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SAE-AISI D5 Steel vs. SAE-AISI 81B45 Steel

Both SAE-AISI D5 steel and SAE-AISI 81B45 steel are iron alloys. They have 83% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI D5 steel and the bottom bar is SAE-AISI 81B45 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.4 to 14
12 to 24
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 75
73
Shear Strength, MPa 470 to 1180
340 to 400
Tensile Strength: Ultimate (UTS), MPa 770 to 2030
540 to 670

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 27
40
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.2
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 4.9
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
2.3
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.5
1.5
Embodied Energy, MJ/kg 51
20
Embodied Water, L/kg 120
49

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 73
19 to 24
Strength to Weight: Bending, points 24 to 46
19 to 22
Thermal Diffusivity, mm2/s 7.4
11
Thermal Shock Resistance, points 26 to 67
17 to 21

Alloy Composition

Boron (B), % 0
0.00050 to 0.0030
Carbon (C), % 1.4 to 1.6
0.43 to 0.48
Chromium (Cr), % 11 to 13
0.35 to 0.55
Cobalt (Co), % 2.5 to 3.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.9 to 84.4
97 to 98
Manganese (Mn), % 0 to 0.6
0.75 to 1.0
Molybdenum (Mo), % 0.7 to 1.2
0.080 to 0.15
Nickel (Ni), % 0 to 0.3
0.2 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.6
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Vanadium (V), % 0 to 1.0
0

Comparable Variants