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SAE-AISI T1 Steel vs. SAE-AISI 8740 Steel

Both SAE-AISI T1 steel and SAE-AISI 8740 steel are iron alloys. They have 77% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T1 steel and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 770 to 2130
580 to 670

Thermal Properties

Latent Heat of Fusion, J/g 240
250
Melting Completion (Liquidus), °C 1810
1460
Melting Onset (Solidus), °C 1750
1420
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 20
39
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 45
2.6
Density, g/cm3 9.3
7.8
Embodied Carbon, kg CO2/kg material 8.2
1.5
Embodied Energy, MJ/kg 130
20
Embodied Water, L/kg 90
50

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 23 to 64
20 to 24
Strength to Weight: Bending, points 20 to 40
20 to 22
Thermal Diffusivity, mm2/s 5.2
10
Thermal Shock Resistance, points 23 to 64
17 to 20

Alloy Composition

Carbon (C), % 0.65 to 0.8
0.38 to 0.43
Chromium (Cr), % 3.8 to 4.5
0.4 to 0.6
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.2 to 77.2
96.5 to 97.7
Manganese (Mn), % 0.1 to 0.4
0.75 to 1.0
Molybdenum (Mo), % 0
0.2 to 0.3
Nickel (Ni), % 0 to 0.3
0.4 to 0.7
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.2 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 17.3 to 18.8
0
Vanadium (V), % 0.9 to 1.3
0

Comparable Variants