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ACI-ASTM CB7Cu-2 Steel vs. AISI 304 Stainless Steel

Both ACI-ASTM CB7Cu-2 steel and AISI 304 stainless steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, 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 AISI 304 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 300 to 420
170 to 360
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 5.7 to 11
8.0 to 43
Fatigue Strength, MPa 420 to 590
210 to 440
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 960 to 1350
580 to 1180
Tensile Strength: Yield (Proof), MPa 760 to 1180
230 to 860

Thermal Properties

Latent Heat of Fusion, J/g 280
290
Melting Completion (Liquidus), °C 1430
1450
Melting Onset (Solidus), °C 1380
1400
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
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 13
15
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.6
3.0
Embodied Energy, MJ/kg 38
43
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 15
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 120
86 to 250
Resilience: Unit (Modulus of Resilience), kJ/m3 1510 to 3600
140 to 1870
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 34 to 48
21 to 42
Strength to Weight: Bending, points 28 to 35
20 to 32
Thermal Diffusivity, mm2/s 4.6
4.2
Thermal Shock Resistance, points 32 to 45
12 to 25

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.080
Chromium (Cr), % 14 to 15.5
18 to 20
Copper (Cu), % 2.5 to 3.2
0
Iron (Fe), % 73.6 to 79
66.5 to 74
Manganese (Mn), % 0 to 0.7
0 to 2.0
Nickel (Ni), % 4.5 to 5.5
8.0 to 10.5
Niobium (Nb), % 0 to 0.35
0
Nitrogen (N), % 0 to 0.050
0 to 0.1
Phosphorus (P), % 0 to 0.035
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030