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

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