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ACI-ASTM CN7MS Steel vs. AISI 316N Stainless Steel

Both ACI-ASTM CN7MS steel and AISI 316N stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 30 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 CN7MS steel and the bottom bar is AISI 316N stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190 to 350
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
9.0 to 39
Fatigue Strength, MPa 200
230 to 450
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 540
620 to 1160
Tensile Strength: Yield (Proof), MPa 230
270 to 870

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1040
940
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 12
15
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 28
19
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 5.1
3.9
Embodied Energy, MJ/kg 71
53
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 28
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
95 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 140
180 to 1880
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
22 to 41
Strength to Weight: Bending, points 19
20 to 31
Thermal Diffusivity, mm2/s 3.2
4.1
Thermal Shock Resistance, points 13
14 to 26

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.080
Chromium (Cr), % 18 to 20
16 to 18
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
61.9 to 71.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.0
2.0 to 3.0
Nickel (Ni), % 22 to 25
10 to 14
Nitrogen (N), % 0
0.1 to 0.16
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 2.5 to 3.5
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030