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Grade 300 Maraging Steel vs. SAE-AISI A7 Steel

Both grade 300 maraging steel and SAE-AISI A7 steel are iron alloys. They have 68% of their average alloy composition in common. There are 20 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 grade 300 maraging steel and the bottom bar is SAE-AISI A7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.3
0.29
Shear Modulus, GPa 75
72
Tensile Strength: Ultimate (UTS), MPa 1030 to 2030
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1480
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 450
470
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 34
10
Density, g/cm3 8.2
7.7
Embodied Carbon, kg CO2/kg material 5.1
13
Embodied Energy, MJ/kg 68
200
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 16
11
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 35 to 68
29 to 77
Strength to Weight: Bending, points 28 to 43
25 to 48
Thermal Shock Resistance, points 31 to 62
27 to 72

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
2.0 to 2.9
Chromium (Cr), % 0
5.0 to 5.8
Cobalt (Co), % 8.5 to 9.5
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 65 to 68.4
81.4 to 87.7
Manganese (Mn), % 0 to 0.1
0 to 0.8
Molybdenum (Mo), % 4.6 to 5.2
0.9 to 1.4
Nickel (Ni), % 18 to 19
0 to 0.3
Phosphorus (P), % 0 to 0.010
0 to 0.030
Silicon (Si), % 0 to 0.1
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0.5 to 0.8
0
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2
Zirconium (Zr), % 0 to 0.020
0

Comparable Variants