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ASTM A356 Grade 8 vs. SAE-AISI P5 Steel

Both ASTM A356 grade 8 and SAE-AISI P5 steel are iron alloys. They have a very high 98% of their average alloy composition in common. 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 A356 grade 8 and the bottom bar is SAE-AISI P5 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 630
370 to 1980

Thermal Properties

Latent Heat of Fusion, J/g 260
250
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 38
45
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 3.5
2.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.5
Embodied Energy, MJ/kg 26
20
Embodied Water, L/kg 55
56

Common Calculations

PREN (Pitting Resistance) 4.7
2.3
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 22
13 to 70
Strength to Weight: Bending, points 21
15 to 45
Thermal Diffusivity, mm2/s 10
12
Thermal Shock Resistance, points 18
12 to 65

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.1
Chromium (Cr), % 1.0 to 1.5
2.0 to 2.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 95.4 to 97.4
95.7 to 97.8
Manganese (Mn), % 0.5 to 0.9
0.2 to 0.6
Molybdenum (Mo), % 0.9 to 1.2
0
Nickel (Ni), % 0
0 to 0.35
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0.2 to 0.6
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.050 to 0.15
0