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SAE-AISI 81B45 Steel vs. SAE-AISI 1117 Steel

Both SAE-AISI 81B45 steel and SAE-AISI 1117 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 81B45 steel and the bottom bar is SAE-AISI 1117 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 200
140 to 150
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 12 to 24
17 to 26
Fatigue Strength, MPa 250 to 350
190 to 300
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 340 to 400
320 to 330
Tensile Strength: Ultimate (UTS), MPa 540 to 670
490 to 540
Tensile Strength: Yield (Proof), MPa 350 to 560
260 to 460

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 40
52
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.2
7.1
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
18
Embodied Water, L/kg 49
47

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 77 to 110
86 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 320 to 840
180 to 550
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 19 to 24
17 to 19
Strength to Weight: Bending, points 19 to 22
18 to 19
Thermal Diffusivity, mm2/s 11
14
Thermal Shock Resistance, points 17 to 21
15 to 17

Alloy Composition

Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.43 to 0.48
0.14 to 0.2
Chromium (Cr), % 0.35 to 0.55
0
Iron (Fe), % 97 to 98
98.3 to 98.8
Manganese (Mn), % 0.75 to 1.0
1.0 to 1.3
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
0.080 to 0.13

Comparable Variants