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ACI-ASTM CN7MS Steel vs. S45500 Stainless Steel

Both ACI-ASTM CN7MS steel and S45500 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7MS steel and the bottom bar is S45500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
280 to 500
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
3.4 to 11
Fatigue Strength, MPa 200
570 to 890
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 540
1370 to 1850
Tensile Strength: Yield (Proof), MPa 230
1240 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 340
270
Maximum Temperature: Corrosion, °C 420
620
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
470
Thermal Expansion, µm/m-K 16
11

Otherwise Unclassified Properties

Base Metal Price, % relative 28
17
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 5.1
3.8
Embodied Energy, MJ/kg 71
57
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 28
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
45 to 190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
48 to 65
Strength to Weight: Bending, points 19
35 to 42
Thermal Shock Resistance, points 13
48 to 64

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 18 to 20
11 to 12.5
Copper (Cu), % 1.5 to 2.0
1.5 to 2.5
Iron (Fe), % 45.4 to 53.5
71.5 to 79.2
Manganese (Mn), % 0 to 1.0
0 to 0.5
Molybdenum (Mo), % 2.5 to 3.0
0 to 0.5
Nickel (Ni), % 22 to 25
7.5 to 9.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 2.5 to 3.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0.8 to 1.4