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SAE-AISI 4718 Steel vs. EN 1.4477 Stainless Steel

Both SAE-AISI 4718 steel and EN 1.4477 stainless steel are iron alloys. They have 63% 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 SAE-AISI 4718 steel and the bottom bar is EN 1.4477 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
270
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 24
22 to 23
Fatigue Strength, MPa 270
420 to 490
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 73
81
Shear Strength, MPa 330
550 to 580
Tensile Strength: Ultimate (UTS), MPa 510
880 to 930
Tensile Strength: Yield (Proof), MPa 370
620 to 730

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Maximum Temperature: Mechanical, °C 420
1100
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
13
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
20
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.6
3.7
Embodied Energy, MJ/kg 21
52
Embodied Water, L/kg 51
190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
180 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 360
940 to 1290
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
31 to 33
Strength to Weight: Bending, points 18
26 to 27
Thermal Diffusivity, mm2/s 10
3.5
Thermal Shock Resistance, points 17
23 to 25

Alloy Composition

Carbon (C), % 0.16 to 0.21
0 to 0.030
Chromium (Cr), % 0.35 to 0.55
28 to 30
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 96.3 to 97.4
56.6 to 63.6
Manganese (Mn), % 0.7 to 0.9
0.8 to 1.5
Molybdenum (Mo), % 0.3 to 0.4
1.5 to 2.6
Nickel (Ni), % 0.9 to 1.2
5.8 to 7.5
Nitrogen (N), % 0
0.3 to 0.4
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.15 to 0.35
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.015