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ACI-ASTM CB7Cu-1 Steel vs. AWS ERTi-7

ACI-ASTM CB7Cu-1 steel belongs to the iron alloys classification, while AWS ERTi-7 belongs to the titanium alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CB7Cu-1 steel and the bottom bar is AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 5.7 to 11
20
Fatigue Strength, MPa 420 to 590
190
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 76
40
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
340
Tensile Strength: Yield (Proof), MPa 760 to 1180
280

Thermal Properties

Latent Heat of Fusion, J/g 280
420
Melting Completion (Liquidus), °C 1430
1670
Melting Onset (Solidus), °C 1500
1620
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 17
21
Thermal Expansion, µm/m-K 11
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.6
47
Embodied Energy, MJ/kg 38
800
Embodied Water, L/kg 130
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
64
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
360
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 34 to 48
21
Strength to Weight: Bending, points 28 to 35
24
Thermal Diffusivity, mm2/s 4.6
8.8
Thermal Shock Resistance, points 32 to 45
26

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 15.5 to 17.7
0
Copper (Cu), % 2.5 to 3.2
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 72.3 to 78.4
0 to 0.12
Manganese (Mn), % 0 to 0.7
0
Nickel (Ni), % 3.6 to 4.6
0
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.035
0
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99.417 to 99.8