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Grade 300 Maraging Steel vs. SAE-AISI 1140 Steel

Both grade 300 maraging steel and SAE-AISI 1140 steel are iron alloys. They have 67% 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 SAE-AISI 1140 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 6.5 to 18
14 to 18
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 75
72
Shear Strength, MPa 640 to 1190
370 to 420
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
600 to 700
Tensile Strength: Yield (Proof), MPa 760 to 1990
340 to 570

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 34
1.8
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 5.1
1.4
Embodied Energy, MJ/kg 68
18
Embodied Water, L/kg 150
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130 to 170
89 to 93
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 35 to 68
21 to 25
Strength to Weight: Bending, points 28 to 43
20 to 22
Thermal Shock Resistance, points 31 to 62
18 to 21

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
0.37 to 0.44
Cobalt (Co), % 8.5 to 9.5
0
Iron (Fe), % 65 to 68.4
98.4 to 98.9
Manganese (Mn), % 0 to 0.1
0.7 to 1.0
Molybdenum (Mo), % 4.6 to 5.2
0
Nickel (Ni), % 18 to 19
0
Phosphorus (P), % 0 to 0.010
0 to 0.040
Silicon (Si), % 0 to 0.1
0
Sulfur (S), % 0 to 0.010
0.080 to 0.13
Titanium (Ti), % 0.5 to 0.8
0
Zirconium (Zr), % 0 to 0.020
0