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AISI 420 Stainless Steel vs. ACI-ASTM CD3MCuN Steel

Both AISI 420 stainless steel and ACI-ASTM CD3MCuN steel are iron alloys. They have 77% of their average alloy composition in common. There are 31 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 AISI 420 stainless steel and the bottom bar is ACI-ASTM CD3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
29
Fatigue Strength, MPa 220 to 670
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
790
Tensile Strength: Yield (Proof), MPa 380 to 1310
500

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
450
Maximum Temperature: Mechanical, °C 620
1100
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
15
Thermal Expansion, µm/m-K 10
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
20
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.9
Embodied Energy, MJ/kg 28
54
Embodied Water, L/kg 100
180

Common Calculations

PREN (Pitting Resistance) 14
41
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
200
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
620
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 62
28
Strength to Weight: Bending, points 22 to 41
24
Thermal Diffusivity, mm2/s 7.3
4.1
Thermal Shock Resistance, points 25 to 62
22

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.030
Chromium (Cr), % 12 to 14
24 to 26.7
Copper (Cu), % 0
1.4 to 1.9
Iron (Fe), % 82.3 to 87.9
58.2 to 65.9
Manganese (Mn), % 0 to 1.0
0 to 1.2
Molybdenum (Mo), % 0 to 0.5
2.9 to 3.8
Nickel (Ni), % 0 to 0.75
5.6 to 6.7
Nitrogen (N), % 0
0.22 to 0.33
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 1.1
Sulfur (S), % 0 to 0.030
0 to 0.030