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ACI-ASTM CN7M Steel vs. AISI 405 Stainless Steel

Both ACI-ASTM CN7M steel and AISI 405 stainless steel are iron alloys. They have 57% of their average alloy composition in common. There are 32 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 CN7M steel and the bottom bar is AISI 405 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
170
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
22
Fatigue Strength, MPa 190
130
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 480
470
Tensile Strength: Yield (Proof), MPa 200
200

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 430
390
Maximum Temperature: Mechanical, °C 1100
820
Melting Completion (Liquidus), °C 1410
1530
Melting Onset (Solidus), °C 1450
1480
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 21
30
Thermal Expansion, µm/m-K 15
11

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
7.0
Density, g/cm3 8.1
7.7
Embodied Carbon, kg CO2/kg material 5.6
2.0
Embodied Energy, MJ/kg 78
28
Embodied Water, L/kg 210
100

Common Calculations

PREN (Pitting Resistance) 29
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
84
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
17
Strength to Weight: Bending, points 17
17
Thermal Diffusivity, mm2/s 5.6
8.1
Thermal Shock Resistance, points 12
16

Alloy Composition

Aluminum (Al), % 0
0.1 to 0.3
Carbon (C), % 0 to 0.070
0 to 0.080
Chromium (Cr), % 19 to 22
11.5 to 14.5
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
82.5 to 88.4
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 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030