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SAE-AISI 1038 Steel vs. SAE-AISI 8115 Steel

Both SAE-AISI 1038 steel and SAE-AISI 8115 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 1038 steel and the bottom bar is SAE-AISI 8115 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170 to 180
180
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 14 to 20
15
Fatigue Strength, MPa 220 to 350
320
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Shear Strength, MPa 370 to 390
370
Tensile Strength: Ultimate (UTS), MPa 590 to 640
610
Tensile Strength: Yield (Proof), MPa 320 to 540
500

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
43
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.0
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 8.0
8.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.4
1.5
Embodied Energy, MJ/kg 18
19
Embodied Water, L/kg 46
49

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 100
86
Resilience: Unit (Modulus of Resilience), kJ/m3 270 to 790
660
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 23
21
Strength to Weight: Bending, points 20 to 21
20
Thermal Diffusivity, mm2/s 14
12
Thermal Shock Resistance, points 19 to 20
19

Alloy Composition

Carbon (C), % 0.35 to 0.42
0.13 to 0.18
Chromium (Cr), % 0
0.3 to 0.5
Iron (Fe), % 98.6 to 99.05
97.4 to 98.4
Manganese (Mn), % 0.6 to 0.9
0.7 to 0.9
Molybdenum (Mo), % 0
0.080 to 0.15
Nickel (Ni), % 0
0.2 to 0.4
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