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EN 1.3956 Stainless Steel vs. ACI-ASTM CN7MS Steel

Both EN 1.3956 stainless steel and ACI-ASTM CN7MS steel are iron alloys. They have 84% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.3956 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, % 27
39
Fatigue Strength, MPa 240
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
77
Tensile Strength: Ultimate (UTS), MPa 650
540
Tensile Strength: Yield (Proof), MPa 330
230

Thermal Properties

Latent Heat of Fusion, J/g 300
340
Maximum Temperature: Corrosion, °C 460
420
Maximum Temperature: Mechanical, °C 1080
1040
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 13
16

Otherwise Unclassified Properties

Base Metal Price, % relative 22
28
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.8
5.1
Embodied Energy, MJ/kg 68
71
Embodied Water, L/kg 180
180

Common Calculations

PREN (Pitting Resistance) 34
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150
170
Resilience: Unit (Modulus of Resilience), kJ/m3 270
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 23
19
Strength to Weight: Bending, points 21
19
Thermal Shock Resistance, points 18
13

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.070
Chromium (Cr), % 20.5 to 23.5
18 to 20
Copper (Cu), % 0
1.5 to 2.0
Iron (Fe), % 51.9 to 62.1
45.4 to 53.5
Manganese (Mn), % 4.0 to 6.0
0 to 1.0
Molybdenum (Mo), % 1.5 to 3.0
2.5 to 3.0
Nickel (Ni), % 11.5 to 13.5
22 to 25
Niobium (Nb), % 0.1 to 0.3
0
Nitrogen (N), % 0.2 to 0.4
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
2.5 to 3.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.1 to 0.3
0