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ACI-ASTM CN7M Steel vs. AISI 415 Stainless Steel

Both ACI-ASTM CN7M steel and AISI 415 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (3, 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 415 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 44
17
Fatigue Strength, MPa 190
430
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 480
900
Tensile Strength: Yield (Proof), MPa 200
700

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 430
390
Maximum Temperature: Mechanical, °C 1100
780
Melting Completion (Liquidus), °C 1410
1450
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 21
24
Thermal Expansion, µm/m-K 15
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
3.1

Otherwise Unclassified Properties

Base Metal Price, % relative 32
11
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.6
2.5
Embodied Energy, MJ/kg 78
35
Embodied Water, L/kg 210
110

Common Calculations

PREN (Pitting Resistance) 29
15
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
140
Resilience: Unit (Modulus of Resilience), kJ/m3 110
1250
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 17
32
Strength to Weight: Bending, points 17
26
Thermal Diffusivity, mm2/s 5.6
6.4
Thermal Shock Resistance, points 12
33

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 19 to 22
11.5 to 14
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
77.8 to 84
Manganese (Mn), % 0 to 1.5
0.5 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0.5 to 1.0
Nickel (Ni), % 27.5 to 30.5
3.5 to 5.5
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 1.5
0 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030