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

Both ACI-ASTM CB7Cu-2 steel and SAE-AISI T4 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 ACI-ASTM CB7Cu-2 steel and the bottom bar is SAE-AISI T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Otherwise Unclassified Properties

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

Common Calculations

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

Alloy Composition

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