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SAE-AISI 4718 Steel vs. EN 1.7108 Steel

Both SAE-AISI 4718 steel and EN 1.7108 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (6, 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 1.7108 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
200 to 510
Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Tensile Strength: Ultimate (UTS), MPa 510
670 to 2070

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 420
410
Melting Completion (Liquidus), °C 1460
1430
Melting Onset (Solidus), °C 1420
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 39
46
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.4
8.7

Otherwise Unclassified Properties

Base Metal Price, % relative 3.0
2.1
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 1.6
1.5
Embodied Energy, MJ/kg 21
20
Embodied Water, L/kg 51
47

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 18
24 to 75
Strength to Weight: Bending, points 18
22 to 47
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 17
20 to 63

Alloy Composition

Carbon (C), % 0.16 to 0.21
0.57 to 0.65
Chromium (Cr), % 0.35 to 0.55
0.2 to 0.45
Iron (Fe), % 96.3 to 97.4
95.9 to 96.9
Manganese (Mn), % 0.7 to 0.9
0.7 to 1.0
Molybdenum (Mo), % 0.3 to 0.4
0
Nickel (Ni), % 0.9 to 1.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0.15 to 0.35
1.6 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.025