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SAE-AISI S7 Steel vs. Grade 250 Maraging Steel

Both SAE-AISI S7 steel and grade 250 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 (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI S7 steel and the bottom bar is grade 250 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 670 to 2030
970 to 1800

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 5.0
32
Density, g/cm3 7.8
8.2
Embodied Carbon, kg CO2/kg material 2.3
4.9
Embodied Energy, MJ/kg 31
65
Embodied Water, L/kg 65
140

Common Calculations

PREN (Pitting Resistance) 8.4
16
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
23
Strength to Weight: Axial, points 24 to 72
33 to 61
Strength to Weight: Bending, points 22 to 46
26 to 40
Thermal Shock Resistance, points 22 to 66
29 to 54

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), % 0.45 to 0.55
0 to 0.030
Chromium (Cr), % 3.0 to 3.5
0
Cobalt (Co), % 0
7.0 to 8.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 91.6 to 94.9
66.3 to 71.1
Manganese (Mn), % 0.2 to 0.9
0 to 0.1
Molybdenum (Mo), % 1.3 to 1.8
4.6 to 5.2
Nickel (Ni), % 0
17 to 19
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0.2 to 1.0
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Vanadium (V), % 0 to 0.3
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants