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EN 1.4903 Stainless Steel vs. ACI-ASTM CN7MS Steel

Both EN 1.4903 stainless steel and ACI-ASTM CN7MS steel are iron alloys. They have 60% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is EN 1.4903 stainless steel and the bottom bar is ACI-ASTM CN7MS steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 20 to 21
39
Fatigue Strength, MPa 320 to 330
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 670 to 680
540
Tensile Strength: Yield (Proof), MPa 500
230

Thermal Properties

Latent Heat of Fusion, J/g 270
340
Maximum Temperature: Corrosion, °C 380
420
Maximum Temperature: Mechanical, °C 650
1040
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 11
16

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
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 88
180

Common Calculations

PREN (Pitting Resistance) 13
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120 to 130
170
Resilience: Unit (Modulus of Resilience), kJ/m3 650
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
19
Strength to Weight: Bending, points 22
19
Thermal Diffusivity, mm2/s 7.0
3.2
Thermal Shock Resistance, points 23
13

Alloy Composition

Aluminum (Al), % 0 to 0.040
0
Carbon (C), % 0.080 to 0.12
0 to 0.070
Chromium (Cr), % 8.0 to 9.5
18 to 20
Copper (Cu), % 0 to 0.3
1.5 to 2.0
Iron (Fe), % 87.1 to 90.5
45.4 to 53.5
Manganese (Mn), % 0.3 to 0.6
0 to 1.0
Molybdenum (Mo), % 0.85 to 1.1
2.5 to 3.0
Nickel (Ni), % 0 to 0.4
22 to 25
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
2.5 to 3.5
Sulfur (S), % 0 to 0.015
0 to 0.030
Vanadium (V), % 0.18 to 0.25
0