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EN 1.4421 Stainless Steel vs. ACI-ASTM CN7MS Steel

Both EN 1.4421 stainless steel and ACI-ASTM CN7MS steel are iron alloys. They have 72% 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 EN 1.4421 stainless steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 17
39
Fatigue Strength, MPa 380 to 520
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 880 to 1100
540
Tensile Strength: Yield (Proof), MPa 620 to 950
230

Thermal Properties

Latent Heat of Fusion, J/g 280
340
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 870
1040
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1400
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
12
Thermal Expansion, µm/m-K 10
16

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.6
5.1
Embodied Energy, MJ/kg 36
71
Embodied Water, L/kg 130
180

Common Calculations

PREN (Pitting Resistance) 18
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 140
170
Resilience: Unit (Modulus of Resilience), kJ/m3 960 to 2270
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
19
Strength to Weight: Bending, points 26 to 30
19
Thermal Diffusivity, mm2/s 4.4
3.2
Thermal Shock Resistance, points 31 to 39
13

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.070
Chromium (Cr), % 15.5 to 17.5
18 to 20
Copper (Cu), % 0
1.5 to 2.0
Iron (Fe), % 74.4 to 80.5
45.4 to 53.5
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0 to 0.7
2.5 to 3.0
Nickel (Ni), % 4.0 to 5.5
22 to 25
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.8
2.5 to 3.5
Sulfur (S), % 0 to 0.020
0 to 0.030