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SAE-AISI T8 Steel vs. Grade 250 Maraging Steel

Both SAE-AISI T8 steel and grade 250 maraging steel are iron alloys. They have 75% 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 T8 steel and the bottom bar is grade 250 maraging steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 78
75
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
970 to 1800

Thermal Properties

Latent Heat of Fusion, J/g 250
270
Melting Completion (Liquidus), °C 1730
1480
Melting Onset (Solidus), °C 1670
1430
Specific Heat Capacity, J/kg-K 420
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 45
32
Density, g/cm3 9.0
8.2
Embodied Carbon, kg CO2/kg material 10
4.9
Embodied Energy, MJ/kg 160
65
Embodied Water, L/kg 120
140

Common Calculations

PREN (Pitting Resistance) 30
16
Stiffness to Weight: Axial, points 12
13
Stiffness to Weight: Bending, points 22
23
Strength to Weight: Axial, points 24 to 66
33 to 61
Strength to Weight: Bending, points 21 to 41
26 to 40
Thermal Shock Resistance, points 24 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), % 0.75 to 0.85
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 4.3 to 5.8
7.0 to 8.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 69.3 to 75.4
66.3 to 71.1
Manganese (Mn), % 0.2 to 0.4
0 to 0.1
Molybdenum (Mo), % 0.4 to 1.0
4.6 to 5.2
Nickel (Ni), % 0 to 0.3
17 to 19
Phosphorus (P), % 0 to 0.030
0 to 0.010
Silicon (Si), % 0.2 to 0.4
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.3 to 0.5
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants