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SAE-AISI 1046 Steel vs. SAE-AISI 8645 Steel

Both SAE-AISI 1046 steel and SAE-AISI 8645 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 1046 steel and the bottom bar is SAE-AISI 8645 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 210
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 17
12 to 23
Fatigue Strength, MPa 240 to 390
280 to 350
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
73
Shear Strength, MPa 410 to 450
380 to 400
Tensile Strength: Ultimate (UTS), MPa 660 to 740
600 to 670
Tensile Strength: Yield (Proof), MPa 370 to 610
390 to 560

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Maximum Temperature: Mechanical, °C 400
410
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 51
39
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 12
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
20
Embodied Water, L/kg 46
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 91 to 95
77 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 360 to 990
420 to 840
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 23 to 26
21 to 24
Strength to Weight: Bending, points 22 to 23
20 to 22
Thermal Diffusivity, mm2/s 14
10
Thermal Shock Resistance, points 23 to 25
18 to 20

Alloy Composition

Carbon (C), % 0.43 to 0.5
0.43 to 0.48
Chromium (Cr), % 0
0.4 to 0.6
Iron (Fe), % 98.4 to 98.9
96.5 to 97.7
Manganese (Mn), % 0.7 to 1.0
0.75 to 1.0
Molybdenum (Mo), % 0
0.15 to 0.25
Nickel (Ni), % 0
0.4 to 0.7
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

Comparable Variants