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SAE-AISI T4 Steel vs. ACI-ASTM CB7Cu-2 Steel

Both SAE-AISI T4 steel and ACI-ASTM CB7Cu-2 steel are iron alloys. They have 74% of their average alloy composition in common. There are 22 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 SAE-AISI T4 steel and the bottom bar is ACI-ASTM CB7Cu-2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 800 to 2140
960 to 1350

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1810
1430
Melting Onset (Solidus), °C 1750
1380
Specific Heat Capacity, J/kg-K 410
480
Thermal Conductivity, W/m-K 21
17
Thermal Expansion, µm/m-K 12
11

Otherwise Unclassified Properties

Base Metal Price, % relative 55
13
Density, g/cm3 9.4
7.8
Embodied Carbon, kg CO2/kg material 8.5
2.6
Embodied Energy, MJ/kg 130
38
Embodied Water, L/kg 120
130

Common Calculations

PREN (Pitting Resistance) 37
15
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 24 to 64
34 to 48
Strength to Weight: Bending, points 20 to 39
28 to 35
Thermal Diffusivity, mm2/s 5.4
4.6
Thermal Shock Resistance, points 24 to 64
32 to 45

Alloy Composition

Carbon (C), % 0.7 to 0.8
0 to 0.070
Chromium (Cr), % 3.8 to 4.5
14 to 15.5
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
2.5 to 3.2
Iron (Fe), % 66.3 to 72.3
73.6 to 79
Manganese (Mn), % 0.1 to 0.4
0 to 0.7
Molybdenum (Mo), % 0.4 to 1.0
0
Nickel (Ni), % 0 to 0.3
4.5 to 5.5
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0.2 to 0.4
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 17.5 to 19
0
Vanadium (V), % 0.8 to 1.2
0