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SAE-AISI 1086 Steel vs. SAE-AISI 4145 Steel

Both SAE-AISI 1086 steel and SAE-AISI 4145 steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 32 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 1086 steel and the bottom bar is SAE-AISI 4145 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 260
310
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 11
16
Fatigue Strength, MPa 300 to 360
240
Poisson's Ratio 0.29
0.29
Reduction in Area, % 28 to 45
46
Shear Modulus, GPa 72
73
Shear Strength, MPa 450 to 520
360
Tensile Strength: Ultimate (UTS), MPa 760 to 870
580
Tensile Strength: Yield (Proof), MPa 480 to 580
360

Thermal Properties

Latent Heat of Fusion, J/g 240
250
Maximum Temperature: Mechanical, °C 400
420
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 50
42
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.1
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.4
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 19
20
Embodied Water, L/kg 45
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 79 to 84
80
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 890
350
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 27 to 31
21
Strength to Weight: Bending, points 24 to 26
20
Thermal Diffusivity, mm2/s 14
11
Thermal Shock Resistance, points 26 to 30
17

Alloy Composition

Carbon (C), % 0.8 to 0.93
0.43 to 0.48
Chromium (Cr), % 0
0.8 to 1.1
Iron (Fe), % 98.5 to 98.9
96.7 to 97.7
Manganese (Mn), % 0.3 to 0.5
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0
0.15 to 0.35
Sulfur (S), % 0 to 0.050
0 to 0.040