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SAE-AISI M4 Steel vs. Nickel 725

SAE-AISI M4 steel belongs to the iron alloys classification, while nickel 725 belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (13, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M4 steel and the bottom bar is nickel 725.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 770 to 2150
860

Thermal Properties

Latent Heat of Fusion, J/g 260
320
Melting Completion (Liquidus), °C 1610
1340
Melting Onset (Solidus), °C 1560
1270
Specific Heat Capacity, J/kg-K 440
440
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 25
75
Density, g/cm3 8.3
8.5
Embodied Carbon, kg CO2/kg material 14
13
Embodied Energy, MJ/kg 210
190
Embodied Water, L/kg 110
270

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 26 to 72
28
Strength to Weight: Bending, points 23 to 45
24
Thermal Shock Resistance, points 24 to 68
23

Alloy Composition

Aluminum (Al), % 0
0 to 0.35
Carbon (C), % 1.3 to 1.4
0 to 0.030
Chromium (Cr), % 3.8 to 4.8
19 to 22.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 75.9 to 81.4
2.3 to 15.3
Manganese (Mn), % 0.15 to 0.4
0 to 0.35
Molybdenum (Mo), % 4.3 to 5.5
7.0 to 9.5
Nickel (Ni), % 0 to 0.3
55 to 59
Niobium (Nb), % 0
2.8 to 4.0
Phosphorus (P), % 0 to 0.030
0 to 0.015
Silicon (Si), % 0.2 to 0.45
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
1.0 to 1.7
Tungsten (W), % 5.3 to 6.5
0
Vanadium (V), % 3.8 to 4.5
0