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ASTM A369 Grade FP9 vs. AWS ERTi-7

ASTM A369 grade FP9 belongs to the iron alloys classification, while AWS ERTi-7 belongs to the titanium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP9 and the bottom bar is AWS ERTi-7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
20
Fatigue Strength, MPa 160
190
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
40
Tensile Strength: Ultimate (UTS), MPa 470
340
Tensile Strength: Yield (Proof), MPa 240
280

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 600
320
Melting Completion (Liquidus), °C 1450
1670
Melting Onset (Solidus), °C 1410
1620
Specific Heat Capacity, J/kg-K 480
540
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.0
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 10
7.3

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.0
47
Embodied Energy, MJ/kg 28
800
Embodied Water, L/kg 87
470

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
64
Resilience: Unit (Modulus of Resilience), kJ/m3 140
360
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 17
21
Strength to Weight: Bending, points 17
24
Thermal Diffusivity, mm2/s 6.9
8.8
Thermal Shock Resistance, points 13
26

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.030
Chromium (Cr), % 8.0 to 10
0
Hydrogen (H), % 0
0 to 0.0080
Iron (Fe), % 87.1 to 90.3
0 to 0.12
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.9 to 1.1
0
Nitrogen (N), % 0
0 to 0.015
Oxygen (O), % 0
0.080 to 0.16
Palladium (Pd), % 0
0.12 to 0.25
Phosphorus (P), % 0 to 0.030
0
Silicon (Si), % 0.5 to 1.0
0
Sulfur (S), % 0 to 0.030
0
Titanium (Ti), % 0
99.417 to 99.8