MakeItFrom.com
Menu (ESC)

ASTM A387 Grade 91 Class 2 vs. Grade 25 Titanium

ASTM A387 grade 91 class 2 belongs to the iron alloys classification, while grade 25 titanium belongs to the titanium alloys. There are 29 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 A387 grade 91 class 2 and the bottom bar is grade 25 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
110
Elongation at Break, % 20
11
Fatigue Strength, MPa 330
550
Poisson's Ratio 0.28
0.32
Shear Modulus, GPa 75
40
Shear Strength, MPa 420
600
Tensile Strength: Ultimate (UTS), MPa 670
1000
Tensile Strength: Yield (Proof), MPa 470
940

Thermal Properties

Latent Heat of Fusion, J/g 270
410
Maximum Temperature: Mechanical, °C 600
340
Melting Completion (Liquidus), °C 1460
1610
Melting Onset (Solidus), °C 1420
1560
Specific Heat Capacity, J/kg-K 470
560
Thermal Conductivity, W/m-K 26
7.1
Thermal Expansion, µm/m-K 13
9.6

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.9
1.0
Electrical Conductivity: Equal Weight (Specific), % IACS 10
2.0

Otherwise Unclassified Properties

Density, g/cm3 7.8
4.5
Embodied Carbon, kg CO2/kg material 2.6
43
Embodied Energy, MJ/kg 37
700
Embodied Water, L/kg 88
320

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110
Resilience: Unit (Modulus of Resilience), kJ/m3 580
4220
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
35
Strength to Weight: Axial, points 24
62
Strength to Weight: Bending, points 22
50
Thermal Diffusivity, mm2/s 6.9
2.8
Thermal Shock Resistance, points 19
71

Alloy Composition

Aluminum (Al), % 0 to 0.020
5.5 to 6.8
Carbon (C), % 0.080 to 0.12
0 to 0.080
Chromium (Cr), % 8.0 to 9.5
0
Hydrogen (H), % 0
0 to 0.013
Iron (Fe), % 87.3 to 90.3
0 to 0.4
Manganese (Mn), % 0.3 to 0.6
0
Molybdenum (Mo), % 0.85 to 1.1
0
Nickel (Ni), % 0 to 0.4
0.3 to 0.8
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0 to 0.050
Oxygen (O), % 0
0 to 0.2
Palladium (Pd), % 0
0.040 to 0.080
Phosphorus (P), % 0 to 0.020
0
Silicon (Si), % 0.2 to 0.5
0
Sulfur (S), % 0 to 0.010
0
Titanium (Ti), % 0 to 0.010
86.7 to 90.6
Vanadium (V), % 0.18 to 0.25
3.5 to 4.5
Zirconium (Zr), % 0 to 0.010
0
Residuals, % 0
0 to 0.4