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ACI-ASTM CN7MS Steel vs. EN 1.4470 Stainless Steel

Both ACI-ASTM CN7MS steel and EN 1.4470 stainless steel are iron alloys. They have 78% of their average alloy composition in common. There are 29 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 1.4470 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 39
23
Fatigue Strength, MPa 200
320
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 540
680
Tensile Strength: Yield (Proof), MPa 230
480

Thermal Properties

Latent Heat of Fusion, J/g 340
300
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 1040
1060
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
18
Thermal Expansion, µm/m-K 16
13

Otherwise Unclassified Properties

Base Metal Price, % relative 28
17
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 5.1
3.6
Embodied Energy, MJ/kg 71
49
Embodied Water, L/kg 180
160

Common Calculations

PREN (Pitting Resistance) 28
34
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
140
Resilience: Unit (Modulus of Resilience), kJ/m3 140
570
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
24
Strength to Weight: Bending, points 19
22
Thermal Diffusivity, mm2/s 3.2
4.8
Thermal Shock Resistance, points 13
18

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 18 to 20
21 to 23
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
63.7 to 71.9
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 2.5 to 3.0
2.5 to 3.5
Nickel (Ni), % 22 to 25
4.5 to 6.5
Nitrogen (N), % 0
0.12 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 2.5 to 3.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.025