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EN 1.7366 Steel vs. AISI 418 Stainless Steel

Both EN 1.7366 steel and AISI 418 stainless steel are iron alloys. They have 87% 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 1.7366 steel and the bottom bar is AISI 418 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 210
330
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 17 to 19
17
Fatigue Strength, MPa 160 to 320
520
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
77
Shear Strength, MPa 290 to 440
680
Tensile Strength: Ultimate (UTS), MPa 460 to 710
1100
Tensile Strength: Yield (Proof), MPa 230 to 480
850

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Maximum Temperature: Mechanical, °C 510
770
Melting Completion (Liquidus), °C 1460
1500
Melting Onset (Solidus), °C 1420
1460
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.1
2.8
Electrical Conductivity: Equal Weight (Specific), % IACS 9.3
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 4.3
15
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 1.7
2.9
Embodied Energy, MJ/kg 23
41
Embodied Water, L/kg 69
110

Common Calculations

PREN (Pitting Resistance) 6.8
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 74 to 110
170
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 600
1830
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 16 to 25
38
Strength to Weight: Bending, points 17 to 23
29
Thermal Diffusivity, mm2/s 11
6.7
Thermal Shock Resistance, points 13 to 20
40

Alloy Composition

Carbon (C), % 0 to 0.18
0.15 to 0.2
Chromium (Cr), % 4.0 to 6.0
12 to 14
Iron (Fe), % 91.9 to 95.3
78.5 to 83.6
Manganese (Mn), % 0.3 to 0.8
0 to 0.5
Molybdenum (Mo), % 0.45 to 0.65
0 to 0.5
Nickel (Ni), % 0
1.8 to 2.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Tungsten (W), % 0
2.5 to 3.5