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ACI-ASTM CA6N Steel vs. AISI 420 Stainless Steel

Both ACI-ASTM CA6N steel and AISI 420 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 31 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 CA6N steel and the bottom bar is AISI 420 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 17
8.0 to 15
Fatigue Strength, MPa 640
220 to 670
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
76
Tensile Strength: Ultimate (UTS), MPa 1080
690 to 1720
Tensile Strength: Yield (Proof), MPa 1060
380 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 280
280
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 740
620
Melting Completion (Liquidus), °C 1440
1510
Melting Onset (Solidus), °C 1400
1450
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 23
27
Thermal Expansion, µm/m-K 9.9
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
3.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
3.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
7.5
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.5
2.0
Embodied Energy, MJ/kg 35
28
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 12
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
88 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 2900
380 to 4410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 38
25 to 62
Strength to Weight: Bending, points 30
22 to 41
Thermal Diffusivity, mm2/s 6.1
7.3
Thermal Shock Resistance, points 40
25 to 62

Alloy Composition

Carbon (C), % 0 to 0.060
0.15 to 0.4
Chromium (Cr), % 10.5 to 12.5
12 to 14
Iron (Fe), % 77.9 to 83.5
82.3 to 87.9
Manganese (Mn), % 0 to 0.5
0 to 1.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 6.0 to 8.0
0 to 0.75
Phosphorus (P), % 0 to 0.020
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030