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EN 1.4905 Stainless Steel vs. AISI 418 Stainless Steel

Both EN 1.4905 stainless steel and AISI 418 stainless steel are iron alloys. They have a moderately high 92% 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 EN 1.4905 stainless steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 19
17
Fatigue Strength, MPa 330
520
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Shear Strength, MPa 460
680
Tensile Strength: Ultimate (UTS), MPa 740
1100
Tensile Strength: Yield (Proof), MPa 510
850

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 380
390
Maximum Temperature: Mechanical, °C 660
770
Melting Completion (Liquidus), °C 1480
1500
Melting Onset (Solidus), °C 1440
1460
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 26
25
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.7
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 4.2
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
15
Density, g/cm3 7.9
8.0
Embodied Carbon, kg CO2/kg material 2.8
2.9
Embodied Energy, MJ/kg 40
41
Embodied Water, L/kg 90
110

Common Calculations

PREN (Pitting Resistance) 15
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 680
1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
38
Strength to Weight: Bending, points 23
29
Thermal Diffusivity, mm2/s 7.0
6.7
Thermal Shock Resistance, points 25
40

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Boron (B), % 0.00050 to 0.0050
0
Carbon (C), % 0.090 to 0.13
0.15 to 0.2
Chromium (Cr), % 8.5 to 9.5
12 to 14
Iron (Fe), % 86.2 to 88.8
78.5 to 83.6
Manganese (Mn), % 0.3 to 0.6
0 to 0.5
Molybdenum (Mo), % 0.9 to 1.1
0 to 0.5
Nickel (Ni), % 0.1 to 0.4
1.8 to 2.2
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.050 to 0.090
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0.1 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Tungsten (W), % 0.9 to 1.1
2.5 to 3.5
Vanadium (V), % 0.18 to 0.25
0