MakeItFrom.com
Menu (ESC)

SAE-AISI A8 Steel vs. SAE-AISI 1078 Steel

Both SAE-AISI A8 steel and SAE-AISI 1078 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A8 steel and the bottom bar is SAE-AISI 1078 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
730 to 780

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 37
49
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.3
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
1.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 31
18
Embodied Water, L/kg 73
45

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 68
26 to 28
Strength to Weight: Bending, points 22 to 44
23 to 24
Thermal Diffusivity, mm2/s 9.9
13
Thermal Shock Resistance, points 22 to 62
25 to 26

Alloy Composition

Carbon (C), % 0.5 to 0.6
0.72 to 0.85
Chromium (Cr), % 4.8 to 5.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.5 to 91.9
98.5 to 99
Manganese (Mn), % 0 to 0.5
0.3 to 0.6
Molybdenum (Mo), % 1.2 to 1.7
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.75 to 1.1
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Tungsten (W), % 1.0 to 1.5
0