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ACI-ASTM CB7Cu-1 Steel vs. AISI 440A Stainless Steel

Both ACI-ASTM CB7Cu-1 steel and AISI 440A stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (6, 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 AISI 440A stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 5.7 to 11
5.0 to 20
Fatigue Strength, MPa 420 to 590
270 to 790
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
77
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
730 to 1790
Tensile Strength: Yield (Proof), MPa 760 to 1180
420 to 1650

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1430
1480
Melting Onset (Solidus), °C 1500
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
23
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.6
2.2
Embodied Energy, MJ/kg 38
31
Embodied Water, L/kg 130
120

Common Calculations

PREN (Pitting Resistance) 17
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
87 to 120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34 to 48
26 to 65
Strength to Weight: Bending, points 28 to 35
23 to 43
Thermal Diffusivity, mm2/s 4.6
6.2
Thermal Shock Resistance, points 32 to 45
26 to 65

Alloy Composition

Carbon (C), % 0 to 0.070
0.6 to 0.75
Chromium (Cr), % 15.5 to 17.7
16 to 18
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 72.3 to 78.4
78.4 to 83.4
Manganese (Mn), % 0 to 0.7
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.75
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 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015