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EN 1.4374 Stainless Steel vs. ACI-ASTM CN7MS Steel

Both EN 1.4374 stainless steel and ACI-ASTM CN7MS steel are iron alloys. They have 74% 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 1.4374 stainless steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
39
Fatigue Strength, MPa 340
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
77
Tensile Strength: Ultimate (UTS), MPa 800
540
Tensile Strength: Yield (Proof), MPa 400
230

Thermal Properties

Latent Heat of Fusion, J/g 290
340
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 920
1040
Melting Completion (Liquidus), °C 1400
1400
Melting Onset (Solidus), °C 1360
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 17
16

Otherwise Unclassified Properties

Base Metal Price, % relative 14
28
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.9
5.1
Embodied Energy, MJ/kg 42
71
Embodied Water, L/kg 150
180

Common Calculations

PREN (Pitting Resistance) 23
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
170
Resilience: Unit (Modulus of Resilience), kJ/m3 400
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29
19
Strength to Weight: Bending, points 25
19
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 17
13

Alloy Composition

Carbon (C), % 0.050 to 0.1
0 to 0.070
Chromium (Cr), % 17.5 to 18.5
18 to 20
Copper (Cu), % 0 to 0.4
1.5 to 2.0
Iron (Fe), % 63.5 to 67.9
45.4 to 53.5
Manganese (Mn), % 9.0 to 10
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
2.5 to 3.0
Nickel (Ni), % 5.0 to 6.0
22 to 25
Nitrogen (N), % 0.25 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0.3 to 0.6
2.5 to 3.5
Sulfur (S), % 0 to 0.030
0 to 0.030