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ACI-ASTM CN7MS Steel vs. EN 1.4401 Stainless Steel

Both ACI-ASTM CN7MS steel and EN 1.4401 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 (4, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is EN 1.4401 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190 to 270
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
14 to 40
Fatigue Strength, MPa 200
200 to 320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 540
600 to 900
Tensile Strength: Yield (Proof), MPa 230
230 to 570

Thermal Properties

Latent Heat of Fusion, J/g 340
290
Maximum Temperature: Corrosion, °C 420
410
Maximum Temperature: Mechanical, °C 1040
950
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
3.8
Embodied Energy, MJ/kg 71
52
Embodied Water, L/kg 180
150

Common Calculations

PREN (Pitting Resistance) 28
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
110 to 190
Resilience: Unit (Modulus of Resilience), kJ/m3 140
130 to 800
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
21 to 32
Strength to Weight: Bending, points 19
20 to 26
Thermal Diffusivity, mm2/s 3.2
4.0
Thermal Shock Resistance, points 13
13 to 20

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.070
Chromium (Cr), % 18 to 20
16.5 to 18.5
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
62.8 to 71.5
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.0
2.0 to 2.5
Nickel (Ni), % 22 to 25
10 to 13
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 2.5 to 3.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015