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EN 1.4547 Stainless Steel vs. SAE-AISI 4718 Steel

Both EN 1.4547 stainless steel and SAE-AISI 4718 steel are iron alloys. They have 56% of their average alloy composition in common. There are 31 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 1.4547 stainless steel and the bottom bar is SAE-AISI 4718 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
150
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
24
Fatigue Strength, MPa 290
270
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
73
Shear Strength, MPa 510
330
Tensile Strength: Ultimate (UTS), MPa 750
510
Tensile Strength: Yield (Proof), MPa 340
370

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1090
420
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 14
39
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 28
3.0
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 5.6
1.6
Embodied Energy, MJ/kg 75
21
Embodied Water, L/kg 190
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
110
Resilience: Unit (Modulus of Resilience), kJ/m3 290
360
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 26
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 3.8
10
Thermal Shock Resistance, points 16
17

Alloy Composition

Carbon (C), % 0 to 0.020
0.16 to 0.21
Chromium (Cr), % 19.5 to 20.5
0.35 to 0.55
Copper (Cu), % 0.5 to 1.0
0
Iron (Fe), % 51 to 56.3
96.3 to 97.4
Manganese (Mn), % 0 to 1.0
0.7 to 0.9
Molybdenum (Mo), % 6.0 to 7.0
0.3 to 0.4
Nickel (Ni), % 17.5 to 18.5
0.9 to 1.2
Nitrogen (N), % 0.18 to 0.25
0
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.7
0.15 to 0.35
Sulfur (S), % 0 to 0.010
0 to 0.040