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SAE-AISI M47 Steel vs. SAE-AISI P20 Steel

Both SAE-AISI M47 steel and SAE-AISI P20 steel are iron alloys. They have 85% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI M47 steel and the bottom bar is SAE-AISI P20 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 810 to 2310
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 270
260
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1500
1420
Specific Heat Capacity, J/kg-K 450
470
Thermal Conductivity, W/m-K 23
45
Thermal Expansion, µm/m-K 11
12

Otherwise Unclassified Properties

Base Metal Price, % relative 26
2.8
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 7.4
1.6
Embodied Energy, MJ/kg 100
21
Embodied Water, L/kg 120
52

Common Calculations

PREN (Pitting Resistance) 38
2.6
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 28 to 79
19 to 37
Strength to Weight: Bending, points 24 to 48
19 to 29
Thermal Diffusivity, mm2/s 6.3
12
Thermal Shock Resistance, points 27 to 77
18 to 35

Alloy Composition

Carbon (C), % 1.1 to 1.2
0.28 to 0.4
Chromium (Cr), % 3.5 to 4.0
0.4 to 2.0
Cobalt (Co), % 4.8 to 5.3
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 78.7 to 85
95.2 to 98.5
Manganese (Mn), % 0.15 to 0.4
0.35 to 0.71
Molybdenum (Mo), % 9.3 to 10
0.3 to 0.55
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.45
0.2 to 0.8
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.3 to 1.8
0
Vanadium (V), % 1.2 to 1.4
0

Comparable Variants