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SAE-AISI 4118 Steel vs. SAE-AISI 1019 Steel

Both SAE-AISI 4118 steel and SAE-AISI 1019 steel are iron alloys. They have a very high 99% 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 4118 steel and the bottom bar is SAE-AISI 1019 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
130 to 140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 23
17 to 29
Fatigue Strength, MPa 230
190 to 290
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 320
300 to 320
Tensile Strength: Ultimate (UTS), MPa 500
470 to 520
Tensile Strength: Yield (Proof), MPa 320
250 to 430

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 410
400
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 46
52
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.0

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
1.8
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
18
Embodied Water, L/kg 49
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 100
82 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 280
160 to 500
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 18
17 to 18
Strength to Weight: Bending, points 18
17 to 18
Thermal Diffusivity, mm2/s 13
14
Thermal Shock Resistance, points 15
15 to 16

Alloy Composition

Carbon (C), % 0.18 to 0.23
0.15 to 0.2
Chromium (Cr), % 0.4 to 0.6
0
Iron (Fe), % 97.5 to 98.4
98.7 to 99.15
Manganese (Mn), % 0.7 to 0.9
0.7 to 1.0
Molybdenum (Mo), % 0.2 to 0.3
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.15 to 0.35
0
Sulfur (S), % 0 to 0.040
0 to 0.050