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SAE-AISI D7 Steel vs. Grade 350 Maraging Steel

Both SAE-AISI D7 steel and grade 350 maraging steel are iron alloys. They have 64% 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 SAE-AISI D7 steel and the bottom bar is grade 350 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.28
0.3
Shear Modulus, GPa 73
75
Tensile Strength: Ultimate (UTS), MPa 800 to 2120
1140 to 2420

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
450
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 10
39
Density, g/cm3 7.6
8.2
Embodied Carbon, kg CO2/kg material 11
5.6
Embodied Energy, MJ/kg 180
74
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 16
16
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 29 to 78
38 to 82
Strength to Weight: Bending, points 25 to 48
29 to 49
Thermal Shock Resistance, points 27 to 72
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), % 2.2 to 2.5
0 to 0.030
Chromium (Cr), % 11.5 to 13.5
0
Cobalt (Co), % 0
11.5 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 76.6 to 81.9
61.2 to 64.6
Manganese (Mn), % 0 to 0.6
0 to 0.1
Molybdenum (Mo), % 0.7 to 1.2
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 to 0.6
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.3 to 1.6
Vanadium (V), % 3.8 to 4.4
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants