MakeItFrom.com
Menu (ESC)

Grade 38 Titanium vs. Grade 21 Titanium

Both grade 38 titanium and grade 21 titanium are titanium alloys. They have 82% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is grade 38 titanium and the bottom bar is grade 21 titanium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 110
140
Elongation at Break, % 11
9.0 to 17
Fatigue Strength, MPa 530
550 to 660
Poisson's Ratio 0.32
0.32
Reduction in Area, % 29
22
Shear Modulus, GPa 40
51
Shear Strength, MPa 600
550 to 790
Tensile Strength: Ultimate (UTS), MPa 1000
890 to 1340
Tensile Strength: Yield (Proof), MPa 910
870 to 1170

Thermal Properties

Latent Heat of Fusion, J/g 410
410
Maximum Temperature: Mechanical, °C 330
310
Melting Completion (Liquidus), °C 1620
1740
Melting Onset (Solidus), °C 1570
1690
Specific Heat Capacity, J/kg-K 550
500
Thermal Conductivity, W/m-K 8.0
7.5
Thermal Expansion, µm/m-K 9.3
7.1

Otherwise Unclassified Properties

Base Metal Price, % relative 36
60
Density, g/cm3 4.5
5.4
Embodied Carbon, kg CO2/kg material 35
32
Embodied Energy, MJ/kg 560
490
Embodied Water, L/kg 160
180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 110
110 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 3840
2760 to 5010
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 35
32
Strength to Weight: Axial, points 62
46 to 69
Strength to Weight: Bending, points 49
38 to 50
Thermal Diffusivity, mm2/s 3.2
2.8
Thermal Shock Resistance, points 72
66 to 100

Alloy Composition

Aluminum (Al), % 3.5 to 4.5
2.5 to 3.5
Carbon (C), % 0 to 0.080
0 to 0.050
Hydrogen (H), % 0 to 0.015
0 to 0.015
Iron (Fe), % 1.2 to 1.8
0 to 0.4
Molybdenum (Mo), % 0
14 to 16
Niobium (Nb), % 0
2.2 to 3.2
Nitrogen (N), % 0 to 0.030
0 to 0.030
Oxygen (O), % 0.2 to 0.3
0 to 0.17
Silicon (Si), % 0
0.15 to 0.25
Titanium (Ti), % 89.9 to 93.1
76 to 81.2
Vanadium (V), % 2.0 to 3.0
0
Residuals, % 0 to 0.4
0 to 0.4