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ASTM A369 Grade FP91 vs. Grade 27 Titanium

ASTM A369 grade FP91 belongs to the iron alloys classification, while grade 27 titanium belongs to the titanium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ASTM A369 grade FP91 and the bottom bar is grade 27 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 19
27
Fatigue Strength, MPa 320
170
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
41
Shear Strength, MPa 410
180
Tensile Strength: Ultimate (UTS), MPa 670
270
Tensile Strength: Yield (Proof), MPa 460
230

Thermal Properties

Latent Heat of Fusion, J/g 270
420
Maximum Temperature: Mechanical, °C 600
320
Melting Completion (Liquidus), °C 1460
1660
Melting Onset (Solidus), °C 1420
1610
Specific Heat Capacity, J/kg-K 470
540
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 13
8.7

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
3.6
Electrical Conductivity: Equal Weight (Specific), % IACS 10
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
37
Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.6
33
Embodied Energy, MJ/kg 37
530
Embodied Water, L/kg 88
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
70
Resilience: Unit (Modulus of Resilience), kJ/m3 560
240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 24
17
Strength to Weight: Bending, points 22
21
Thermal Diffusivity, mm2/s 6.9
8.8
Thermal Shock Resistance, points 18
21

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
0 to 0.080
Chromium (Cr), % 8.0 to 9.5
0
Hydrogen (H), % 0
0 to 0.015
Iron (Fe), % 87.3 to 90.3
0 to 0.2
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0 to 0.030
Oxygen (O), % 0
0 to 0.18
Phosphorus (P), % 0 to 0.025
0
Ruthenium (Ru), % 0
0.080 to 0.14
Silicon (Si), % 0.2 to 0.5
0
Sulfur (S), % 0 to 0.025
0
Titanium (Ti), % 0 to 0.010
99 to 99.92
Vanadium (V), % 0.18 to 0.25
0
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.4