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SAE-AISI M3 Class 2 Steel vs. Grade 300 Maraging Steel

Both SAE-AISI M3 class 2 steel and grade 300 maraging steel are iron alloys. They have 72% 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 M3 class 2 steel and the bottom bar is grade 300 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 77
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2210
1030 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1620
1480
Melting Onset (Solidus), °C 1570
1430
Specific Heat Capacity, J/kg-K 440
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
34
Density, g/cm3 8.3
8.2
Embodied Carbon, kg CO2/kg material 12
5.1
Embodied Energy, MJ/kg 180
68
Embodied Water, L/kg 110
150

Common Calculations

PREN (Pitting Resistance) 33
16
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26 to 74
35 to 68
Strength to Weight: Bending, points 22 to 45
28 to 43
Thermal Shock Resistance, points 24 to 69
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), % 1.2 to 1.3
0 to 0.030
Chromium (Cr), % 3.8 to 4.5
0
Cobalt (Co), % 0
8.5 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.8 to 82.3
65 to 68.4
Manganese (Mn), % 0.15 to 0.4
0 to 0.1
Molybdenum (Mo), % 4.8 to 6.5
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), % 0.2 to 0.45
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0.5 to 0.8
Tungsten (W), % 5.0 to 6.8
0
Vanadium (V), % 2.8 to 3.8
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants