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Grade 300 Maraging Steel vs. ACI-ASTM CF8M Steel

Both grade 300 maraging steel and ACI-ASTM CF8M steel are iron alloys. They have 79% 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 grade 300 maraging steel and the bottom bar is ACI-ASTM CF8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.5 to 18
50
Poisson's Ratio 0.3
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
540
Tensile Strength: Yield (Proof), MPa 760 to 1990
290

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Melting Completion (Liquidus), °C 1480
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 450
480
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 34
19
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 5.1
3.8
Embodied Energy, MJ/kg 68
53
Embodied Water, L/kg 150
160

Common Calculations

PREN (Pitting Resistance) 16
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
230
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 35 to 68
19
Strength to Weight: Bending, points 28 to 43
19
Thermal Shock Resistance, points 31 to 62
12

Alloy Composition

Aluminum (Al), % 0.050 to 0.15
0
Boron (B), % 0 to 0.0030
0
Calcium (Ca), % 0 to 0.050
0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 0
18 to 21
Cobalt (Co), % 8.5 to 9.5
0
Iron (Fe), % 65 to 68.4
60.3 to 71
Manganese (Mn), % 0 to 0.1
0 to 1.5
Molybdenum (Mo), % 4.6 to 5.2
2.0 to 3.0
Nickel (Ni), % 18 to 19
9.0 to 12
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.1
0 to 2.0
Sulfur (S), % 0 to 0.010
0 to 0.040
Titanium (Ti), % 0.5 to 0.8
0
Zirconium (Zr), % 0 to 0.020
0