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ACI-ASTM CB7Cu-2 Steel vs. Type 4 Magnetic Alloy

ACI-ASTM CB7Cu-2 steel belongs to the iron alloys classification, while Type 4 magnetic alloy belongs to the nickel alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, 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 Type 4 magnetic alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.7 to 11
2.0 to 40
Fatigue Strength, MPa 420 to 590
220 to 400
Poisson's Ratio 0.28
0.31
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
620 to 1100
Tensile Strength: Yield (Proof), MPa 760 to 1180
270 to 1040

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1370
Specific Heat Capacity, J/kg-K 480
440
Thermal Expansion, µm/m-K 11
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 13
60
Density, g/cm3 7.8
8.8
Embodied Carbon, kg CO2/kg material 2.6
10
Embodied Energy, MJ/kg 38
140
Embodied Water, L/kg 130
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
22 to 200
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
190 to 2840
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 34 to 48
19 to 35
Strength to Weight: Bending, points 28 to 35
18 to 27
Thermal Shock Resistance, points 32 to 45
21 to 37

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 14 to 15.5
0 to 0.3
Cobalt (Co), % 0
0 to 0.5
Copper (Cu), % 2.5 to 3.2
0 to 0.3
Iron (Fe), % 73.6 to 79
9.5 to 17.5
Manganese (Mn), % 0 to 0.7
0 to 0.8
Molybdenum (Mo), % 0
3.5 to 6.0
Nickel (Ni), % 4.5 to 5.5
79 to 82
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.010
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.020