Beta 21S (Grade 21, UNS R58210) is a high-strength, heat-treatable, metastable β-type titanium alloy, typically alloyed according to the Ti-15Mo-3Al-2.7Nb-0.25Si composition. The ASTM B348/B348M standards include Grade 21 / UNS R58210 in their specifications for titanium bars and billets made from titanium alloys.
Beta 21S was specifically developed for high-performance applications in the aerospace industry, offering excellent cold formability and weldability, as well as providing superior resistance to oxidation and creep, and high-temperature stability compared to traditional β-type titanium alloys.
This alloy also exhibits good resistance to aerospace hydraulic fluids and can be used in aerospace structural components, fasteners, metal-matrix composites, and parts requiring high strength and high-temperature resistance.
Used for: aircraft engine components, aircraft structural parts, high-strength fasteners, and hydraulic system components.
It can be used to manufacture bolts, screws, rivets, and fasteners.
Beta 21S exhibits good resistance to hydraulic fluids used in the aerospace industry.
Beta 21S can be used as a matrix material for metal-matrix composites.
| диаметр(mm) | Length (customizable) |
|---|---|
| Ø0.5mm | Customized according to customer requirements |
| Ø0.889mm | Customized according to customer requirements |
| Ø1.00-2.00 mm | Customized according to customer requirements |
| Ø2.00-3.00 mm | Customized according to customer requirements |
| Ø3.00-4.00mm | Customized according to customer requirements |
| Ø4.00-5.00 mm | Customized according to customer requirements |
Properties in solution and in the aged state:
| Rod diameter | Heat treatment status | Strength strength Rm | Yield strength Rp0.2 | Extension A | Relative narrowing Z |
|---|---|---|---|---|---|
| 10–70 mm | After solvent treatment and aging | ≥1250MPa | ≥1105MPa | ≥8% | ≥15% |
| >70–100 mm | After solvent treatment and aging | ≥1250MPa | ≥1105MPa | ≥8% | ≥15% |
| >100–180 mm | After solvent treatment and aging | ≥1250MPa | ≥1105MPa | ≥6% | ≥10% |
