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EN 1.4401 Stainless Steel vs. ACI-ASTM CN7MS Steel

Both EN 1.4401 stainless steel and ACI-ASTM CN7MS 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 EN 1.4401 stainless steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 950
1040
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 19
28
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 3.8
5.1
Embodied Energy, MJ/kg 52
71
Embodied Water, L/kg 150
180

Common Calculations

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

Alloy Composition

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