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SAE-AISI M6 Steel vs. SAE-AISI P6 Steel

Both SAE-AISI M6 steel and SAE-AISI P6 steel are iron alloys. They have 74% of their average alloy composition in common. There are 21 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M6 steel and the bottom bar is SAE-AISI P6 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
73
Tensile Strength: Ultimate (UTS), MPa 840 to 2210
630 to 1930

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1560
1460
Melting Onset (Solidus), °C 1510
1420
Specific Heat Capacity, J/kg-K 440
470
Thermal Conductivity, W/m-K 17
43
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 39
4.6
Density, g/cm3 8.4
7.9
Embodied Carbon, kg CO2/kg material 8.0
1.8
Embodied Energy, MJ/kg 120
24
Embodied Water, L/kg 160
59

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 23
24
Strength to Weight: Axial, points 28 to 73
22 to 68
Strength to Weight: Bending, points 24 to 45
21 to 44
Thermal Diffusivity, mm2/s 4.7
11
Thermal Shock Resistance, points 26 to 68
21 to 63

Alloy Composition

Carbon (C), % 0.75 to 0.85
0.050 to 0.15
Chromium (Cr), % 3.8 to 4.5
1.3 to 1.8
Cobalt (Co), % 11 to 13
0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 68.8 to 74.6
92.9 to 95
Manganese (Mn), % 0.15 to 0.4
0.35 to 0.7
Molybdenum (Mo), % 4.5 to 5.5
0
Nickel (Ni), % 0
3.3 to 3.8
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0.1 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 3.8 to 4.8
0
Vanadium (V), % 1.3 to 1.7
0

Comparable Variants