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ACI-ASTM CN7M Steel vs. Grade 350 Maraging Steel

Both ACI-ASTM CN7M steel and grade 350 maraging steel are iron alloys. They have 64% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CN7M steel and the bottom bar is grade 350 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 44
4.1 to 18
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 77
75
Tensile Strength: Ultimate (UTS), MPa 480
1140 to 2420
Tensile Strength: Yield (Proof), MPa 200
830 to 2300

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Melting Completion (Liquidus), °C 1410
1470
Melting Onset (Solidus), °C 1450
1420
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 32
39
Density, g/cm3 8.1
8.2
Embodied Carbon, kg CO2/kg material 5.6
5.6
Embodied Energy, MJ/kg 78
74
Embodied Water, L/kg 210
160

Common Calculations

PREN (Pitting Resistance) 29
16
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
98 to 190
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 17
38 to 82
Strength to Weight: Bending, points 17
29 to 49
Thermal Shock Resistance, points 12
35 to 74

Alloy Composition

Aluminum (Al), % 0
0.050 to 0.15
Boron (B), % 0
0 to 0.0030
Calcium (Ca), % 0
0 to 0.050
Carbon (C), % 0 to 0.070
0 to 0.030
Chromium (Cr), % 19 to 22
0
Cobalt (Co), % 0
11.5 to 12.5
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 37.4 to 48.5
61.2 to 64.6
Manganese (Mn), % 0 to 1.5
0 to 0.1
Molybdenum (Mo), % 2.0 to 3.0
4.6 to 5.2
Nickel (Ni), % 27.5 to 30.5
18 to 19
Phosphorus (P), % 0 to 0.040
0 to 0.010
Silicon (Si), % 0 to 1.5
0 to 0.1
Sulfur (S), % 0 to 0.040
0 to 0.010
Titanium (Ti), % 0
1.3 to 1.6
Zirconium (Zr), % 0
0 to 0.020