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ACI-ASTM CB7Cu-2 Steel vs. SAE-AISI D7 Steel

Both ACI-ASTM CB7Cu-2 steel and SAE-AISI D7 steel are iron alloys. They have 90% 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 D7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
800 to 2120

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Melting Completion (Liquidus), °C 1430
1440
Melting Onset (Solidus), °C 1380
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
27
Thermal Expansion, µm/m-K 11
11

Otherwise Unclassified Properties

Base Metal Price, % relative 13
10
Density, g/cm3 7.8
7.6
Embodied Carbon, kg CO2/kg material 2.6
11
Embodied Energy, MJ/kg 38
180
Embodied Water, L/kg 130
130

Common Calculations

PREN (Pitting Resistance) 15
16
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34 to 48
29 to 78
Strength to Weight: Bending, points 28 to 35
25 to 48
Thermal Diffusivity, mm2/s 4.6
7.4
Thermal Shock Resistance, points 32 to 45
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.070
2.2 to 2.5
Chromium (Cr), % 14 to 15.5
11.5 to 13.5
Copper (Cu), % 2.5 to 3.2
0 to 0.25
Iron (Fe), % 73.6 to 79
76.6 to 81.9
Manganese (Mn), % 0 to 0.7
0 to 0.6
Molybdenum (Mo), % 0
0.7 to 1.2
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 to 0.6
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0
3.8 to 4.4