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AISI W1 Steel vs. SAE-AISI 8740 Steel

Both AISI W1 steel and SAE-AISI 8740 steel are iron alloys. They have a very high 99% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is AISI W1 steel and the bottom bar is SAE-AISI 8740 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 72
73
Tensile Strength: Ultimate (UTS), MPa 590 to 2320
580 to 670

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 48
39
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.1
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 8.2
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 2.2
2.6
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.5
Embodied Energy, MJ/kg 21
20
Embodied Water, L/kg 47
50

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21 to 83
20 to 24
Strength to Weight: Bending, points 20 to 50
20 to 22
Thermal Diffusivity, mm2/s 13
10
Thermal Shock Resistance, points 22 to 85
17 to 20

Alloy Composition

Carbon (C), % 0.7 to 1.5
0.38 to 0.43
Chromium (Cr), % 0 to 0.15
0.4 to 0.6
Copper (Cu), % 0 to 0.2
0
Iron (Fe), % 96.4 to 98.9
96.5 to 97.7
Manganese (Mn), % 0.35 to 0.73
0.75 to 1.0
Molybdenum (Mo), % 0 to 0.1
0.2 to 0.3
Nickel (Ni), % 0 to 0.2
0.4 to 0.7
Phosphorus (P), % 0 to 0.025
0 to 0.035
Silicon (Si), % 0.1 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.025
0 to 0.040
Tungsten (W), % 0 to 0.15
0
Vanadium (V), % 0 to 0.1
0

Comparable Variants