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

Both AISI 440B stainless steel and ACI-ASTM CB7Cu-1 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 AISI 440B stainless steel and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 3.0 to 18
5.7 to 11
Fatigue Strength, MPa 260 to 850
420 to 590
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 740 to 1930
960 to 1350
Tensile Strength: Yield (Proof), MPa 430 to 1860
760 to 1180

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

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

Common Calculations

PREN (Pitting Resistance) 18
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 57 to 110
71 to 120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 70
34 to 48
Strength to Weight: Bending, points 24 to 45
28 to 35
Thermal Diffusivity, mm2/s 6.1
4.6
Thermal Shock Resistance, points 27 to 70
32 to 45

Alloy Composition

Carbon (C), % 0.75 to 1.0
0 to 0.070
Chromium (Cr), % 16 to 18
15.5 to 17.7
Copper (Cu), % 0
2.5 to 3.2
Iron (Fe), % 78.2 to 83.3
72.3 to 78.4
Manganese (Mn), % 0 to 1.0
0 to 0.7
Molybdenum (Mo), % 0 to 0.75
0
Nickel (Ni), % 0
3.6 to 4.6
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0
0 to 0.050
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.030