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SAE-AISI T4 Steel vs. ASTM A372 Grade D Steel

Both SAE-AISI T4 steel and ASTM A372 grade D steel are iron alloys. They have 70% 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 T4 steel and the bottom bar is ASTM A372 grade D steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 80
73
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
810

Thermal Properties

Latent Heat of Fusion, J/g 250
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 21
51
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 55
2.1
Density, g/cm3 9.4
7.8
Embodied Carbon, kg CO2/kg material 8.5
1.5
Embodied Energy, MJ/kg 130
20
Embodied Water, L/kg 120
48

Common Calculations

Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 21
24
Strength to Weight: Axial, points 24 to 64
29
Strength to Weight: Bending, points 20 to 39
25
Thermal Diffusivity, mm2/s 5.4
14
Thermal Shock Resistance, points 24 to 64
26

Alloy Composition

Carbon (C), % 0.7 to 0.8
0.4 to 0.5
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
97.1 to 97.9
Manganese (Mn), % 0.1 to 0.4
1.4 to 1.8
Molybdenum (Mo), % 0.4 to 1.0
0.17 to 0.27
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.2 to 0.4
0.15 to 0.35
Sulfur (S), % 0 to 0.030
0 to 0.010
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0