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SAE-AISI M2 Steel vs. AWS BNi-7

SAE-AISI M2 steel belongs to the iron alloys classification, while AWS BNi-7 belongs to the nickel alloys. There are 19 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M2 steel and the bottom bar is AWS BNi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
170
Poisson's Ratio 0.29
0.3
Shear Modulus, GPa 77
67
Tensile Strength: Ultimate (UTS), MPa 760 to 2150
550

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1610
890
Melting Onset (Solidus), °C 1570
890
Specific Heat Capacity, J/kg-K 440
490
Thermal Expansion, µm/m-K 10
11

Otherwise Unclassified Properties

Base Metal Price, % relative 24
55
Density, g/cm3 8.4
8.0
Embodied Carbon, kg CO2/kg material 8.8
8.8
Embodied Energy, MJ/kg 130
120
Embodied Water, L/kg 98
240

Common Calculations

Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 23
23
Strength to Weight: Axial, points 25 to 71
19
Strength to Weight: Bending, points 22 to 44
19
Thermal Shock Resistance, points 27 to 76
21

Alloy Composition


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Aluminum (Al), % 0
0 to 0.050
Boron (B), % 0
0 to 0.010
Carbon (C), % 0.78 to 1.1
0 to 0.060
Chromium (Cr), % 3.8 to 4.5
13 to 15
Cobalt (Co), % 0
0 to 0.1
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 78.5 to 83.4
0 to 0.2
Manganese (Mn), % 0.15 to 0.4
0 to 0.040
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0 to 0.3
73.3 to 77.3
Phosphorus (P), % 0 to 0.030
9.7 to 10.5
Selenium (Se), % 0
0 to 0.0050
Silicon (Si), % 0.2 to 0.45
0 to 0.1
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0 to 0.050
Tungsten (W), % 5.5 to 6.8
0
Vanadium (V), % 1.8 to 2.2
0
Zirconium (Zr), % 0
0 to 0.050
Residuals, % 0
0 to 0.5