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ACI-ASTM CN7MS Steel vs. EN 1.4021 Stainless Steel

Both ACI-ASTM CN7MS steel and EN 1.4021 stainless steel are iron alloys. They have 64% 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 1.4021 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
11 to 17
Fatigue Strength, MPa 200
240 to 380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 540
630 to 880
Tensile Strength: Yield (Proof), MPa 230
390 to 670

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Maximum Temperature: Corrosion, °C 420
390
Maximum Temperature: Mechanical, °C 1040
760
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
30
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 28
7.0
Density, g/cm3 7.9
7.7
Embodied Carbon, kg CO2/kg material 5.1
1.9
Embodied Energy, MJ/kg 71
27
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 28
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
88 to 110
Resilience: Unit (Modulus of Resilience), kJ/m3 140
400 to 1160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
23 to 31
Strength to Weight: Bending, points 19
21 to 26
Thermal Diffusivity, mm2/s 3.2
8.1
Thermal Shock Resistance, points 13
22 to 31

Alloy Composition

Carbon (C), % 0 to 0.070
0.16 to 0.25
Chromium (Cr), % 18 to 20
12 to 14
Copper (Cu), % 1.5 to 2.0
0
Iron (Fe), % 45.4 to 53.5
83.2 to 87.8
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 2.5 to 3.0
0
Nickel (Ni), % 22 to 25
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 2.5 to 3.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015