UNS R54620 (Titanium alloy 6Al-2Sn-4Zr-2Mo) flange
UNS R56401 (Titanium alloy 6Al-4V ELI) flanges
UNS R56400 (Titanium alloy 6Al-4V) Plate Sheet

UNS R54620 (Titanium alloy 6Al-2Sn-4Zr-2Mo)

Short Introduction:

Titanium alloy 6Al-2Sn-4Zr-2Mo is primarily used for high strength and toughness, with good creep resistance up to 1000°F. Forging and machining characteristics similar to those of Ti 6Al-4V. Applications include compressor components, hot airframe skin, and engine afterburner structures. The weld ability of Ti 6-2-4-2 is fair, using AMS 4952 weld wire. Several different treatments are available.

    Category:

    Description

    UNS R54620 (Titanium alloy 6Al-2Sn-4Zr-2Mo)

    UNS R54620 (Titanium alloy 6Al-2Sn-4Zr-2Mo)

    Material grades and equivalents: Titanium alloy 6Al-2Sn-4Zr-2Mo /UNS R54620

    Grade 6Al 2Sn 4Zr 2Mo titanium alloy is a near alpha alloy. Near-alpha alloys contain a small amount of ductile beta-phase. It was developed to handle operations in high temperature applications of up to 538°C (°1000.4°F). This alloy has a combination of excellent strength and corrosion resistance with comparatively good weldabilty and fabricability.

    The following sections will discuss in detail about grade 6Al 2Sn 4Zr 2Mo titanium alloy.

    Chemistry Composition:

    Al

    Sn

    Zr

    Mo

    C

    N

    H

    O

    Si

    Fe

    Y

    Others,

    Each

    Others,

    Total

    Ti

    MIN

    5.5

    1.8

    3.6

    1.8

    –

    –

    –

    –

    0.06

    –

    –

    –

    –

    –

    MAX

    6.5

    2.2

    4.4

    2.2

    0.05

    0.05

    0.015

    0.12

    0.1

    0.25

    0.005

    0.1

    0.3

    Balance

    Features：

    • Machinability similar to austenitic stainless steels

    • Easily welded if proper precautions are taken to prevent oxygen, nitrogen and hydrogen contaminations

    • Long term stability for temperatures up to 800°F

    Applications：

    • Compressor discs, blades

    • Airframe structure, skin

    • Engine afterburner components

    • Hush kits

    Physical Properties:

    • Density: 0.160 lb/in3

    • Density: 0.160 lb/in3

    • Beta Transus: 1825±25°F

    • Thermal Conductivity: 4.00 Btu • hr/ft2 • hr°F

    • Coefficient of Thermal Expansion: 32-212°F 4.3 x10-6 in/in°F

    • Modulus of Elasticity: 16.5×106 psi

    Mechanical Properties：

    Minimum Tensile Properties, AMS 4919, Duplex Annealed

    Thickness

    0.025 ≤ 0.062

    > 0.062 ≤ 1.000

    > 1.000 ≤ 3.000

    Tensile Strength, ksi

    135,000

    135,000

    135,000

    0.2% offset Yield Strength, ksi

    125,000

    125,000

    125,000

    Elongation, %

    8

    10

    10

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