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ACI-ASTM CB7Cu-1 Steel vs. ASTM A369 Grade FP21

Both ACI-ASTM CB7Cu-1 steel and ASTM A369 grade FP21 are iron alloys. They have 79% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, 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 ASTM A369 grade FP21.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
140
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.7 to 11
20
Fatigue Strength, MPa 420 to 590
160
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
470
Tensile Strength: Yield (Proof), MPa 760 to 1180
240

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1430
1470
Melting Onset (Solidus), °C 1500
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
41
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
7.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
8.8

Otherwise Unclassified Properties

Base Metal Price, % relative 13
4.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
1.8
Embodied Energy, MJ/kg 38
23
Embodied Water, L/kg 130
61

Common Calculations

PREN (Pitting Resistance) 17
6.2
Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
80
Resilience: Unit (Modulus of Resilience), kJ/m3 1500 to 3590
150
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 34 to 48
17
Strength to Weight: Bending, points 28 to 35
17
Thermal Diffusivity, mm2/s 4.6
11
Thermal Shock Resistance, points 32 to 45
14

Alloy Composition

Carbon (C), % 0 to 0.070
0.050 to 0.15
Chromium (Cr), % 15.5 to 17.7
2.7 to 3.4
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 72.3 to 78.4
94.3 to 96.2
Manganese (Mn), % 0 to 0.7
0.3 to 0.6
Molybdenum (Mo), % 0
0.8 to 1.1
Nickel (Ni), % 3.6 to 4.6
0
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0
Phosphorus (P), % 0 to 0.035
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025