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AISI 420 Stainless Steel vs. ACI-ASTM CN3MN Steel

Both AISI 420 stainless steel and ACI-ASTM CN3MN steel are iron alloys. They have 61% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, 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 CN3MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
180
Elastic (Young's, Tensile) Modulus, GPa 190
210
Elongation at Break, % 8.0 to 15
39
Fatigue Strength, MPa 220 to 670
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
620
Tensile Strength: Yield (Proof), MPa 380 to 1310
300

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 390
430
Maximum Temperature: Mechanical, °C 620
1100
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 27
13
Thermal Expansion, µm/m-K 10
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
33
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.0
6.2
Embodied Energy, MJ/kg 28
84
Embodied Water, L/kg 100
200

Common Calculations

PREN (Pitting Resistance) 14
46
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
200
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 62
21
Strength to Weight: Bending, points 22 to 41
20
Thermal Diffusivity, mm2/s 7.3
3.4
Thermal Shock Resistance, points 25 to 62
14

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.030
Chromium (Cr), % 12 to 14
20 to 22
Copper (Cu), % 0
0 to 0.75
Iron (Fe), % 82.3 to 87.9
41.4 to 50.3
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
6.0 to 7.0
Nickel (Ni), % 0 to 0.75
23.5 to 25.5
Nitrogen (N), % 0
0.18 to 0.26
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010