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SAE-AISI 12L14 Steel vs. SAE-AISI 4718 Steel

Both SAE-AISI 12L14 steel and SAE-AISI 4718 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 12L14 steel and the bottom bar is SAE-AISI 4718 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140 to 170
150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11 to 25
24
Fatigue Strength, MPa 190 to 290
270
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 280 to 370
330
Tensile Strength: Ultimate (UTS), MPa 440 to 620
510
Tensile Strength: Yield (Proof), MPa 260 to 460
370

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 51
39
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
3.0
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 1.4
1.6
Embodied Energy, MJ/kg 18
21
Embodied Water, L/kg 47
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 64 to 93
110
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 560
360
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 15 to 22
18
Strength to Weight: Bending, points 16 to 20
18
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 14 to 20
17

Alloy Composition

Carbon (C), % 0 to 0.15
0.16 to 0.21
Chromium (Cr), % 0
0.35 to 0.55
Iron (Fe), % 97.9 to 98.7
96.3 to 97.4
Lead (Pb), % 0.15 to 0.35
0
Manganese (Mn), % 0.85 to 1.2
0.7 to 0.9
Molybdenum (Mo), % 0
0.3 to 0.4
Nickel (Ni), % 0
0.9 to 1.2
Phosphorus (P), % 0.040 to 0.090
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0.26 to 0.35
0 to 0.040