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SAE-AISI M4 Steel vs. Grade 350 Maraging Steel

Both SAE-AISI M4 steel and grade 350 maraging steel are iron alloys. They have 68% 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 M4 steel and the bottom bar is grade 350 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 76
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
1140 to 2420

Thermal Properties

Latent Heat of Fusion, J/g 260
270
Melting Completion (Liquidus), °C 1610
1470
Melting Onset (Solidus), °C 1560
1420
Specific Heat Capacity, J/kg-K 440
450
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 25
39
Density, g/cm3 8.3
8.2
Embodied Carbon, kg CO2/kg material 14
5.6
Embodied Energy, MJ/kg 210
74
Embodied Water, L/kg 110
160

Common Calculations

PREN (Pitting Resistance) 30
16
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26 to 72
38 to 82
Strength to Weight: Bending, points 23 to 45
29 to 49
Thermal Shock Resistance, points 24 to 68
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), % 1.3 to 1.4
0 to 0.030
Chromium (Cr), % 3.8 to 4.8
0
Cobalt (Co), % 0
11.5 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
61.2 to 64.6
Manganese (Mn), % 0.15 to 0.4
0 to 0.1
Molybdenum (Mo), % 4.3 to 5.5
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
1.3 to 1.6
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0
Zirconium (Zr), % 0
0 to 0.020

Comparable Variants