MakeItFrom.com
Menu (ESC)

Nickel 725 vs. SAE-AISI M7 Steel

Nickel 725 belongs to the nickel alloys classification, while SAE-AISI M7 steel belongs to the iron alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. 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 nickel 725 and the bottom bar is SAE-AISI M7 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 860
760 to 2210

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Melting Completion (Liquidus), °C 1340
1560
Melting Onset (Solidus), °C 1270
1510
Specific Heat Capacity, J/kg-K 440
450
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 75
18
Density, g/cm3 8.5
8.1
Embodied Carbon, kg CO2/kg material 13
8.9
Embodied Energy, MJ/kg 190
130
Embodied Water, L/kg 270
100

Common Calculations

Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28
26 to 76
Strength to Weight: Bending, points 24
23 to 47
Thermal Shock Resistance, points 23
24 to 69

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
1.0 to 1.1
Chromium (Cr), % 19 to 22.5
3.5 to 4.0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 2.3 to 15.3
79.8 to 83.8
Manganese (Mn), % 0 to 0.35
0.15 to 0.4
Molybdenum (Mo), % 7.0 to 9.5
8.2 to 9.2
Nickel (Ni), % 55 to 59
0 to 0.3
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0 to 0.030
Silicon (Si), % 0 to 0.2
0.2 to 0.55
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0
Tungsten (W), % 0
1.4 to 2.1
Vanadium (V), % 0
1.8 to 2.3