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SAE-AISI 81B45 Steel vs. SAE-AISI 1086 Steel

Both SAE-AISI 81B45 steel and SAE-AISI 1086 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 81B45 steel and the bottom bar is SAE-AISI 1086 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 200
220 to 260
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 24
11
Fatigue Strength, MPa 250 to 350
300 to 360
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
72
Shear Strength, MPa 340 to 400
450 to 520
Tensile Strength: Ultimate (UTS), MPa 540 to 670
760 to 870
Tensile Strength: Yield (Proof), MPa 350 to 560
480 to 580

Thermal Properties

Latent Heat of Fusion, J/g 250
240
Maximum Temperature: Mechanical, °C 410
400
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 40
50
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 2.3
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.5
1.4
Embodied Energy, MJ/kg 20
19
Embodied Water, L/kg 49
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 110
79 to 84
Resilience: Unit (Modulus of Resilience), kJ/m3 320 to 840
610 to 890
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 24
27 to 31
Strength to Weight: Bending, points 19 to 22
24 to 26
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 17 to 21
26 to 30

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0.8 to 0.93
Chromium (Cr), % 0.35 to 0.55
0
Iron (Fe), % 97 to 98
98.5 to 98.9
Manganese (Mn), % 0.75 to 1.0
0.3 to 0.5
Molybdenum (Mo), % 0.080 to 0.15
0
Nickel (Ni), % 0.2 to 0.4
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