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ACI-ASTM CB7Cu-2 Steel vs. ACI-ASTM CF20 Steel

Both ACI-ASTM CB7Cu-2 steel and ACI-ASTM CF20 steel are iron alloys. They have 90% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (2, 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 ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 5.7 to 11
50
Fatigue Strength, MPa 420 to 590
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
530
Tensile Strength: Yield (Proof), MPa 760 to 1180
250

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 13
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.1
Embodied Energy, MJ/kg 38
44
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 15
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34 to 48
19
Strength to Weight: Bending, points 28 to 35
19
Thermal Diffusivity, mm2/s 4.6
4.3
Thermal Shock Resistance, points 32 to 45
11

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.2
Chromium (Cr), % 14 to 15.5
18 to 21
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 73.6 to 79
64.2 to 74
Manganese (Mn), % 0 to 0.7
0 to 1.5
Nickel (Ni), % 4.5 to 5.5
8.0 to 11
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040