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ACI-ASTM CN7M Steel vs. AISI 409Cb Stainless Steel

Both ACI-ASTM CN7M steel and AISI 409Cb stainless steel are iron alloys. They have 55% of their average alloy composition in common. There are 31 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 ACI-ASTM CN7M steel and the bottom bar is AISI 409Cb stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
24
Fatigue Strength, MPa 190
140
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 480
420
Tensile Strength: Yield (Proof), MPa 200
200

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 430
440
Maximum Temperature: Mechanical, °C 1100
710
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1450
1410
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 21
25
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 32
8.5
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.6
2.2
Embodied Energy, MJ/kg 78
31
Embodied Water, L/kg 210
94

Common Calculations

PREN (Pitting Resistance) 29
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
83
Resilience: Unit (Modulus of Resilience), kJ/m3 110
100
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
15
Strength to Weight: Bending, points 17
16
Thermal Diffusivity, mm2/s 5.6
6.7
Thermal Shock Resistance, points 12
15

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.060
Chromium (Cr), % 19 to 22
10.5 to 11.7
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
84.9 to 89.5
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0
Nickel (Ni), % 27.5 to 30.5
0 to 0.5
Niobium (Nb), % 0
0 to 0.75
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.040