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SAE-AISI O7 Steel vs. Grade 200 Maraging Steel

Both SAE-AISI O7 steel and grade 200 maraging steel are iron alloys. They have 70% of their average alloy composition in common. There are 20 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI O7 steel and the bottom bar is grade 200 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 73
74
Tensile Strength: Ultimate (UTS), MPa 680 to 2110
970 to 1500

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1480
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
460
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
31
Density, g/cm3 7.9
8.2
Embodied Carbon, kg CO2/kg material 2.3
4.5
Embodied Energy, MJ/kg 33
59
Embodied Water, L/kg 52
140

Common Calculations

PREN (Pitting Resistance) 3.6
11
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 24 to 74
33 to 51
Strength to Weight: Bending, points 22 to 46
27 to 35
Thermal Shock Resistance, points 23 to 70
29 to 45

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), % 1.1 to 1.3
0 to 0.030
Chromium (Cr), % 0.35 to 0.85
0
Cobalt (Co), % 0
8.0 to 9.0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 92.9 to 97.6
67.8 to 71.8
Manganese (Mn), % 0 to 1.0
0 to 0.1
Molybdenum (Mo), % 0 to 0.3
3.0 to 3.5
Nickel (Ni), % 0 to 0.3
17 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
0.15 to 0.25
Tungsten (W), % 1.0 to 2.0
0
Vanadium (V), % 0 to 0.4
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants