AMS 4976 Ti-6Al-2Sn-4Zr-2Mo (Ti6242) Titanium Alloy

AMS 4976 Ti-6242 (UNS R54620) is a near-alpha titanium alloy offering 930-1010 MPa tensile strength, 500°C creep resistance, and excellent fracture toughness. Ideal for high-pressure compressor discs, blades, seals, and airframe components. Used in F414, F119, and TRENT800 engines. ZYTC Alloy is AS9120B and ISO 9001 certified.

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Ti-6Al-2Sn-4Zr-2Mo (Ti-6242 / UNS R54620)is a near-alpha titanium alloy specifically formulated for high-temperature service up to 500°C (930°F), offering an exceptional combination of creep resistance, high strength, and good toughness. Its relatively low density (4.54 g/cm³) makes it particularly attractive for weight-critical moving components in aerospace, power generation, and motorsport sectors.

The AMS 4976 specification covers a Ti-6Al-2Sn-4Zr-2Mo (UNS R54620) alloy in the form of forgings 3.000 inches (76.20 mm) and under in nominal diameter or least distance between parallel sides and 9 in2 (58 cm²) and under in cross-sectional area and forging stock of any size. The material specification also calls out Solution and Precipitation Heat Treated condition also known as Annealed state.

As a professional Chinese aerospace titanium alloymanufacturer,ZYTC Alloy implements strict full-process quality control in compliance with AMS 4976 aerospace standards. From raw material inspection, precision hot forging and standardized STA heat treatment to finished dimensional testing and performance verification, every production procedure is strictly controlled.

We guarantee stable mechanical performance, precise dimensional tolerance and consistent batch quality for all Ti6242 titanium forgings. With flexible custom processing capabilities, complete certification systems and reliable global delivery services, we have established long-term cooperative relationships with global aerospace and defense enterprises.

Product Specifications & Chemical Composition

AMS 4976 covers Ti-6242 alloy in the form of forgings 3.000 inches (76.20 mm) and under in nominal diameter or cross-sectional area, and forging stock of any size, in the solution and precipitation heat treated (annealed) condition . The material is also available in sheet, strip, and plate forms per AMS 4919 .

Available Forms: Forgings, forging stock, bar, billet, sheet, strip, and plate .
Specifications: AMS 4976 (forgings), AMS 4919 (sheet/strip/plate), AMS 4975 (bar/wire/rings), UNS R54620 .

Element	Weight %
Titanium (Ti)	Balance (approx. 88%)
Aluminum (Al)	5.5 – 6.5
Tin (Sn)	1.8 – 2.2
Zirconium (Zr)	3.6 – 4.4
Molybdenum (Mo)	1.8 – 2.2
Oxygen (O)	0.15 max
Iron (Fe)	0.25 max

Physical & Mechanical Properties

The alloy's near-alpha microstructure provides excellent creep resistance up to 500°C, with higher strength retention in larger section sizes compared to Ti-6Al-4V .

Property	Metric	Imperial
Density	4.54 g/cm³	0.164 lb/in³
Tensile Strength (Ultimate, Annealed)	930 – 1010 MPa	135 – 146 ksi
Yield Strength (0.2%, Annealed)	862 – 990 MPa	125 – 144 ksi
Elongation (4D)	8 – 10%	8 – 10%
Modulus of Elasticity	120 GPa	17,400 ksi
Hardness (Rockwell C)	34	34
Beta Transus	~990 – 1000°C	~1815 – 1830°F

Note: Mechanical properties vary with heat treatment condition .

Professional Heat Treatment Process & Mechanical Parameters

Ti6242 titanium forgings can be further strengthened through standardized quenching and aging (STA) heat treatment based on the annealed state, achieving graded mechanical performance for extreme working conditions.

For 120mm diameter forgings, the industrial standard heat treatment process adopts 980°C/1h/Air cooling + 593°C/8h/Air cooling.

After professional STA treatment, the material delivers superior and stable mechanical properties: room-temperature tensile strength reaches 980 MPa, high-temperature strength maintains nearly 700 MPa at 480°C, and the elongation rate stays above 12%, fully complying with strict aerospace high-temperature durability and load-bearing standards.

Applications

Owing to its remarkable high-temperature creep resistance, superior specific strength, fatigue resistance and structural stability, AMS 4976 Ti-6Al-2Sn-4Zr-2Mo titanium forgings are widely utilized in core high-temperature and high-load structural components across aerospace and defense industries:

Aircraft Fuselage Structural Components: Ideal for manufacturing aircraft beams, frames and stringers. These Ti6242 forged structural parts greatly enhance fuselage stiffness and overall structural stability, effectively resisting complex dynamic loads and alternating stresses during flight operation.
Aero Engine Hot-End Components: Widely used for turbine blades, turbine discs and guide vanes. The excellent high-temperature stability of AMS 4976 Ti6242 forgings ensures long-term structural integrity and operational safety for aero engine hot-end parts under extreme high-temperature and high-pressure working environments.
Missile & Defense Equipment Parts: Applied in missile body structures, tail fins, guidance systems and propulsion system components. The high toughness and anti-fatigue performance of Ti6242 forgings perfectly adapt to extreme stress and high-speed flight conditions of military defense equipment.

Looking for certified AMS 4976 Ti-6Al-2Sn-4Zr-2Mo titanium forgings with stable high-temperature performance and complete aerospace certifications? Contact ZYTC Alloy today to get free technical datasheets, official test reports and competitive factory wholesale quotes!

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