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SAE-AISI A8 Steel vs. Grade 300 Maraging Steel

Both SAE-AISI A8 steel and grade 300 maraging 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 (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A8 steel and the bottom bar is grade 300 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 74
75
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
1030 to 2030

Thermal Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
34
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 2.3
5.1
Embodied Energy, MJ/kg 31
68
Embodied Water, L/kg 73
150

Common Calculations

PREN (Pitting Resistance) 12
16
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 25 to 68
35 to 68
Strength to Weight: Bending, points 22 to 44
28 to 43
Thermal Shock Resistance, points 22 to 62
31 to 62

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), % 0.5 to 0.6
0 to 0.030
Chromium (Cr), % 4.8 to 5.5
0
Cobalt (Co), % 0
8.5 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.5 to 91.9
65 to 68.4
Manganese (Mn), % 0 to 0.5
0 to 0.1
Molybdenum (Mo), % 1.2 to 1.7
4.6 to 5.2
Nickel (Ni), % 0 to 0.3
18 to 19
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0.75 to 1.1
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.5 to 0.8
Tungsten (W), % 1.0 to 1.5
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants