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AISI 420 Stainless Steel vs. ACI-ASTM CB7Cu-1 Steel

Both AISI 420 stainless steel and ACI-ASTM CB7Cu-1 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 (5, in this case) are not shown.

For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
300 to 420
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 8.0 to 15
5.7 to 11
Fatigue Strength, MPa 220 to 670
420 to 590
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
960 to 1350
Tensile Strength: Yield (Proof), MPa 380 to 1310
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Melting Completion (Liquidus), °C 1510
1430
Melting Onset (Solidus), °C 1450
1500
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
2.6
Embodied Energy, MJ/kg 28
38
Embodied Water, L/kg 100
130

Common Calculations

PREN (Pitting Resistance) 14
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
1500 to 3590
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
34 to 48
Strength to Weight: Bending, points 22 to 41
28 to 35
Thermal Diffusivity, mm2/s 7.3
4.6
Thermal Shock Resistance, points 25 to 62
32 to 45

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.070
Chromium (Cr), % 12 to 14
15.5 to 17.7
Copper (Cu), % 0
2.5 to 3.2
Iron (Fe), % 82.3 to 87.9
72.3 to 78.4
Manganese (Mn), % 0 to 1.0
0 to 0.7
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0 to 0.75
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 0.030
0 to 0.030