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ASTM A369 Grade FP12 vs. SAE-AISI P20 Steel

Both ASTM A369 grade FP12 and SAE-AISI P20 steel are iron alloys. Their average alloy composition is basically identical. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP12 and the bottom bar is SAE-AISI P20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
73
Tensile Strength: Ultimate (UTS), MPa 470
540 to 1050

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1470
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 45
45
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.3
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.3
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
2.8
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 1.6
1.6
Embodied Energy, MJ/kg 21
21
Embodied Water, L/kg 52
52

Common Calculations

PREN (Pitting Resistance) 2.8
2.6
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 17
19 to 37
Strength to Weight: Bending, points 17
19 to 29
Thermal Diffusivity, mm2/s 12
12
Thermal Shock Resistance, points 14
18 to 35

Alloy Composition

Carbon (C), % 0.050 to 0.15
0.28 to 0.4
Chromium (Cr), % 0.8 to 1.3
0.4 to 2.0
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 96.8 to 98.4
95.2 to 98.5
Manganese (Mn), % 0.3 to 0.61
0.35 to 0.71
Molybdenum (Mo), % 0.44 to 0.65
0.3 to 0.55
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.5
0.2 to 0.8
Sulfur (S), % 0 to 0.025
0 to 0.030