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SAE-AISI T4 Steel vs. ACI-ASTM CF8C Steel

Both SAE-AISI T4 steel and ACI-ASTM CF8C steel are iron alloys. They have 73% of their average alloy composition in common. There are 22 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 T4 steel and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
77
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
530

Thermal Properties

Latent Heat of Fusion, J/g 250
300
Melting Completion (Liquidus), °C 1810
1420
Melting Onset (Solidus), °C 1750
1430
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 21
16
Thermal Expansion, µm/m-K 12
17

Otherwise Unclassified Properties

Base Metal Price, % relative 55
19
Density, g/cm3 9.4
7.8
Embodied Carbon, kg CO2/kg material 8.5
3.7
Embodied Energy, MJ/kg 130
53
Embodied Water, L/kg 120
150

Common Calculations

PREN (Pitting Resistance) 37
20
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
19
Strength to Weight: Bending, points 20 to 39
19
Thermal Diffusivity, mm2/s 5.4
4.3
Thermal Shock Resistance, points 24 to 64
11

Alloy Composition

Carbon (C), % 0.7 to 0.8
0 to 0.080
Chromium (Cr), % 3.8 to 4.5
18 to 21
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 66.3 to 72.3
61.8 to 73
Manganese (Mn), % 0.1 to 0.4
0 to 1.5
Molybdenum (Mo), % 0.4 to 1.0
0 to 0.5
Nickel (Ni), % 0 to 0.3
9.0 to 12
Niobium (Nb), % 0
0 to 1.0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.2 to 0.4
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0