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SAE-AISI T8 Steel vs. ASTM A369 Grade FP5

Both SAE-AISI T8 steel and ASTM A369 grade FP5 are iron alloys. They have 78% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI T8 steel and the bottom bar is ASTM A369 grade FP5.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 78
74
Tensile Strength: Ultimate (UTS), MPa 780 to 2140
470

Thermal Properties

Latent Heat of Fusion, J/g 250
260
Melting Completion (Liquidus), °C 1730
1460
Melting Onset (Solidus), °C 1670
1420
Specific Heat Capacity, J/kg-K 420
470
Thermal Conductivity, W/m-K 18
40
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 45
4.3
Density, g/cm3 9.0
7.8
Embodied Carbon, kg CO2/kg material 10
1.7
Embodied Energy, MJ/kg 160
23
Embodied Water, L/kg 120
69

Common Calculations

PREN (Pitting Resistance) 30
6.8
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 24 to 66
17
Strength to Weight: Bending, points 21 to 41
17
Thermal Diffusivity, mm2/s 4.8
11
Thermal Shock Resistance, points 24 to 66
13

Alloy Composition

Carbon (C), % 0.75 to 0.85
0 to 0.15
Chromium (Cr), % 3.8 to 4.5
4.0 to 6.0
Cobalt (Co), % 4.3 to 5.8
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 69.3 to 75.4
92.1 to 95.3
Manganese (Mn), % 0.2 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 0.4 to 1.0
0.45 to 0.65
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0.2 to 0.4
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Tungsten (W), % 13.3 to 14.8
0
Vanadium (V), % 1.8 to 2.4
0