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SAE-AISI A8 Steel vs. SAE-AISI D5 Steel

Both SAE-AISI A8 steel and SAE-AISI D5 steel are iron alloys. They have 89% of their average alloy composition in common. There are 24 material properties with values for both materials. Properties with values for just one material (2, 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 D5 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 74
75
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
770 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1480
1430
Melting Onset (Solidus), °C 1430
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 37
27
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.3
4.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
4.9

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
13
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 2.3
3.5
Embodied Energy, MJ/kg 31
51
Embodied Water, L/kg 73
120

Common Calculations

PREN (Pitting Resistance) 12
15
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 25 to 68
28 to 73
Strength to Weight: Bending, points 22 to 44
24 to 46
Thermal Diffusivity, mm2/s 9.9
7.4
Thermal Shock Resistance, points 22 to 62
26 to 67

Alloy Composition

Carbon (C), % 0.5 to 0.6
1.4 to 1.6
Chromium (Cr), % 4.8 to 5.5
11 to 13
Cobalt (Co), % 0
2.5 to 3.5
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 88.5 to 91.9
77.9 to 84.4
Manganese (Mn), % 0 to 0.5
0 to 0.6
Molybdenum (Mo), % 1.2 to 1.7
0.7 to 1.2
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.75 to 1.1
0 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 1.5
0
Vanadium (V), % 0
0 to 1.0

Comparable Variants