffusivity, mm2/s 4.6
4.0
Thermal Shock Resistance, points 28
31 to 36

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.060
Chromium (Cr), % 15 to 17
15 to 17
Iron (Fe), % 73.1 to 79.5
73.2 to 80.2
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 1.5 to 2.0
0.8 to 1.5
Nickel (Ni), % 4.0 to 6.0
4.0 to 6.0
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 0.7
Sulfur (S), % 0 to 0.025
0 to 0.015