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ACI-ASTM CN7M Steel vs. S45500 Stainless Steel

Both ACI-ASTM CN7M steel and S45500 stainless steel are iron alloys. They have 66% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is S45500 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 140
280 to 500
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
3.4 to 11
Fatigue Strength, MPa 190
570 to 890
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 480
1370 to 1850
Tensile Strength: Yield (Proof), MPa 200
1240 to 1700

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Maximum Temperature: Corrosion, °C 430
620
Maximum Temperature: Mechanical, °C 1100
760
Melting Completion (Liquidus), °C 1410
1440
Melting Onset (Solidus), °C 1450
1400
Specific Heat Capacity, J/kg-K 470
470
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 32
17
Density, g/cm3 8.1
7.9
Embodied Carbon, kg CO2/kg material 5.6
3.8
Embodied Energy, MJ/kg 78
57
Embodied Water, L/kg 210
120

Common Calculations

PREN (Pitting Resistance) 29
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
45 to 190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
48 to 65
Strength to Weight: Bending, points 17
35 to 42
Thermal Shock Resistance, points 12
48 to 64

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.050
Chromium (Cr), % 19 to 22
11 to 12.5
Copper (Cu), % 3.0 to 4.0
1.5 to 2.5
Iron (Fe), % 37.4 to 48.5
71.5 to 79.2
Manganese (Mn), % 0 to 1.5
0 to 0.5
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 27.5 to 30.5
7.5 to 9.5
Niobium (Nb), % 0
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.5
0 to 0.5
Sulfur (S), % 0 to 0.040
0 to 0.030
Tantalum (Ta), % 0
0 to 0.5
Titanium (Ti), % 0
0.8 to 1.4