1. Introduce
– Ti-15V-3Cr-3Sn-3Al
– Typical metastable β Ti alloys
– Alloys typically available for temperatures up to 288°C
– UNS R58158
* Metastable β titanium alloys
– Alloys with large additions of β-stabilizing elements such as V, Mo, Cr, etc.
– Can be transformed into other phases by heat treatment or deformation to improve the strength and toughness of the alloy
– Modular structure with periodic bends in the microstructure, showing diffraction streak phenomenon
– The metastable properties of the beta phase of Ti alloys are obtained in the quenching condition after solubilization treatment
* Ti-15333 β-phase metastable properties
– Mechanical properties are obtained by quenching after heat treatment at 900 degrees C, a single region of β phase
* UNS
- Abbreviation for Unified Numbering Systems for Metals and Alloys
- Unified unique numbering system for metals and alloys
- A representative number that is compatible with metals and alloys defined in many material-related codes such as ASTM, AISI, ASME, AWS, etc.
* R : Reactive and Refractory Metals and Alloys
* UNS R58158 : 5XXXX : Titanium
2. Property
– Strength, fatigue resistance, corrosion resistance, plasticity, forging, cold forming, good weldability
| Element | Impact |
|---|---|
| V | Provides high temperature strength |
| Cr | Provides corrosion resistance, wear resistance, and oxidation resistance |
| Sn | Highly strengthened element, provides strength and hardness |
| Al | Grain refinement element, provides high temperature oxidation resistance |
[Ti 15333 Chemical Composition (%)]
| Ti | N | C | H | Fe |
|---|---|---|---|---|
| 73.00 ~ 78.50 | Max. 0.05 | Max. 0.05 | Max. 0.02 | Max. 0.25 |
| O | Al | V | Cr | Sn |
|---|---|---|---|---|
| Max. 0.13 | 2.50 ~ 3.50 | 14.00 ~ 16.00 | 2.50 ~ 3.50 | 2.50 ~ 3.50 |
[Ti 15333 Mechanical Composition (%)]
| Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) | Hardness HV typical |
|---|---|---|---|
| 703 | 690 | 12 | 245 |
[Ti 15333 Physical Properties]
| Density (g/㎤) | Melting Range (℃) | Beta transus temperature (℃) |
|---|---|---|
| 4.78 | 1668 | 750 ~ 770 |
3. Standard & Specification
– Specification : UNS R58158
| SAE | AMS 4914 |
4. Available Form
– Bar, Rod
– Sheet, Strip, Plate
– Coil, Wire
– Forgings
5. Application & Product
– Aerospace, Chemical
| Application | Product |
|---|---|
| Aerospace | Fasteners, Tank components, Tubing, Landing gear, Rotor blades |
| Chemical | Pressure vessels, Pipes |
(1) Fasteners / (2) Rotor blades / (3) Pressure vessels
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