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ACI-ASTM CD6MN Steel vs. AISI 446 Stainless Steel

Both ACI-ASTM CD6MN steel and AISI 446 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 (5, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD6MN steel and the bottom bar is AISI 446 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 28
23
Fatigue Strength, MPa 370
200
Poisson's Ratio 0.27
0.27
Shear Modulus, GPa 80
79
Tensile Strength: Ultimate (UTS), MPa 730
570
Tensile Strength: Yield (Proof), MPa 510
300

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 450
440
Maximum Temperature: Mechanical, °C 1100
1180
Melting Completion (Liquidus), °C 1440
1510
Melting Onset (Solidus), °C 1390
1430
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 16
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
12
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 3.4
2.4
Embodied Energy, MJ/kg 48
35
Embodied Water, L/kg 170
150

Common Calculations

PREN (Pitting Resistance) 36
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
110
Resilience: Unit (Modulus of Resilience), kJ/m3 650
230
Stiffness to Weight: Axial, points 15
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 26
21
Strength to Weight: Bending, points 23
20
Thermal Diffusivity, mm2/s 4.4
4.6
Thermal Shock Resistance, points 20
19

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.2
Chromium (Cr), % 24 to 27
23 to 27
Iron (Fe), % 62.1 to 70.1
69.2 to 77
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 4.0 to 6.0
0 to 0.75
Nitrogen (N), % 0.15 to 0.25
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030